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How to list all installed packages and their versions in Python?
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Ashwini ChaudharyAshwini Chaudhary
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Most efficient way to concatenate strings in JavaScript?
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edited Apr 24 '18 at 9:20
answered May 22 '13 at 16:16
Ja...
Getting “Warning! PATH is not properly set up” when doing rvm use 2.0.0 --default
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edited Oct 15 '16 at 10:43
Arslan Ali
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Remove not alphanumeric characters from string
...ut string:
input.replace(/\W/g, '')
Note that \W is the equivalent of [^0-9a-zA-Z_] - it includes the underscore character. To also remove underscores use e.g.:
input.replace(/[^0-9a-z]/gi, '')
The input is malformed
Since the test string contains various escaped chars, which are not alphanum...
When to use Preorder, Postorder, and Inorder Binary Search Tree Traversal strategies
...ng tree as an example.
The root of the tree is 7, the left most node is 0, the right most node is 10.
Pre-order traversal:
Summary: Begins at the root (7), ends at the right-most node (10)
Traversal sequence: 7, 1, 0, 3, 2, 5, 4, 6, 9, 8, 10
In-order traversal:
Summary: Begins at the lef...
Select first occurring element after another element
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#many .more.selectors h4 + p { ... }
This is called the adjacent sibling selector.
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cancelling queued performSelector:afterDelay calls
...lector
[self performSelector:@selector(mySel:) withObject:nil afterDelay:5.0];
// cancel the above call (and any others on self)
[NSObject cancelPreviousPerformRequestsWithTarget:self];
See apple docs, it's right at the end of the performSelector:withObject:afterDelay: description.
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How do .gitignore exclusion rules actually work?
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/a/b/c/*
!foo
Seems to work for me (git 1.7.0.4 on Linux). The * is important as otherwise you're ignoring the directory itself (so git won't look inside) instead of the files within the directory (which allows for the exclusion).
Think of the exclusions as saying "bu...
jQuery UI slider Touch & Drag/Drop support on Mobile devices
...ext/javascript" src="//cdnjs.cloudflare.com/ajax/libs/jqueryui-touch-punch/0.2.3/jquery.ui.touch-punch.min.js"></script>
Note: Better give this repo a star on Github.
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Select between two dates with Django
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suhailvs
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answered Oct 18 '10 at 20:46
Daniel RosemanDaniel Roseman
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