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Why does direction of index matter in MongoDB?
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MongoDB concatenates the compound key in some way and uses it as the key in a BTree.
When finding single items - The order of the nodes in the tree is irrelevant.
If you are returning a range of nodes - The elements close to each other will be dow...
How can I profile Python code line-by-line?
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Here's the decorator I wrote: gist.github.com/kylegibson/6583590. If you're running nosetests, be sure to use the -s option so stdout is printed immediately.
– Kyle Gibson
Sep 16 '13 at 17:14
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Find which commit is currently checked out in Git
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You have at least 5 different ways to view the commit you currently have checked out into your working copy during a git bisect session (note that options 1-4 will also work when you're not doing a bisect):
git show.
git log -1.
Bash prompt.
git status.
git bisect visua...
Difference between CC, gcc and g++?
What are the difference between the 3 compilers CC, gcc, g++ when compiling
C and C++ code in terms of assembly
code generation, available libraries, language features, etc.?
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Parsing JSON with Unix tools
... tools specifically designed for the purpose of manipulating JSON from the command line, and will be a lot easier and more reliable than doing it with Awk, such as jq:
curl -s 'https://api.github.com/users/lambda' | jq -r '.name'
You can also do this with tools that are likely already installed o...
How does git compute file hashes?
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8ab686eafeb1f44702738c8b0f24f2567c36da6d
Source: http://alblue.bandlem.com/2011/08/git-tip-of-week-objects.html
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Understanding Fragment's setRetainInstance(boolean)
...t it to work I'm forced to stop the task, save state, and resume when user comes back. So all in all, this is just a quick way to help with rotation, but otherwise useless in general.
– TWiStErRob
May 5 '15 at 15:58
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How to swap files between windows in VIM?
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There are a few useful commands built in which give you a certain amount of control, but it's not comprehensive. The main ones are:
Ctrl-W, r (i.e. hold CTRL, press W, release CTRL, press r) - which rotates the windows (The first window becomes ...