tag:blogger.com,1999:blog-39374299253138437212012-02-04T06:53:31.903+11:00Mainly notes to self (and for anyone else that may find them useful)twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.comBlogger6141100tag:blogger.com,1999:blog-3937429925313843721.post-52276514031173165802012-02-03T09:31:00.001+11:002012-02-03T09:32:14.220+11:00

Displaying the size of files is one thing but formatting them so they're actually understandable by humans, Another. I've found this useful snippet by inkdeep but corrected the bit/byte units, used a different rounding function and cleaned up the if blocks. function humanize_filesize(fs) { if (fs >= 1073741824) { return round_number(fs / 1073741824, 2) + ' GB'; } if (fs >= 1048576)    {

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com0tag:blogger.com,1999:blog-3937429925313843721.post-76329424483660617142012-02-03T09:25:00.001+11:002012-02-03T09:25:26.864+11:00

Simple little snippet which I was surprised wasn't part of the Math class. function round_number(num, dec) { return Math.round(num*Math.pow(10,dec))/Math.pow(10,dec); } Source Javascript to Round to 2 Decimal Places? by aleksei

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com0tag:blogger.com,1999:blog-3937429925313843721.post-83329432795922236542012-01-31T22:42:00.001+11:002012-01-31T22:49:18.580+11:00

Perhaps the best documented out of the social share buttons. It's quite straight forward if you read the API page. A simple example with asynchronous loading would be: <g:plusone></g:plusone> <script type="text/javascript"> (function() { var po = document.createElement('script'); po.type = 'text/javascript'; po.async = true; po.src = 'https://apis.google.com/js/plusone.js'; var s =

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com0tag:blogger.com,1999:blog-3937429925313843721.post-82759019568083304022012-01-31T22:28:00.001+11:002012-01-31T22:48:32.988+11:00

Bloody hell this was more cryptic than it should have been. You have two options. Easy way First option is the deprecated (but still used on YouTube) "share" button. You simply just create a link in a new window like: <a rel="nofollow" href=http://www.facebook.com/sharer.php?u=encodedURL&t=encodedTitle">Facebook</a> It's easy because you can style it whatever way you want. Drawback is you

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com0tag:blogger.com,1999:blog-3937429925313843721.post-39988095440690480522012-01-31T21:48:00.001+11:002012-01-31T22:48:29.710+11:00

Visit the Twitter Buttons page to generate your own. To customise it a bit, you'll have to get your hands a little dirty. Taking this for example: <a href="https://twitter.com/share" class="twitter-share-button" data-url="http://twigstechtips.blogspot.com" data-text="I found this stupid post" data-via="myawesomeshirt" data-hashtags="shirts">Tweet</a> <script>!function(d,s,id){var js,fjs=

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com0tag:blogger.com,1999:blog-3937429925313843721.post-63414510230451849552012-01-29T12:10:00.001+11:002012-01-29T12:10:36.049+11:00

IE6 has a pretty bad reputation for being incompatible with standards, and these days IE7 is the new IE6. One of the biggest gripes I have about it is the inability to use display inline-block! It's the saviour of all layout rendering issues, yet shamed by IE. Well, luckily there's a "compatibility hack" for it. .shirt-details .tabs { font-weight: bold; font-size: larger; display:

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com0tag:blogger.com,1999:blog-3937429925313843721.post-24980196033182271522012-01-24T10:34:00.001+11:002012-01-24T10:34:05.104+11:00

Getting sick of Firefox and their stupid rolling releases. Even more so with the speed and memory usage. Switching between browsers hasn't really been a problem for me when it comes to vanilla installs, except for Opera. What the heck is that Ctrl+K shortcut? Most browsers seem to focus to the search or address controls when it's pressed. Opera on the other hand goes to some weird profiles thing

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com0tag:blogger.com,1999:blog-3937429925313843721.post-79636987522574680482012-01-18T11:20:00.001+11:002012-01-18T11:20:59.775+11:00

For the most part, the forms class works pretty well. Unless you're trying to specify exactly where an error should show up in the clean() function... If you're using fieldname_clean() methods, then this isn't a problem. However, during your clean() method you find that it makes more sense to target an error towards a certain field, you can't do it by simply raising a forms.ValidationError.

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com0tag:blogger.com,1999:blog-3937429925313843721.post-69005273515573328392012-01-17T21:43:00.001+11:002012-01-17T21:43:15.013+11:00

My my, so many damn files to choose from for SP1. Take a look for yourself! Files of interest 7601.17514.101119-1850_Update_Sp_Wave1-GRMSP1.1_DVD.iso The first one contains the whole SP1 she-bang for 32bit, 64bit AMD and 64bit Intel chipsets. It assumes that you're going to be using this DVD multiple times on various machines. windows6.1-KB976932-IA64.exe windows6.1-KB976932-X64

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com0tag:blogger.com,1999:blog-3937429925313843721.post-85246973683416571022012-01-17T09:27:00.001+11:002012-01-17T09:27:07.825+11:00

Usually send_mail() will suffice for most emailing functionality, but when you need to attach something, the helpful Django wrapper function won't allow it. If you need to add attachments to your emails, you'll have to go deeper. Alright, down to the nitty gritty. from django.core.mail.message import EmailMessage email = EmailMessage() email.subject = "New shirt submitted" email.body =

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com0tag:blogger.com,1999:blog-3937429925313843721.post-42611345631499181482012-01-17T09:07:00.001+11:002012-01-17T09:08:48.615+11:00

Fuck having to log in to disable autoplay of videos. That shit shouldn't be on unless you turn it on. It's like being raped in the skull... but given a choice if you want to sign up or not. This snippet removes the video altogether, but to be honest you don't miss it at all. These instructions are for Firefox, but are probably similar for other browsers. Install the AdBlockPlus

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com0tag:blogger.com,1999:blog-3937429925313843721.post-40052364115976516602012-01-17T09:03:00.003+11:002012-01-17T09:04:09.915+11:00

I was amazed to how many ways there were to sort lists in Python. Better yet, you DON'T need to create a new function to sort things like you do in PHP. Basic Sorting Create a copy of the list sorted([5, 2, 3, 1, 4]) [1, 2, 3, 4, 5] Sort and modify the list This method only works for lists. a = [5, 2, 3, 1, 4] a.sort() a [1, 2, 3, 4, 5] Sort by Key Pyhon 2.4 brings the "key"

