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How to get a pixel's x,y coordinate color from an image?
... 0, img.width, img.height);
After that, when a user clicks, use event.offsetX and event.offsetY to get the position. This can then be used to acquire the pixel:
var pixelData = canvas.getContext('2d').getImageData(event.offsetX, event.offsetY, 1, 1).data;
Because you are only grabbing one pixe...
How to get the current time in milliseconds from C in Linux?
...presentation of time is not relevant to or effected by timezone itself, so setting tz param of gettimeofday() is not necessary, since it won't make any difference.
And, according to man page of gettimeofday(), the use of the timezone structure is obsolete, thus the tz argument should normally be sp...
Unix tail equivalent command in Windows Powershell
I have to look at the last few lines of a large file (typical size is 500MB-2GB). I am looking for a equivalent of Unix command tail for Windows Powershell. A few alternatives available on are,
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How can I use a file in a command and redirect output to the same file without truncating it?
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One liner alternative - set the content of the file as variable:
VAR=`cat file_name`; echo "$VAR"|grep -v 'seg[0-9]\{1,\}\.[0-9]\{1\}' > file_name
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Split data frame string column into multiple columns
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What's better at freeing memory with PHP: unset() or $var = null
... interesting to know if one is better than the other. I have been using unset() for most of my coding, but I've recently looked through a few respectable classes found off the net that use $var = null instead.
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Remove non-ascii character in string
... least IE 11). It fails with error: SCRIPT5021: Invalid range in character set
– Andrey Sorich
May 19 '19 at 6:51
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How to obtain a Thread id in Python?
...emantics. Multiple threads may be given the same name. The initial name is set by the constructor."
– drevicko
Dec 4 '12 at 6:10
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UnboundLocalError on local variable when reassigned after first use
The following code works as expected in both Python 2.5 and 3.0:
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How do I iterate through children elements of a div using jQuery?
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