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How to check if std::map contains a key without doing insert?
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Use my_map.count( key ); it can only return 0 or 1, which is essentially the Boolean result you want.
Alternately my_map.find( key ) != my_map.end() works too.
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HTML5 Pre-resize images before uploading
...le);
var ctx = canvas.getContext("2d");
ctx.drawImage(img, 0, 0);
var MAX_WIDTH = 800;
var MAX_HEIGHT = 600;
var width = img.width;
var height = img.height;
if (width > height) {
if (width > MAX_WIDTH) {
height *= MAX_WIDTH / width;
width = MAX_WIDTH;
}
} else {
if (height >...
Reserved keywords in JavaScript
... rather than just the top google hit.
http://developer.mozilla.org/En/Core_JavaScript_1.5_Reference/Reserved_Words
JScript 8.0:
http://msdn.microsoft.com/en-us/library/ttyab5c8.aspx
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typeof for RegExp
...checked before for (typeof t === 'object') : add either -> && !(_t instanceof RegExp) to this check or if possible perform Cleiton's check first. [tl;dr : it is also typeof object, just important if used in "if/else if" ...]
– sebilasse
Jun 16 '15 at...
process.env.NODE_ENV is undefined
... I don't think I missed anything but whenever I call the process.env.NODE_ENV the only value I get back is undefined. According to my research the default value should be 'development'. How is this value dynamically set and where is it set initially?
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endsWith in JavaScript
...l. https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/endsWith
T.J. Crowder - Creating substrings isn't expensive on modern browsers; it may well have been in 2010 when this answer was posted. These days, the simple this.substr(-suffix.length) === suffix approach...
What should I set JAVA_HOME environment variable on macOS X 10.6?
...cations that use shell scripts to configure their environment use the JAVA_HOME environment variable to start the correct version of Java, locate JRE JARs, and so on.
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How to colorize diff on the command line?
...n for (I want grep --color-like diff output).
– i336_
Jul 15 '17 at 4:36
@i336_ no updates unfortunately, if I get an...
How to display request headers with command line curl
...g one of the below options:
--trace-ascii - # stdout
--trace-ascii output_file.txt # file
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In Eclipse, what can cause Package Explorer “red-x” error-icon when all Java sources compile without
...ill find the problem is extra files with an underscore in some folders e.g __duplicatefile.java . To fix this, rightclick on the project and select : Show In > Navigator . Then delete the duplicate files with underscore and build your project.
– GraSim
May ...