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com0tag:blogger.com,1999:blog-3937429925313843721.post-77356638204219351042012-01-17T09:03:00.001+11:002012-01-17T09:03:22.058+11:00

A great little command that definitely saves you time! :g/.*foo.*/d the "d" at the end is replaceable so you can use other commands if needed. Source Delete Lines Matching Keyword

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com0tag:blogger.com,1999:blog-3937429925313843721.post-91717696132930328932012-01-12T21:32:00.001+11:002012-01-16T19:51:11.720+11:00

There's no need to glorify how a backup can save the day. If you've been hit by a critical hard drive error, you'll know what I mean. They don't have a clue how it feels to be hit by a hdd error... So without further adieu, let's begin. Setting up automatic access: Your source machine will need to be able to access the destination machine without requiring a password. Why? It's better

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com0tag:blogger.com,1999:blog-3937429925313843721.post-60716473934842537072012-01-08T17:56:00.001+11:002012-01-08T17:56:27.225+11:00

The stock fonts provided with Android aren't bad, but if you need to give your app/game a bit more mood then you need some custom fonts. To embed a custom font into your app, you need to create an "assets/fonts" folder and copy your TTF file there. In your code: Typeface font = Typeface.createFromAsset(this.getContext().getAssets(), "fonts/Jokerman.ttf"); TextView tv = (TextView)

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com0tag:blogger.com,1999:blog-3937429925313843721.post-11265586495694048892012-01-08T17:48:00.001+11:002012-01-08T17:48:13.640+11:00

Wow, I thought I wrote something about this some time ago but I guess I didn't. Ran into this issue again when writing my Diablo II Runewords app. The ListView isn't exactly the most intuitive thing to pick up and use. It's some clever work, but the whole thing is also a mess of views, adapters and layouts. A by-product of over engineering, probably second worst case after Activities.

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com0tag:blogger.com,1999:blog-3937429925313843721.post-9357997796071179842012-01-08T16:21:00.001+11:002012-01-08T16:21:18.088+11:00

A very handy built-in class to have is JSONTokener which I used for my Diablo II Runewords app. public RunewordParser(String data) throws JSONException { // Parse String "data" JSONObject json = (JSONObject) new JSONTokener(data).nextValue(); // Some primitive data types stones = json.getString("stones"); matched = json.getInt("matched"); onlyComplete = json.getBoolean("

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com2tag:blogger.com,1999:blog-3937429925313843721.post-67199952873922471972012-01-08T16:10:00.001+11:002012-01-08T16:10:32.589+11:00

Wow, this was a neat little feature I never knew existed until recently. If you're connected to SSH to a remote server, you can tunnel through firewalls and access services via your remote computer using this method. In the PuTTY configuration: Go to "Connection" > "SSH" > "Tunnels" For source port, enter in the port number you'd normally use on the remote machine (for instance 4680)

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com0tag:blogger.com,1999:blog-3937429925313843721.post-91165625930252630722012-01-08T15:56:00.001+11:002012-01-08T15:56:38.597+11:00

It's likely in your vhost conf file that you've got the same daemon process already defined somewhere. WSGIDaemonProcess  twig processes=10 threads=3 display-name=%{GROUP} Ensure that "twig" part is UNIQUE by renaming it to something more project specific. Source SSL on Apache2 with WSGI

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com0tag:blogger.com,1999:blog-3937429925313843721.post-63373823628752972862012-01-08T15:50:00.001+11:002012-01-08T15:50:14.409+11:00

It was incredibly simple to create XML structure in Python. from xml.etree.ElementTree import Element from xml.etree import ElementTree # Build the XML root = Element("products") root.set('matches', "15") root.set('search_query', "whatever I searched for") for p in products: element = Element('product') element.set('name', p.name) element.set('brand', p.brand) element.set('price', "%s

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com0tag:blogger.com,1999:blog-3937429925313843721.post-35678350431896208322012-01-08T15:36:00.001+11:002012-01-08T15:36:30.842+11:00

If you're building more than one website, it's often useful to share code between the two (such as user profile information or common utility code). An example is: ProjectA submoduleA submoduleB submoduleC profiles

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com0tag:blogger.com,1999:blog-3937429925313843721.post-88117570560571613292012-01-08T14:57:00.001+11:002012-01-08T15:02:20.880+11:00

Man! This has been a pain in the ass since switching routers. After setting up a DynDNS to point to your IP (in this instance, we'll use "twig.dyndns.com"), this is the ideal workflow from the Internet. From outside your home network, access SSH at twig.dyndns.com. DynDNS translates the address to your IP "200.100.50.25". Client's request reaches your home router Which sees the

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com0tag:blogger.com,1999:blog-3937429925313843721.post-62115267175344065332011-12-30T13:44:00.001+11:002011-12-30T13:45:16.187+11:00

When a process supports daemon mode, you can either run it in a screen instance or init.d script. If you had to kill off a rogue daemon and need to start it again via SSH, you can restart the daemon with a very simple addition to the command: For example you have /bin/daemon_process with the parameters "--daemon --log-path=~/logs/blah/" You can execute it with: /bin/daemon_process --daemon -

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com1tag:blogger.com,1999:blog-3937429925313843721.post-90623529829993437932011-12-26T23:04:00.001+11:002011-12-27T00:43:38.756+11:00

Some people contacted me with problems trying to open files in my CodePeeker app on CM7. The OI File Manager built into the CFW is returning something unexpected, causing the app to fail in opening files. This resulted in a few "1 star - DOES NOT WORK" ratings... This is MADNESS! Why!? The reasoning behind this is because OpenIntent's OI File Manager wasn't returning data according to the

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com0tag:blogger.com,1999:blog-3937429925313843721.post-26386749823908793062011-12-22T11:48:00.001+11:002011-12-22T11:48:01.785+11:00

I had some issues with transparent PNG images causing some strange effects when resized and saved with Python's PIL Image library. As you can see, those jarring effects are hard to ignore. The issue was I was ignoring the alpha channel during conversion and it didn't quite know what to do with it. image = Image.open("some_file.png") image.convert("RGBA") # Convert this to RGBA if

