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Get name of caller function in PHP?
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edited Nov 25 '15 at 18:16
Community♦
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django admin - add custom form fields that are not part of the model
I have a model registered in the admin site. One of its fields is a long string expression. I'd like to add custom form fields to the add/update page of this model in the admin that based on these fields values I will build the long string expression and save it in the relevant model field.
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How to check whether a variable is a class or not?
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edited Apr 16 '16 at 23:23
Eric Leschinski
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How to redirect to a 404 in Rails?
...'d like to 'fake' a 404 page in Rails. In PHP, I would just send a header with the error code as such:
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How to set child process' environment variable in Makefile
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edited Feb 2 at 22:56
rado
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Literal suffix for byte in .NET?
...hort way like floats or doubles? I mean like 5f and 5d . Sure I could write byte x = 5 , but that's a bit inconsequential if you use var for local variables.
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Remove last item from array
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Use splice(startPosition, deleteCount)
array.splice(-1,1)
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Remove a string from the beginning of a string
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Plain form, without regex:
$prefix = 'bla_';
$str = 'bla_string_bla_bla_bla';
if (substr($str, 0, strlen($prefix)) == $prefix) {
$str = substr($str, strlen($prefix));
}
Takes: 0.0369 ms (0.000,036,954 seconds)
And with:
$prefix...
Reverse / invert a dictionary mapping
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For Python 2.7.x
inv_map = {v: k for k, v in my_map.iteritems()}
For Python 3+:
inv_map = {v: k for k, v in my_map.items()}
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What are 'get' and 'set' in Swift?
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That's actually explained right before the code:
In addition to simple properties that are stored, properties can have a getter and a setter.
class EquilateralTriangle: NamedShape {
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When some other class wants to get that perimeter variable, they do this:
let someVar =...