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Can I prevent the Firefox developer tools network panel from clearing on page reload?
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From Firefox 31 onwards you can use the "Enable persistent logs" setting to prevent the Network Monitor from clearing the list on reload.
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defaultdict of defaultdict?
... d[Key_doesnt_exist] will be defaultdict(int).
If you try to access a key from this last defaultdict i.e. d[Key_doesnt_exist][Key_doesnt_exist] it will return 0, which is the return value of the argument of the last defaultdict i.e. int().
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What algorithms compute directions from point A to point B on a map?
...s work, with a couple of modifications:
Instead of doing Dijkstra's once from source to dest, you start at each end, and expand both sides until they meet in the middle. This eliminates roughly half the work (2*pi*(r/2)^2 vs pi*r^2).
To avoid exploring the back-alleys of every city between your so...
What's the difference between the various methods to get a Context?
...en it comes to Contexts in Android, but you can piece together a few facts from various sources.
This blog post on the official Google Android developers blog was written mostly to help address memory leaks, but provides some good information about contexts as well:
In a regular Android applica...
What's the difference between console.dir and console.log?
...ence with arrays (e.g., console.dir([1,2,3])) which are logged differently from normal objects:
> console.log([1,2,3])
[1, 2, 3]
> console.dir([1,2,3])
* Array[3]
0: 1
1: 2
2: 3
length: 3
* __proto__: Array[0]
concat: function concat() { [native code] }
co...
SVN - Checksum mismatch while updating
When I try to update some files from Subversion, I get the error:
15 Answers
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Combining multiple git repositories
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The funky filter-branch command is from git's filter-branch man pages. You should say that as: a) it should be attributed correctly b) I won't run such a command just because someone, even with high reputation, posted it on StackOverflow. Knowing it's from man...
Remove all special characters except space from a string using JavaScript
I want to remove all special characters except space from a string using JavaScript.
11 Answers
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How do I make a matrix from a list of vectors in R?
Goal: from a list of vectors of equal length, create a matrix where each vector becomes a row.
6 Answers
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Cannot add or update a child row: a foreign key constraint fails
... So I need to do to another SQL statement to get the userid from table1?
– Tom
Feb 15 '11 at 15:25
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