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Django Passing Custom Form Parameters to Formset
...le }} for example, I get empty form tables, ie. no fields are printed. Any ideas?
– Paolo Bergantino
Apr 19 '09 at 7:01
...
Checking from shell script if a directory contains files
...; ((${#f}))
This trick is 100% bash and invokes (spawns) a sub-shell. The idea is from Bruno De Fraine and improved by teambob's comment.
files=$(shopt -s nullglob dotglob; echo your/dir/*)
if (( ${#files} ))
then
echo "contains files"
else
echo "empty (or does not exist or is a file)"
fi
...
Unique Key constraints for multiple columns in Entity Framework
... the best one but it requires some time to do it. I will just show you the idea behind it:
In this link http://code.msdn.microsoft.com/CSASPNETUniqueConstraintInE-d357224a
you can find the code for unique key data annotation:
[UniqueKey] // Unique Key
public int FirstColumn { get; set;}
[Uni...
What does the ??!??! operator do in C?
...eys:
{ | } ~
The trigraphs were defined to fix a specific problem. The idea was that C programs could use the ASCII subset found on the ASR-33 and in other environments missing the high ASCII values.
Your example is actually two of ??!, each meaning |, so the result is ||.
However, people ...
How to properly add include directories with CMake
... dependency on the library) ? It's a growing project and I quite dread the idea of adding a header to all the dependencies when I add one in the root library.
– Matthieu M.
Dec 4 '12 at 13:13
...
Git submodule update
...ur main project refering to a new version of said submodule.
But the main idea remains: referencing specific components which:
have their own lifecycle
have their own set of tags
have their own development
The list of specific commits you are refering to in your main project defines your confi...
Why are global variables evil? [closed]
...
Using globals is a horrible idea, one reason might be the inability to properly test functions that update some arbitrary dictionary that exists "somewhere". A codebase with globals cannot be actually proved functional.
– Tomasz So...
Move the mouse pointer to a specific position?
...Lock, and hitting escape will break it. From my brief read-up, I think the idea is that it locks the mouse to one location, and reports motion events similar to click-and-drag events.
Here's the release documentation:FireFox: https://developer.mozilla.org/en-US/docs/Web/API/Pointer_Lock_APIChrome: ...
Python idiom to return first item or None
... in an if check. Just simply say
if list:
Additionally, it's a very Bad Idea to assign to variables that overlap with reserved words. "list" is a reserved word in Python.
So let's change that to
some_list = get_list()
if some_list:
A really important point that a lot of solutions here miss is...
Cannot delete directory with Directory.Delete(path, true)
... issue in their context and we shouddnt be growing a big hairy throw every idea at the problem (with retries and exception swallowing) and hoping for a good outcome.
– Ruben Bartelink
Feb 8 '12 at 8:48
...