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com0tag:blogger.com,1999:blog-3937429925313843721.post-18409223936441512802011-12-21T13:12:00.001+11:002011-12-21T13:12:43.827+11:00

A tricky little devil this one. For instance, you've got a "created" date in your form and you need it to be set to the current date whenever the page is displayed. So immediately you go and do this class SomeForm(forms.Form): test_datetime = forms.SplitDateTimeField(initial = datetime.datetime.now()) First load, sweet it works. But load the page again, and you'll realise the date is still

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com0tag:blogger.com,1999:blog-3937429925313843721.post-13262049852323005282011-12-20T23:09:00.001+11:002011-12-20T23:09:22.390+11:00

Error connecting to the server: server closed the connection unexpectedly This probably means the server terminated abnormally before or while processing the request. If you're running Windows, PostgreSQL and you've seen this, it's probably driving you bonkers! No matter what programming language you use, what interface library or even the default client, you'll get this damn

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com0tag:blogger.com,1999:blog-3937429925313843721.post-54205261783574454942011-12-09T17:25:00.001+11:002011-12-09T17:26:58.705+11:00

So the annoying thing about character fields is that they have a limit. When you try to save the row and the data is too long, it'll fail. So to increase the limit, run this query: ALTER TABLE tablename ALTER COLUMN url TYPE varchar(500), ALTER COLUMN description TYPE varchar(300); That's it! The fields url/description will now have the lengths of 500/300 respectively and maintain the

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com1tag:blogger.com,1999:blog-3937429925313843721.post-90547450339292625522011-12-09T11:09:00.001+11:002011-12-09T11:11:42.598+11:00

A bit hard to describe in words, but easier in an example. Say for instance I have these values in my database table. id | rowA | rowB ---------------- 1  | 3    | 1 2  | 3    | 2 3  | 3    | 3 4  | 3    | 4 5  | 3    | 5 To find the rows where rowA >= rowB, you just use the F class. from django.db.models import F Model.objects.filter(rowA__gte=F('rowB')) So easy but never crossed this

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com0tag:blogger.com,1999:blog-3937429925313843721.post-58030347542536075742011-11-25T14:57:00.001+11:002011-11-25T14:57:08.616+11:00

Git 1.7.0 added a feature which marks submodules as dirty if an untracked file is in it. --- a/article +++ b/article @@ -1 +1 @@ -Subproject commit aba7c80124b0ac07299f224f1bf7ddd4c9a095e3 +Subproject commit aba7c80124b0ac07299f224f1bf7ddd4c9a095e3-dirty ... diff --git a/south b/south --- a/south +++ b/south @@ -1 +1 @@ -Subproject

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com0tag:blogger.com,1999:blog-3937429925313843721.post-54835015253311934962011-11-20T01:44:00.001+11:002011-11-20T01:51:27.535+11:00

For my app Moustachify Everything, I was getting quite a few 1-star ratings when users got a black screen for the results. It took me a while to figure out why it was happening. Because I test on WiFi, the images upload quite quickly. When testing with 3G, I accidentally rotated the screen and the progress dialog was cleared, leaving me with just a black screen and an ad. When the AsyncTask

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com0tag:blogger.com,1999:blog-3937429925313843721.post-11660182456197186472011-11-19T23:52:00.001+11:002011-11-19T23:52:44.282+11:00

Now this was surprising. I had to update a project and I guess it's been over a year since I've started Android development. Apparently Android SDK only signs the debug certificate for a year. This can be a bit annoying because you have to uninstall all your testing apps after you create a new debug certificate. First up, open up Windows Explorer and paste in "%HOMEPATH%\.android" Locate

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com1tag:blogger.com,1999:blog-3937429925313843721.post-618862068339824442011-11-19T13:25:00.001+11:002011-11-19T13:25:05.759+11:00

A common query in SQL would be: SELECT DISTINCT type FROM Item ORDER BY type; In Django however, it's a little tricker since we've got the ORM. Items.objects.order_by('type').values_list('type', flat = True).distinct() Unusual? Yes. Impossible? No.

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com0tag:blogger.com,1999:blog-3937429925313843721.post-91877641223436894552011-11-17T14:33:00.001+11:002011-11-17T14:33:49.554+11:00

I've seen this a couple of times but never got around to figuring out how it works. First, type up the cells which will be used as reference.   Select the cells you want to apply the "dropdown list" to Click on Data > Validation Change "Allow" to "List" Click the little weird icon in "Source" Select the cells containing the list of items   Confirm by clicking

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com4tag:blogger.com,1999:blog-3937429925313843721.post-60467462137405974292011-11-17T14:22:00.001+11:002011-11-17T14:22:54.310+11:00

Took me some time to get this working but I finally got it! You can grab the Python 2.4 to 3.2 binaries (for both x86 and x64) from StickPeople. I used WinRAR to extract the contents of the EXE by right clicking the file. Move the contents of "PLATLIB\psycopg2" To "your_python_folder\Lib\site-packages\psycopg2" Source win-psycopg

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com0tag:blogger.com,1999:blog-3937429925313843721.post-13982662705922092422011-11-17T14:21:00.001+11:002011-11-17T14:21:47.306+11:00

All I want to do is send a fucking ZIP file to my friend. I'm not going to install an antivirus just so I can send files. Security in airports I can understand. Over-zealous security on my computer? Please go away. I don't have an antivirus. Seriously. Common sense has kept my work computer safe for over 3 years now. My solution? Fuck installing an antivirus and just run the command prompt.

