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How do I test for an empty JavaScript object?
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ECMA 5+:
// because Object.keys(new Date()).length === 0;
// we have to do some additional check
Object.keys(obj).length === 0 && obj.constructor === Object
Note, though, that this creates an unnecessary array (the return value of keys).
Pre-ECMA 5:
function isEmpty(o...
Python - Check If Word Is In A String
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360
What is wrong with:
if word in mystring:
print 'success'
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How can I process each letter of text using Javascript?
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If the order of alerts matters, use this:
for (var i = 0; i < str.length; i++) {
alert(str.charAt(i));
}
If the order of alerts doesn't matter, use this:
var i = str.length;
while (i--) {
alert(str.charAt(i));
}
var str = 'This is my string';
function matters()...
How do you run multiple programs in parallel from a bash script?
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answered Jun 9 '10 at 10:07
psmearspsmears
20.2k44 gold badges3434 silver badges4747 bronze badges
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How can I read and parse CSV files in C++?
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304
If you don't care about escaping comma and newline,
AND you can't embed comma and newline in qu...
How to stop an app on Heroku?
...ectively takes all your app http-processes offline.
$ heroku ps:scale web=0
Scaling web processes... done, now running 0
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PHP function to generate v4 UUID
...P manual, you could use this:
function gen_uuid() {
return sprintf( '%04x%04x-%04x-%04x-%04x-%04x%04x%04x',
// 32 bits for "time_low"
mt_rand( 0, 0xffff ), mt_rand( 0, 0xffff ),
// 16 bits for "time_mid"
mt_rand( 0, 0xffff ),
// 16 bits for "time_hi_and...
How do I change the default port (9000) that Play uses when I execute the “run” command?
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409
Play 2.x
In Play 2, these are implemented with an sbt plugin, so the following instructions...
Rotated elements in CSS that affect their parent's height correctly
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Assuming that you want to rotate 90 degrees, this is possible, even for non-text elements - but like many interesting things in CSS, it requires a little cunning. My solution also technically invokes undefined behaviour according to the CSS 2 spec - so while ...
TypeScript: problems with type system
I'm just testing typescript in VisualStudio 2012 and have a problem with its type system. My html site has a canvas tag with the id "mycanvas". I'm trying to draw a rectangle on this canvas. Here's the code
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