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Is it possible to data-bind visible to the negation (“!”) of a boolean ViewModel property?
...'d like to use a property on my ViewModel to toggle which icon to display without creating a separate computed property of the inverse. Is this possible?
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Error: CUICatalog: Invalid asset name supplied: (null), or invalid scale factor : 2.000000
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Add symbolic breakpoint for [UIImage imageNamed:]
Add $arg3 == nil condition on Simulator, $r0 == nil condition on 32-bit iPhone, or $x2 == nil on 64-bit iPhone.
Run your application and see where debugger will stop.
P.S. Keep in mind this also happens if image name is empty string. You can ch...
How to remove focus without setting focus to another control?
I like my UIs to be intuitive; each screen should naturally and unobtrusively guide the user on to the next step in the app. Barring that, I strive to make things as confusing and confounding as possible.
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Where should virtualenvs be created?
... do:
mkvirtualenv djangoproject
and then later:
workon djangoproject
It's probably a bad idea to keep the virtualenv directory in the project itself, since you don't want to distribute it (it might be specific to your computer or operating system). Instead, keep a requirements.txt file using p...
Ember.js or Backbone.js for Restful backend [closed]
...lication open for long periods of time, perhaps all day, and interactions with the application's views or underlying data trigger deep changes in the view hierarchy. Ember is larger than Backbone, but thanks to Expires, Cache-Control this only matters on the the first load. After two days of daily u...
What should every JavaScript programmer know? [closed]
...re are some JavaScript language features that you should know to grok what it's doing and not get caught out, but which aren't immediately obvious to many people:
That object.prop and object['prop'] are the same thing (so can you please stop using eval, thanks); that object properties are always s...
Can I convert long to int?
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Just do (int)myLongValue. It'll do exactly what you want (discarding MSBs and taking LSBs) in unchecked context (which is the compiler default). It'll throw OverflowException in checked context if the value doesn't fit in an int:
int myIntValue = unc...
How to make child process die after parent exits?
...cess which spawns exactly one child process. Now when the parent process exits for whatever reason (normally or abnormally, by kill, ^C, assert failure or anything else) I want the child process to die. How to do that correctly?
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Gzip versus minify
...rce file is "common.js" The original file size is 73134 bytes. Minified, it came to 26232 bytes.
Original file:
-rwxrwxrwx 1 xxxxxxxx mkgroup-l-d 73134 Apr 13 11:41 common.js
Minified file:
-rwxr-xr-x 1 xxxxxxxx mkgroup-l-d 26232 Apr 30 10:39 common-min.js
Original file gzipped with -9 opti...
How can I beautify JavaScript code using Command Line?
I am writing a batch script in order to beautify JavaScript code. It needs to work on both Windows and Linux .
10 Answe...