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com0tag:blogger.com,1999:blog-3937429925313843721.post-70917885454605246372011-11-16T19:49:00.001+11:002011-11-16T19:50:00.004+11:00

Sad to say it, but I've been hooked on a 11yr old game again. The latest patch however is not compatible with many hacks and mods. At time of writing, the latest patch is 1.13d. One of the most popular mods being PlugY, which increases your stash size and allows you to get Ladder/Online Only rune words in single player mode. To get it working, you'll need to downgrade. Sorry, I don't know of

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com0tag:blogger.com,1999:blog-3937429925313843721.post-31051843804320824772011-11-14T09:19:00.001+11:002011-11-14T09:19:06.941+11:00

I like to use the keyboard where possible. In Firefox, I set my Ctrl+Page Up/Down buttons to switch between tabs so I don't have to reach for my mouse as much. However, when I tried to do this on Opera... god damn wut!? This is one of the cases where it's harder than it should have been. Firstly, find the settings dialog by: Going to Opera > Settings > Preferences (Ctrl + F12) Advanced >

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com0tag:blogger.com,1999:blog-3937429925313843721.post-45120817226444350412011-11-03T16:45:00.001+11:002011-11-03T16:47:01.638+11:00

So I was using the work PC to extract some files I received in my email. Damn it I'm just trying to extract some files for work, stop treating me like a grandma! Fuck this. Right click on the file > "Properties" > "Unblock". Try extracting again and it'll work. To prevent files from being tagged as "unsafe", follow the instructions in my previous post Windows 7: Disable the "Open File

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com2tag:blogger.com,1999:blog-3937429925313843721.post-50515813712574961802011-10-17T09:44:00.001+11:002011-10-17T09:44:38.471+11:00

This sounds like such a trivial thing to do but it wasn't the most logical. Alright, you'll need a tuple that contains the True/False value and labels and then a ChoiceField which uses it. class CustomForm(forms.Form): BOOLEAN_CHOICES = (('1', 'True label'), ('0', 'False label')) # Filtering fields is_true = forms.ChoiceField(choices = BOOLEAN_CHOICES, widget = forms.RadioSelect) Oh

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com1tag:blogger.com,1999:blog-3937429925313843721.post-91910672941741150252011-10-17T09:37:00.001+11:002011-10-17T09:37:34.219+11:00

Usually when you create a form in Django, you have to know what items you want to allow as the initial values, otherwise it'll give you an invalid_choice error: Select a valid choice. 'X' is not one of the available choices. Normally it's fine, it's just some dope changing values on their browser and messing with your form by sending dodgy data. But things get a little more complicated

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com0tag:blogger.com,1999:blog-3937429925313843721.post-50203838823920629622011-10-17T09:28:00.001+11:002011-10-17T09:28:11.240+11:00

CSV is one of the oldest and simplest format for spreadsheets. If you've ever found yourself having to dump out some data in this format, Python makes it hella easy to do so. headings = ['Category', 'Systemtype', 'SystemModel', 'ModelID', 'Type', 'Manufacturer', 'ProductName', 'OrigProductName', 'Processor', 'ProcessorSpeed', 'Monitor', 'Memory', 'OperatingSystem', 'HardDrive' ] # Open up the

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com0tag:blogger.com,1999:blog-3937429925313843721.post-34236324653015966142011-10-13T23:50:00.001+11:002011-10-13T23:50:56.183+11:00

Sometimes all we really need is to check if a URL is valid. You know, the standard "http(s)://domain.com/something/" pattern. It took a while to find, but the API level 1 had it all along! Just use URLUtil.isValidUrl() to test it. // Validate URL if (!URLUtil.isValidUrl(url)) { Toast.makeText(this, "Invalid URL specified", Toast.LENGTH_SHORT).show(); return; } That's all folks!  

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com0tag:blogger.com,1999:blog-3937429925313843721.post-89320540000857784112011-10-13T16:09:00.001+11:002011-10-13T16:09:58.990+11:00

If you're using the shell to do some testing, this error could cause you some grief and set you back by forcing you to start the terminal. Thankfully, the solution is short. Just paste in this snippet and it'll be rolled back to a usable state. from django.db import transaction transaction.rollback() Sources How do you rollback during Django shell session after causing DatabaseError?

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com0tag:blogger.com,1999:blog-3937429925313843721.post-82786011823303459472011-10-13T09:38:00.001+11:002011-10-13T09:38:17.215+11:00

A neat little snippet which detects when a user has pressed "Enter" on the keyboard. $('#id_query').keypress(function(e) { var key = (e.keyCode || e.which); if (key == 13) { e.preventDefault(); alert("hi!"); } }); Sources Submitting a form on 'Enter' with jQuery? jQuery plugin: SafeEnter 1.0

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com0tag:blogger.com,1999:blog-3937429925313843721.post-23223874187765310392011-10-13T09:13:00.001+11:002011-10-13T09:13:29.296+11:00

A somewhat tricky error to debug. Take for example this: >>> u"%s" % Product.objects.get(pk = 7431).manufacturer  u'DéLonghi' Now look at it again. >>> "%s" % Product.objects.get(pk = 7431).manufacturer 'D\xc3\xa9Longhi' Did you spot the difference? There's a "u" in front of the string. That "u" tells Python you want it to be a unicode string rather than an ASCII

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com0tag:blogger.com,1999:blog-3937429925313843721.post-79175595229204412182011-10-12T09:44:00.001+11:002011-10-12T09:44:07.014+11:00

While implementing a certain feature, we wanted to restrict it's functionality to a range of IP's only available in the office. To do that, you first need to download netaddr from github. import netaddr def cache_purge_allowed(request): client_ip = request.META.get('HTTP_X_FORWARDED_FOR', request.META.get('REMOTE_ADDR', None)) if client_ip is None: return False ip =

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com0tag:blogger.com,1999:blog-3937429925313843721.post-12058547392455047232011-10-12T09:43:00.001+11:002011-10-13T10:16:10.334+11:00

An interesting (and somewhat tedious) problem came up. We wanted to gather the most recently active blog authors sorted by post date. Basically, it'd just be a distinct on the authors while sorting by latest post publication date. In the words made famous by Jeremy Clarkson on Top Gear, "How hard can it be?". To be honest, quite hard. Things were duplicated everywhere! After a few hours of

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com0tag:blogger.com,1999:blog-3937429925313843721.post-48204600570183431402011-10-12T09:42:00.001+11:002011-10-12T09:42:54.421+11:00

It wasn't the easiest solution to find on the net, but a fairly simple one to implement. Some solutions even suggest recompiling Python with OpenSSL installed. Sorry, too much trouble, not an option! from urllib2 import URLError, HTTPPasswordMgrWithDefaultRealm, HTTPBasicAuthHandler, install_opener, build_opener # Set up a HTTPS request with username/password authentication try: # create a

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com0tag:blogger.com,1999:blog-3937429925313843721.post-18291342795248355242011-10-12T09:40:00.001+11:002011-10-12T09:41:29.877+11:00

