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git reset --hard HEAD leaves untracked files behind
...rking copy.
If you need to reset the whole repository to master including all git submodules, run this script:
git reset --hard HEAD
git clean -f -d
git checkout master
git fetch origin master
git reset --hard origin/master
git pull
git submodule update
git submodule update --init --recursive
git ...
What is the difference between $(command) and `command` in shell programming?
... for portability issues it is recommended to use backticks for non-nested calls. $(...) needs a recursive parser but this was not used with ksh86 that introduced the feature. Check in-ulm.de/~mascheck/various/cmd-subst for a list of correct implementations. A conforming shell needs to support all c...
How big can a MySQL database get before performance starts to degrade
...us first on your indexes, then have a server admin look at your OS, and if all that doesn't help it might be time to implement a master/slave configuration.
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What's the best visual merge tool for Git? [closed]
...ss-platform (UNIX/Linux, OSX, Windows) diff/merge tool.
Here's how to install it on:
Ubuntu
Mac
Windows: "The recommended version of Meld for Windows is the most recent release, available as an MSI from https://meldmerge.org"
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How do you performance test JavaScript code?
... a good way to get numbers, but in my experience, perceived performance is all that matters to the user/client. For example, we had a project with an Ext accordion that expanded to show some data and then a few nested Ext grids. Everything was actually rendering pretty fast, no single operation too...
PHP Get all subdirectories of a given directory
How can I get all sub-directories of a given directory without files, . (current directory) or .. (parent directory)
and then use each directory in a function?
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What does jquery $ actually return?
...you should pass the function, I don't see any information on what it actually returns .
9 Answers
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How do SQL EXISTS statements work?
...hen tries to match this 'true/false' condition with outerquery." is what really cleared it up for me, I keep thinking that's how subqueries work (and many times they do), but what you said makes sense because the subquery relies on the outer query and therefore must be executed once per row
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What is the difference between a .xib file and a .storyboard?
...ated .xib with it. Storyboard achieves two things:
.storyboard is essentially one single file for all your screens in the app and it shows the flow of the screens. You can add segues/transitions between screens, this way. So, this minimizes the boilerplate code required to manage multiple screens....
Ternary operator is twice as slow as an if-else block?
...several additional registers available, and each register is 64-bits. This allows the X64 JIT to perform the inner loop entirely using registers aside from loading i from the array, while the X86 JIT places several stack operations (memory access) in the loop.
value is a 64-bit integer, which requir...