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What's the best way to set a single pixel in an HTML5 canvas?
...e
var d = id.data; // only do this once per page
d[0] = r;
d[1] = g;
d[2] = b;
d[3] = a;
myContext.putImageData( id, x, y );
Use fillRect() to draw a pixel (there should be no aliasing issues):
ctx.fillStyle = "rgba("+r+","+g+","+b+","+(a/255)+")";
ctx.fillRect...
How to add text to a WPF Label in code?
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answered Feb 4 '11 at 20:14
Daniel A. WhiteDaniel A. White
170k4242 gold badges334334 silver badges403403 bronze badges
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Linux: compute a single hash for a given folder & contents?
...d xargs. One possible command would be
find path/to/folder -type f -print0 | sort -z | xargs -0 sha1sum | sha1sum
And, finally, if you also need to take account of permissions and empty directories:
(find path/to/folder -type f -print0 | sort -z | xargs -0 sha1sum;
find path/to/folder \( -typ...
ggplot2 plot without axes, legends, etc
...ve a lot of this stuff using element_blank:
dat <- data.frame(x=runif(10),y=runif(10))
p <- ggplot(dat, aes(x=x, y=y)) +
geom_point() +
scale_x_continuous(expand=c(0,0)) +
scale_y_continuous(expand=c(0,0))
p + theme(axis.line=element_blank(),axis.text.x=element_...
What is the right way to POST multipart/form-data using curl?
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edited May 20 '15 at 18:35
evandrix
5,36333 gold badges2525 silver badges3232 bronze badges
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What is the canonical way to determine commandline vs. http execution of a PHP script?
...argc'] , but it turns out this is populated, even when using the 'Apache 2.0 Handler' server API.
5 Answers
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Generating all permutations of a given string
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607
public static void permutation(String str) {
permutation("", str);
}
private static void...
Call a global variable inside module
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410
You need to tell the compiler it has been declared:
declare var bootbox: any;
If you have bet...
VIM ctrlp.vim plugin: how to rescan files?
...d before. What I did not like about Command-T is that it would take about 20-30 seconds to rescan files when it is invoked for the first time after starting vim.
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How to remove specific element from an array using python
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204
You don't need to iterate the array. Just:
>>> x = ['ala@ala.com', 'bala@bala.com']
&...