This was a tricky one for me. I was trying to use wget to download a file but it wouldn't work properly! subprocess.call("wget --tries=3 --retry-connrefused http://dl.dropbox.com/u/446679/dog-bites-cat.jpg") Once I ran it... Traceback (most recent call last):   File "<console>", line 1, in <module>   File "/usr/lib/python2.6/subprocess.py", line 470, in call     return Popen(*

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com0tag:blogger.com,1999:blog-3937429925313843721.post-64138559936966776272011-10-12T09:39:00.001+11:002011-10-12T09:39:12.238+11:00

With the following snippets, you can get yourself: Image width/height Image mime type File size So, the code snippet! from PIL import Image import urllib2 import cStringIO import os from stat import ST_SIZE file = cStringIO.StringIO(urllib2.urlopen(image_url).read()) filename = "/tmp/file_%s.jpg" % datetime.datetime.now().strftime("%s") image_info = Image.open(file)

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com0tag:blogger.com,1999:blog-3937429925313843721.post-21968102422108464582011-10-11T14:51:00.001+11:002011-10-11T14:51:23.407+11:00

So easy that I wish I found this information sooner! To show: $('#selector').animate({ width: 'show' }); To hide: $('#selector').animate({ width: 'hide' }); Alternatively, you can also give a fixed width when showing it. Other than that, OMG you're done! Source jQuery animate() to hide and show elements by sliding left and right

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com0tag:blogger.com,1999:blog-3937429925313843721.post-819914585081720702011-10-11T09:43:00.001+11:002011-10-11T09:43:12.347+11:00

Ok, dynamic fields. Now we're digging into the dark depths of Django. Not something you can find in the documentation, well me anyway. There are a few posts online about it but some are fairly old, before the Django "newforms" were introduced. All that means is if you tried that code it won't work. This example shows us how to: Pass an argument to the form upon creation (user variable)

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com10tag:blogger.com,1999:blog-3937429925313843721.post-57845841427489993072011-10-11T09:12:00.001+11:002011-10-11T09:43:44.247+11:00

To get your select choices to be grouped, you'll have to do a little trickery. The resultant output in HTML is: <select id="id_choice" name="choice"> <optgroup label="Audio"> <option value="vinyl">Vinyl</option> <option value="cd">CD</option> </optgroup> <optgroup label="Video"> <option value="vhs">VHS Tape</option> <option value="dvd">DVD</option> </optgroup> <

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com0tag:blogger.com,1999:blog-3937429925313843721.post-22816709476698218722011-10-10T00:34:00.001+11:002011-10-10T00:34:21.553+11:00

As of patch v1.12, Blizzard allowed the game to be played without CD since they were offering the digital copy of it from their online store. -------------------------------------------------------------------------- - Patch 1.12 --------------------------------------------------------------------------      Downloadable Installer Support - If all required Diablo 2 '.MPQ'

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com0tag:blogger.com,1999:blog-3937429925313843721.post-17602098888878885052011-10-07T05:24:00.001+11:002011-10-07T05:27:56.093+11:00

Alright, I'm getting sleepy so this post is straight down to business. The early Android core libraries didn't come with very much in terms of HTTP and net socket support. The majority of the time they just said "use Apache's library, they're better". Android has caught up, but if you want to keep existing devices happy, you'll still need the Apache libraries. Under HttpClient 4.1.2 (GA),

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com0tag:blogger.com,1999:blog-3937429925313843721.post-40247762190025181172011-10-07T04:46:00.001+11:002011-10-07T04:46:52.568+11:00

This little snippet is a simple one, but it makes the user experience a whole lot better. Instead of implementing a new Activity/screen to enter in some text, just make it an AlertDialog() with an EditText view. final EditText txtUrl = new EditText(this); // Set the default text to a link of the Queen txtUrl.setHint("http://www.librarising.com/astrology/celebs/images2/QR/queenelizabethii.jpg"

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Well this certainly was harder than it should have been! The first three steps are pretty straight forward. Set up an ID for the activity result. private final int ACTIVITY_CHOOSE_PHOTO = 1; Mission complete! On with the next phase. Now we need something to trigger the "chooser" activity. Intent chooseFile = new Intent(Intent.ACTION_GET_CONTENT); chooseFile.setType("image/*");

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com1tag:blogger.com,1999:blog-3937429925313843721.post-13375808050333948862011-10-07T04:04:00.001+11:002011-10-07T04:04:25.889+11:00

To know when a WebView has finished loading, you can set a WebViewClient() handler and override the onPageFinished() method. ProgressDialog progressDialog = new ProgressDialog(ResultActivity.this); progressDialog.setMessage("Loading ..."); progressDialog.setCancelable(false); progressDialog.show(); WebView wv = new WebView(this); wv.setWebViewClient(new WebViewClient() { @Override public

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com3tag:blogger.com,1999:blog-3937429925313843721.post-1255299093223524232011-10-07T03:53:00.001+11:002011-10-07T03:54:49.467+11:00

I was getting sick of updating the version number on multiple places in my app when releasing updates; "About" screen, "version" variable and then in the Android manifest. Since the application manifest already had android:versionName, why not use it? try { MyActivity.GAME_VERSION = getPackageManager().getPackageInfo(this.getPackageName(), 0).versionName; } catch (NameNotFoundException e) {

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com0tag:blogger.com,1999:blog-3937429925313843721.post-33411096254044435992011-10-06T19:52:00.001+11:002011-10-06T20:03:54.082+11:00

When I was first debugging my image watermark code, I found it strange it kept running out of memory. Why!? You're doing it wrong! Firstly, I was trying to edit an immutable (non-editable) Bitmap. You need to generate a mutable copy of the bitmap before you can start modifying it. Secondly, my method was very heavy on memory usage. It involved loading the original immutable +4mega-pixel image

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com0tag:blogger.com,1999:blog-3937429925313843721.post-67368445452374763612011-10-06T18:09:00.001+11:002011-10-06T18:14:41.037+11:00

The following example shows you how to: download a file display the progress in a progress dialog use AsyncTask create a temporary file Like a BOSS I've used this code in my app Moustachify Everything. Initially, the app didn't display the progress bar and it was annoying because you never know if it was actually doing anything. it's a bit lengthy, but I assure you it's

