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Getters \ setters for dummies
...s when a property is accessed, like keeping numbers in range, reformatting strings, triggering value-has-changed events, updating relational data, providing access to private properties, and more.
The examples below show the basic syntax, though they simply get and set the internal object value wit...
In Django, how does one filter a QuerySet with dynamic field lookups?
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Just a quick gotcha heads-up: make sure the strings in the kwargs are of type str not unicode, else filter() will grumble.
– Steve Jalim
Apr 4 '11 at 9:30
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Convert UTC datetime string to local datetime
I've never had to convert time to and from UTC. Recently had a request to have my app be timezone aware, and I've been running myself in circles. Lots of information on converting local time to UTC, which I found fairly elementary (maybe I'm doing that wrong as well), but I can not find any informat...
Sublime Text 2: How to delete blank/empty lines
...n't need the ?, as a * also matches zero occurences and \s* will match the extra '\r' when for example editing windows text in a linux environment, so ^\s*$ does the trick.
– drevicko
Nov 1 '14 at 9:41
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Create tap-able “links” in the NSAttributedString of a UILabel?
...st one is easy. Starting from iOS 6 UILabel supports display of attributed strings. All you need to do is to create and configure an instance of NSMutableAttributedString:
NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc] initWithString:@"String with a link" attribute...
Extract substring in Bash
...ut -d'_' -f 2
More generic:
INPUT='someletters_12345_moreleters.ext'
SUBSTRING=$(echo $INPUT| cut -d'_' -f 2)
echo $SUBSTRING
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Calling dynamic function with dynamic number of parameters [duplicate]
...ith arbitrary functions, pass the function itself instead of its name as a string:
function dispatch(fn, args) {
fn = (typeof fn == "function") ? fn : window[fn]; // Allow fn to be a function object or the name of a global function
return fn.apply(this, args || []); // args is optional, u...
Javascript - removing undefined fields from an object [duplicate]
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To remove undefined props in an object we use like this
JSON.parse(JSON.stringify(obj));
Output: {a: 1, c: 3}
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How to move a model between two Django apps (Django 1.7)
...ion
Point all of the FK references to the new model. If you aren't using string references, move the old model to the bottom of models.py (DON'T remove it) so it doesn't compete with the imported class.
Run makemigrations but DON'T wrap anything in state_operations (the FK changes should actually ...
No output to console from a WPF application?
...anagedCodeSecurity]
public static class ConsoleManager
{
private const string Kernel32_DllName = "kernel32.dll";
[DllImport(Kernel32_DllName)]
private static extern bool AllocConsole();
[DllImport(Kernel32_DllName)]
private static extern bool FreeConsole();
[DllImport(Kern...