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Socket.io rooms difference between broadcast.to and sockets.in
...ch are connected to the room1 */
io.sockets.in('room1').emit('function', {foo:bar});
ii) socket.broadcast.to().emit();
io.sockets.on('connection', function (socket) {
socket.on('function', function(data){
/* Broadcast to room1 except the sender. In other word,
It broadc...
What is an 'endpoint' in Flask?
... flask import Flask, url_for
app = Flask(__name__)
# We can use url_for('foo_view') for reverse-lookups in templates or view functions
@app.route('/foo')
def foo_view():
pass
# We now specify the custom endpoint named 'bufar'. url_for('bar_view') will fail!
@app.route('/bar', endpoint='bufar'...
Converting any string into camel case
...f anyone is using lodash, there is a _.camelCase() function.
_.camelCase('Foo Bar');
// → 'fooBar'
_.camelCase('--foo-bar--');
// → 'fooBar'
_.camelCase('__FOO_BAR__');
// → 'fooBar'
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What is JSONP, and why was it created?
...Without JSONP, this might return some basic JavaScript object, like so:
{ foo: 'bar' }
However, with JSONP, when the server receives the "callback" parameter, it wraps up the result a little differently, returning something like this:
mycallback({ foo: 'bar' });
As you can see, it will now inv...
How do I tell if a regular file does not exist in Bash?
...amation point (similar to many other languages). Try this:
if [ ! -f /tmp/foo.txt ]; then
echo "File not found!"
fi
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How to check if object has any properties in JavaScript?
...can have non–enumerable own properties, e.g. Object.defineProperty(obj, 'foo', {enumerable:false, value:'foo'}).
– RobG
Jun 4 '14 at 3:35
...
HTML5 Video Dimensions
...
<video id="foo" src="foo.mp4"></video>
var vid = document.getElementById("foo");
vid.videoHeight; // returns the intrinsic height of the video
vid.videoWidth; // returns the intrinsic width of the video
Spec: https://html.sp...
How to output in CLI during execution of PHP Unit tests?
...est output using the built-in methods like:
$this->expectOutputString('foo');
However, sometimes it's helpful to be naughty and see one-off/temporary debugging output from within your test cases. There is no need for the var_dump hack/workaround, though. This can easily be accomplished by sett...
In Java, are enum types inside a class static?
...r class they'd break the enum guarantee -
e.g. if you had
public class Foo {
private enum Bar {
A, B, C;
}
}
For the enum values to properly act as constants, (psuedocode, ignoring access restrictions)
Bar b1 = new Foo().A
Bar b2 = new Foo().A
b1 and b2 would have to be the s...
Detect when an image fails to load in Javascript
...eNotFound() {
alert('That image was not found.');
}
testImage("http://foo.com/bar.jpg");
And my sympathies for the jQuery-resistant boss!
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