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com0tag:blogger.com,1999:blog-3937429925313843721.post-87563841370631242992011-10-06T17:39:00.001+11:002011-10-06T17:39:16.721+11:00

What I set out to do was to overlay a logo over a photo and it was surprisingly easy with the use of the Matrix class.   No no, not him! I've littered the code with comments, but if you need any more information leave a comment. /** * Adds a watermark on the given image. */ public static Bitmap addWatermark(Resources res, Bitmap source) { int w, h; Canvas c; Paint paint; Bitmap bmp,

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com1tag:blogger.com,1999:blog-3937429925313843721.post-16666184015283077002011-10-06T17:00:00.001+11:002011-10-06T17:00:53.651+11:00

The last post was about receiving shared images. To send off images to another app, just use: Intent intent; File file; file = new File(absolute_filename); intent = new Intent(Intent.ACTION_SEND); intent.setType("image/jpeg"); intent.putExtra(Intent.EXTRA_STREAM, Uri.fromFile(file)); startActivity(Intent.createChooser(intent, "Share photo")); If you need to be particular about the mime

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com0tag:blogger.com,1999:blog-3937429925313843721.post-85710544926865224812011-10-06T16:45:00.001+11:002011-10-07T04:14:55.250+11:00

Photo gallery > Share > Your App. That'd be nice aye? Luckily, it's not that hard coz I've got sharing images or files using Intents working on my Mustachify Everything app quite nicely. A couple of tweaks required though. First, indicate that your app is willing to deal with image files coming from the "SEND" action. Using the Eclipse Android SDK, the AndroidManfest.xml config should look

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com0tag:blogger.com,1999:blog-3937429925313843721.post-86786267856129550902011-10-06T15:06:00.001+11:002011-10-06T15:06:51.821+11:00

It took me a while to figure out, but it's not ScaleType.FIT_XY that does the trick but FIT_CENTER. FIT_XY will stretch both width and height to fit the ImageView. Remember to use ImageView.setImageDrawable() or setImageBitmap() rather than setBackgroundDrawable(). Source: Android: Scale a Drawable or background image?

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com0tag:blogger.com,1999:blog-3937429925313843721.post-23199777756378542492011-10-06T14:51:00.001+11:002011-10-06T14:51:04.195+11:00

I was being driven insane this weird bug. The idea was simple enough. Open a stream to a HTTP URL. Use BitmapFactory to decode the stream. ... Profit. Worked pretty well in the emulator! But for some reason on the actual test devices, it would fail every single time. Mind boggling! After a few tests, I noticed something in the error logs. decoder->decode returned false The

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com0tag:blogger.com,1999:blog-3937429925313843721.post-42708890032241289032011-10-06T14:07:00.001+11:002011-10-06T14:07:50.861+11:00

Working with the Android emulator isn't as nice as working with a VMware virtual machine. You can't simply copy text from your notepad and paste it into the Android emulator. A nice way of getting around it is using the SMS functionality accessible via telnet. Assuming your emulator is running on port 5554, open up a command prompt window: telnet localhost 5554 sms send +12345 your

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com0tag:blogger.com,1999:blog-3937429925313843721.post-34366747605058766682011-10-01T23:38:00.001+10:002011-10-01T23:39:12.215+10:00

Sure it's designed for tablets and all, but I have a feeling Win8 might fall to the curse of the sucky "odd" release (Windows 3.1, Win98, XP and 7 were great! Win95, ME and Vista were terribad) With this whole shift to ribbons and metro, I think I'll stick to Windows 7 (unless there was a way to disable all those bells and whistles). You can grab a copy of it off Microsoft's official site.

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com0tag:blogger.com,1999:blog-3937429925313843721.post-54980855450553909422011-09-24T23:36:00.001+10:002011-09-24T23:50:15.227+10:00

If you want to protect your site from cross site request forgery, you'll have to enable the CSRF protection middleware. You can do that by adding "django.middleware.csrf.CsrfViewMiddleware" to your MIDDLEWARE_CLASSES setting. Once that's done, you have one of two ways to protect yourself. When rendering forms, you can either: use {{ form }} to print the form automatically or if

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com1tag:blogger.com,1999:blog-3937429925313843721.post-75960352081892739952011-09-11T13:10:00.001+10:002011-09-11T15:44:26.076+10:00

Man, I wish it were this easy in all languages and platforms! import android.webkit.MimeTypeMap; MimeTypeMap.getSingleton().getMimeTypeFromExtension(MimeTypeMap.getFileExtensionFromUrl(source.substring(source.lastIndexOf(".")))) Where source would be either a filename or URL. *same day edit* Wow, that's a first I've had to update a post a few hours after putting it up. There was a

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com0tag:blogger.com,1999:blog-3937429925313843721.post-82727201594768796312011-09-01T23:02:00.001+10:002011-09-01T23:02:10.052+10:00

This is something that I have to do every once in a while and can never remember the method. To save myself some time, I've written this here in hope that I can remember it next time. student_tuples = [ ('john', 'A', 15), ('jane', 'B', 12), ('dave', 'B', 10), ] # sort by age sorted(student_tuples, key = lambda student: student[2]) [('dave', 'B', 10), ('jane', 'B', 12), ('john', 'A', 15)

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com0tag:blogger.com,1999:blog-3937429925313843721.post-74904646316317403932011-08-21T04:02:00.001+10:002011-08-21T04:02:38.179+10:00

I thought I had the wrong HTML, the wrong file paths, disabled internet connection, setting a WebChromeClient and setting the HTML doc-type to be STRICT. In the end, I was just missing a vital call to enable it. Allow JavaScript in your WebView by calling: m_webview.getSettings().setJavaScriptEnabled(true); How embarassing =P Source: Using Android’s WebView, WebChromeClient and

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com0tag:blogger.com,1999:blog-3937429925313843721.post-29286374493515806112011-08-18T20:34:00.001+10:002011-08-18T20:35:07.189+10:00

An often useful feature is the ability to choose a file to fiddle with, may it be a photo, a music file or a text file. To kick it off, we need to start an activity with an intent of ACTION_GET_CONTENT. public class ActivityTestActivity extends Activity { final int ACTIVITY_CHOOSE_FILE = 1; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com0tag:blogger.com,1999:blog-3937429925313843721.post-9892764292411962272011-08-18T19:40:00.001+10:002011-08-18T19:40:38.774+10:00

