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What's the need of array with zero elements?
...lloc(sizeof(*var) + extra);
You can access var->data with indices in [0, extra). Note that sizeof(struct something) will only give the size accounting for the other variables, i.e. gives data a size of 0.
It may be interesting also to note how the standard actually gives examples of mallocin...
Convert from List into IEnumerable format
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150
You don't need to convert it. List<T> implements the IEnumerable<T> interface so it ...
Iterating over each line of ls -l output
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edited Mar 2 '16 at 18:08
answered May 18 '10 at 18:50
R...
Replacing some characters in a string with another character
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340
echo "$string" | tr xyz _
would replace each occurrence of x, y, or z with _, giving A__BC___D...
What does -save-dev mean in npm install grunt --save-dev
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Rob
1,3131010 silver badges2121 bronze badges
answered Oct 7 '13 at 11:05
Andreas HultgrenAndreas Hultgren
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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_...
Fixing JavaScript Array functions in Internet Explorer (indexOf, forEach, etc.) [closed]
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220
Many use the MDC fallback implementations (eg. for indexOf). They're generally rigorously standa...
文本框输入十六进制，按字节通过蓝牙发送 · App Inventor 2 中文网
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有用户问：我想把文本框里输入的「ABCD」，以十六进制 0xAB 0xCD 这样的两个字节通过蓝牙发送出去，有什么转换方案吗？
目前蓝牙发送出去的都是 A、B、C、D 四个字母的 ASCII 码。
能实现，不需要拓展。 用到两样现成的东西：...
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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