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Why does parseInt yield NaN with Array#map?
...,'2','3'].map(function(num) { return parseInt(num, 10); });
or with ES2015+ syntax:
['1','2','3'].map(num => parseInt(num, 10));
(In both cases, it's best to explicitly supply a radix to parseInt as shown, because otherwise it guesses the radix based on the input. In some older browsers, a l...
Change date of git tag (or GitHub Release based on it)
...it checkout SHA1_OF_PAST_COMMIT
git tag -m"Retroactively tagging version 1.5" v1.5
And while that's perfectly usable, it has the effect of putting your tags out of chronological order which can screw with build systems that look for the "latest" tag. But have no fear. Linus thought of everythi...
Unrecognized attribute 'targetFramework'. Note that attribute names are case-sensitive
...
answered May 17 '12 at 5:53
MerenzoMerenzo
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How to base64 encode image in linux bash / shell
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155
You need to use cat to get the contents of the file named 'DSC_0251.JPG', rather than the filen...
Catching error codes in a shell pipe
...s:
tmp=${TMPDIR:-/tmp}/mine.$$
trap 'rm -f $tmp.[12]; exit 1' 0 1 2 3 13 15
...if statement as before...
rm -f $tmp.[12]
trap 0 1 2 3 13 15
The first trap line says 'run the commands 'rm -f $tmp.[12]; exit 1' when any of the signals 1 SIGHUP, 2 SIGINT, 3 SIGQUIT, 13 SIGPIPE, or 15 SIGTERM occur, ...
How to overcome TypeError: unhashable type: 'list'
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56
As indicated by the other answers, the error is to due to k = list[0:j], where your key is conv...
What is q=0.5 in Accept* HTTP headers?
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5
@TimCooper Why not just have the languages in order or preference? The value doesn't seem to matter, other than it being larger than others....
Programmatically Lighten or Darken a hex color (or rgb, and blend colors)
... standard Hex colors in the form of strings. For example: "#AA6622" or "#bb551144".
Auto-detects and accepts standard RGB colors in the form of strings. For example: "rgb(123,45,76)" or "rgba(45,15,74,0.45)".
Shades colors to white or black by percentage.
Blends colors together by percentage.
Does H...
What does upstream mean in nginx?
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165
It's used for proxying requests to other servers.
An example from http://wiki.nginx.org/LoadBal...