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How do I access the request object or any other variable in a form's clean() method?
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The answer by Ber - storing it in threadlocals - is a very bad idea. There's absolutely no reason to do it this way.
A much better way is to override the form's __init__ method to take an extra keyword argument, request. This stores the request in the form, where it's required, and from...
Hidden features of Scala
...gher-kinded types)
Without this feature you can, for example, express the idea of mapping a function over a list to return another list, or mapping a function over a tree to return another tree. But you can't express this idea generally without higher kinds.
With higher kinds, you can capture the ...
“Unsafe JavaScript attempt to access frame with URL…” error being continuously generated in Chrome w
...and it seemed to work! but it said it wasn't able to load my profile...any idea how to set that flag from within the app, or set it to default to that?
– Neil Sarkar
Jul 28 '10 at 22:50
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string.charAt(x) or string[x]?
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// charAt Implementation
"Test String1".charAt(6)
It used to be a bad idea to use brackets, for these reasons (Source):
This notation does not work in IE7.
The first code snippet will return
undefined in IE7. If you happen to use
the bracket notation for strings all
over your code ...
C: Run a System Command and Get Output? [duplicate]
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Redirecting stderr to stdout may be a good idea, so you catch errors.
– user25148
Mar 14 '09 at 17:12
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How to echo shell commands as they are executed
... Not many votes for this answer. Is there a reason it's a bad idea? Worked for me, and seems to be exactly what I'm looking for...
– fru1tbat
Jul 22 '14 at 14:03
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vim deleting backward tricks
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haha, i want this and I have no idea how to describe it in Google. So lucky that i scroll down =))
– Thai Tran
Nov 29 '16 at 0:14
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Good Haskell source to read and learn from [closed]
...s an open source, source code management system. It should give you a nice idea for Haskell.
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Why should I use Deque over Stack?
...end up committing to a specific concrete class, which isn't usually a good idea.
Also as pointed out in the comments, Stack and Deque have reverse iteration orders:
Stack<Integer> stack = new Stack<>();
stack.push(1);
stack.push(2);
stack.push(3);
System.out.println(new ArrayList<&g...
Base64 length calculation?
..., rounding errors etc. They are just not necessary.
For this it is a good idea to remember how to perform the ceiling division: ceil(x / y) in doubles can be written as (x + y - 1) / y (while avoiding negative numbers, but beware of overflow).
Readable
If you go for readability you can of course ...