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List of foreign keys and the tables they reference
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hakamairi
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answered Nov 13 '09 at 15:46
Vincent MalgratVincen...
How to plot two histograms together in R?
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JohnJohn
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8
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Do you have to restart apache to make re-write rules in the .htaccess take effect?
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94
A restart is not required for changes to .htaccess. Something else is wrong.
Make sure your .h...
Build an ASCII chart of the most commonly used words in a given text [closed]
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It IS not worth it
– user216441
Jul 4 '10 at 6:18
4
LabVIEW's very happy...
ERROR:'keytool' is not recognized as an internal or external command, operable program or batch file
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edited Jan 19 at 19:44
Yennefer
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answered J...
How to check if hex color is “too black”?
...= 0.2126 * r + 0.7152 * g + 0.0722 * b; // per ITU-R BT.709
if (luma < 40) {
// pick a different colour
}
EDIT
Since May 2014 tinycolor now has a getBrightness() function, albeit using the CCIR601 weighting factors instead of the ITU-R ones above.
EDIT
The resulting luma value range is ...
map function for objects (instead of arrays)
...yObject[key] *= 2;
});
console.log(myObject);
// => { 'a': 2, 'b': 4, 'c': 6 }
But you could easily iterate over an object using for ... in:
var myObject = { 'a': 1, 'b': 2, 'c': 3 };
for (var key in myObject) {
if (myObject.hasOwnProperty(key)) {
myObject[key] *= 2;
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Why is it common to put CSRF prevention tokens in cookies?
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4 Answers
4
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Single quotes vs. double quotes in C or C++
...e that in C, the type of a character literal is int, that is sizeof 'a' is 4 in an architecture where ints are 32bit (and CHAR_BIT is 8), while sizeof(char) is 1 everywhere.
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Print a string as hex bytes?
...have this string: Hello world !! and I want to print it using Python as 48:65:6c:6c:6f:20:77:6f:72:6c:64:20:21:21 .
13 A...