Displaying custom HTML in a WebView is pretty easy, as explained in a post I made long ago in 2009. However, if you want to spruce it up with some images and CSS, you'll have to tweak it a little. Don't worry, it's not hard at all! Here is an example that's a bit more verbose. WebView wv = new WebView(this); StringBuilder html = new StringBuilder(); html.append("<html>"); html.append("<head>

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com2tag:blogger.com,1999:blog-3937429925313843721.post-38774974136805604012011-08-14T16:35:00.001+10:002011-08-14T16:36:50.022+10:00

If your device supports MTP (drag and drop using Windows Explorer), then it's likely you're wondering how to create a playlist without any extra software like Songbird, iTunes or Windows Media Player. I personally use Songbird to sync music to my Sansa c250, but for those who don't want to do that you can still use Windows Explorer to create playlists. Go to Windows Explorer and select the

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com0tag:blogger.com,1999:blog-3937429925313843721.post-8786957143187931232011-08-14T15:59:00.001+10:002011-08-14T16:01:15.047+10:00

Most new browsers now support the rounded borders CSS3 attribute. However, during the drafting period, it was all done differently. To properly support these browsers, you'll need some extra styling rules to make it work. The way I do it is less compatible but uses no hacks such as external .HTC files or browser specific CSS files because I dislike these solutions. The rounded borders should

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com0tag:blogger.com,1999:blog-3937429925313843721.post-33331018125604663652011-08-14T15:36:00.001+10:002011-08-14T15:37:04.621+10:00

If you've ever taken a quick glance at your Event Viewer, you may notice a shitload of messages from ati2mtag. To disable this ridiculous debug spamming, run: reg add HKLM\SYSTEM\CurrentControlSet\services\Atierecord /f /v eRecordEnable /d "0" /t REG_DWORD Reboot. You may have to do that every time you install a new driver. Source: Thousands of ati2mtag event 62464s (DVD_OV UVD

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com0tag:blogger.com,1999:blog-3937429925313843721.post-31703369506971943292011-08-12T23:44:00.001+10:002011-08-12T23:44:01.433+10:00

I'm not quite sure why this is disabled by default, but I never seem to get a ping response from my router when checking from work. When checking at home on the internal LAN, it works fine. I kept poking around the firewall settings but nothing was there. Then I stumbled across "Access Control" hidden away under "Management". Click on "ICMP" to enable it under the WAN column. That'll do the

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com0tag:blogger.com,1999:blog-3937429925313843721.post-46200520021695905892011-08-07T11:02:00.001+10:002011-08-07T11:03:10.474+10:00

This was a bit of a doozey for me, but very simple to find out. Go to a command prompt window and type "systeminfo" This will spit out a whole heap of info. The "Original Install Date" line is what you're after, somewhere near the top. If you've got a lot of patches installed, it'll flood that line off the screen. To prevent that, save the output to a file instead. Type "systeminfo >

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com0tag:blogger.com,1999:blog-3937429925313843721.post-68218169991400770882011-08-01T16:33:00.000+10:002011-10-13T09:32:49.420+11:00

Django forms are incredibly flexible, but they're also a little cumbersome when it comes to errors. The following example shows you that you can display an error for: a specific field a specific field from another field the form as a whole class EventForm(forms.ModelForm): class Meta: model = Event title = forms.CharField(required = True) lawyer = forms.CharField(

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com0tag:blogger.com,1999:blog-3937429925313843721.post-77495628525991805042011-07-31T22:34:00.001+10:002011-07-31T22:34:38.504+10:00

So one day I was reading an article on Engadget and noticed something on the right side column... Yep, Facebook activity! Creepy stuff... But I do vaguely remember taking the time to go through all my privacy options at once stage to disabling these sorta things. So yet again I ventured off searching through the labyrinth. When I finally found the settings for friends and third party...  

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com15tag:blogger.com,1999:blog-3937429925313843721.post-78745746869314044912011-07-28T16:33:00.000+10:002011-10-13T09:40:26.002+11:00

Holy cow, because Windows Vista/7 keeps eating up my space on C:, I had to look for what was eating up my space. To my surprise, "C:\Users\twig\.android\" was also taking up quite a bit of space also. So, I decided to move it. By default, the environment variable ANDROID_SDK_HOME points to "C:\Users\twig\" (Windows Vista/7, should be different for XP). To change yours (on Windows 7):

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com0tag:blogger.com,1999:blog-3937429925313843721.post-38265055150442586202011-07-24T15:41:00.001+10:002011-07-24T15:42:34.843+10:00

I forgot to set up a swap partition during setup, so figured I'd use a swap file instead, in case I messed up the Mac OSX boot partition. First, create an empty file. To know how much you need, see here. In this example, I'm using a 1GB (1024mb) swap file. Use the following command to make it: sudo mkdir /swapfile sudo dd if=/dev/zero of=/swapfile/1024mb.swap bs=1024 count=1048576 Now

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com0tag:blogger.com,1999:blog-3937429925313843721.post-58964097911866332612011-07-18T14:08:00.001+10:002011-07-18T14:09:08.937+10:00

You can set this manually in the editor by entering the command ":colorscheme murphy". Or you can automate it by editing "~/.vimrc" and adding a line "colorscheme murphy". This post seems too short, so here's a random GIF to go with it =)

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com0tag:blogger.com,1999:blog-3937429925313843721.post-37789582199951032222011-07-18T13:59:00.001+10:002011-07-18T13:59:18.908+10:00

For some obscure reason, my SSH login was taking a long time to verify. At first I didn't realise because I've been using my Android phone the whole time, but then I tried it on a LAN connection and it still had the same issue. The problem would go like this: Connect to OpenSSH server Enter in username Wait approximately 3 seconds Enter in password Wait approximately 5 seconds

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com1tag:blogger.com,1999:blog-3937429925313843721.post-52252388518131392172011-07-12T09:11:00.001+10:002011-07-12T09:12:37.428+10:00

Sometimes the easy part is pulling data out but the hard part is actually displaying it nicely. On some index pages, you can often categorise the list by the first letter of the name. This makes it a lot easier to find the information you're after. For example, displaying a list of apps in an index page. We use the built-in tag "regroup" to do this. {% regroup apps by name.0 as

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com0tag:blogger.com,1999:blog-3937429925313843721.post-6967859326087028112011-07-12T09:10:00.001+10:002011-07-12T09:10:35.132+10:00

Harley provides an awesome method for zero padding a number in a string. If the number is provided in string format: n = '4' print n.zfill(3) '004' And for integer format: n = 4 print '%03d' % n '004' Source Python: Nicest way to pad zeroes to string

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com0tag:blogger.com,1999:blog-3937429925313843721.post-43781381384078506972011-07-06T10:02:00.001+10:002011-07-06T10:02:47.207+10:00

While I'm on the topic of linking objects to comments, a handy filter to have is the ability to convert an object into the linked object. @register.filter def get_comment_object(comment): """ This is the reverse, it gets an object from the comment """ return comment.content_type.get_object_for_this_type(pk = comment.object_pk) To use it, just call: {{ comment|get_comment_object }}

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com0tag:blogger.com,1999:blog-3937429925313843721.post-48557990835816749042011-07-06T09:31:00.001+10:002011-07-06T09:31:53.435+10:00

For a long time I've been meaning to find a more convenient way to filter comments. I really disliked the way we had to retrieve them through a tag, which either retrieved "all or nothing". Sometimes it's necessary to retrieve comments from a subset of objects, such as comments for all blog posts "in category Cars". To do this efficiently with minimal changes to the database, we'll need a proxy

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com0tag:blogger.com,1999:blog-3937429925313843721.post-24873880431272234082011-07-03T13:28:00.001+10:002011-07-03T13:28:34.716+10:00

A lot of Android guides refer to a program called "adb", which comes from the Android software development kit. The development kit contains all tools and software required to begin creating your own Android applications. However, it is roughly 30mb in size and that's a whole heap of useless junk if you're only after "adb", which is 3 files and 718kb in size. Firstly, you'll need a program

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com0tag:blogger.com,1999:blog-3937429925313843721.post-31259869306724941832011-07-03T03:05:00.001+10:002011-07-03T03:05:30.000+10:00

The "switch to tab" feature is one of those improvements I believe didn't need to happen. It has our best interests at heart but does a sloppy job of helping out. What I sometimes do is load a dev page in one tab and keep it open. Then I make some changes and open a new tab to compare the changes. The "switch to tab" feature makes it impossible for me to do this! A "feature" that prevents me

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com0tag:blogger.com,1999:blog-3937429925313843721.post-31132267700519866452011-06-27T00:31:00.003+10:002011-07-24T16:10:10.068+10:00

To set up the wake on LAN feature, it requires a little bit of patience and testing. If you're looking to wake up your Linux machine, see the link in the "sources" below. The Windows sleeper Assuming that your machine is running Windows, you'll need to set some stuff on your network interface card (NIC). Configure NIC Open up the settings dialog for your network card Click on "

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com0tag:blogger.com,1999:blog-3937429925313843721.post-56147134691562443242011-06-26T22:18:00.001+10:002011-06-26T22:22:11.347+10:00

I'm not sure what sort of Linux gods I have angered but it seems they have it in for me. I was editing a secondary panel and moving the applets around when suddenly the system crashed. Fair enough, I'll just restart the thing and just try again. However, I wasn't lucky enough to get back into the system... The desktop froze at a black screen, showing only the faulty secondary panel. No

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com0tag:blogger.com,1999:blog-3937429925313843721.post-6904689138995605952011-06-23T09:37:00.001+10:002011-06-23T09:37:17.376+10:00

This was completely unknown to me until a certain much-used Firebug feature was removed. HTML preview feature available again in Firebug 1.8 They had pushed out a security update but removed the HTML preview feature which I use quite often due to my work with AJAX/JSON. Fuck, what was I to do? First, prevention is always better than a cure. Stop the automatic updates! Open up your

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com3tag:blogger.com,1999:blog-3937429925313843721.post-71214418123722097192011-06-22T09:33:00.001+10:002011-06-23T10:10:57.356+10:00

The problem I tried using the forms.DateTimeField and forms.DateField in my form and it kept coming up with "Enter a valid date/time.", despite the fact I given the custom "input_formats" in the constructor. Most of the search results bring you back to a post on StackOverflow called "Using Django time/date widgets in custom form". It's basically reusing the JS widget that you can access in the

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com0tag:blogger.com,1999:blog-3937429925313843721.post-25448237795795272222011-06-20T10:28:00.001+10:002011-06-20T10:28:21.073+10:00

So I dun goofed one of my workmate's git branches and had to remove one commit from the history. You may have noticed that this was buried under a whole stack of other commits... Normally, if you've made an accidental commit and realised straight away, you can just do: git reset HEAD^ This will pop off the latest commit but leave all of your changes to the files intact. Because this

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com0tag:blogger.com,1999:blog-3937429925313843721.post-59843396300474287102011-06-19T23:57:00.002+10:002011-07-06T10:08:03.176+10:00

I had to format a HP Mini and an EEE PC (both have no DVD drive) so the only option was to boot the little sorry excuse for a computer by USB. I stumbled upon this blog as one of the first hits, and amazingly it was very easy to get Windows booting up on USB. It supports Windows XP/2003/Vista/2008/7 and even Windows 8 beta! For best results, it's a good idea to use the target OS to create the

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com2tag:blogger.com,1999:blog-3937429925313843721.post-26067429112305590232011-06-19T22:35:00.001+10:002011-06-19T22:35:15.018+10:00

The rear view mirror should have something that limits the amount of light reflected to dim bright lights. That way we don't have to flip the rear view because of some knob with super high beams or one wonky misaligned light bulb that shines right into your eyes.

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com0tag:blogger.com,1999:blog-3937429925313843721.post-61935765819770435852011-06-19T22:25:00.001+10:002011-06-19T22:25:59.894+10:00

Somebody should invent balloon ribbon clips. This way we don't have to tie the damn things anymore. All you have to do is feed the ribbon through the clip, clamp it. Then create a loop and clip it again. The clamp should be reusable and require no tying.

twighttp://www.blogger.com/profile/12960052797537632822noreply@blogger.com0