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Test if lists share any items in python
...a).isdisjoint(b)
If the elements you search are near the beginning of an array (e.g. it is sorted), the generator expression is favored, as the sets intersection method have to allocate new memory for the intermediary variables:
from timeit import timeit
>>> timeit('bool(set(a) & set...
Is there an “exists” function for jQuery?
... could also use the following. If there are no values in the jQuery object array then getting the first item in the array would return undefined.
if ( $('#myDiv')[0] ) { /* Do something */ }
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What does apply_filters(…) actually do in WordPress?
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Short explanation
apply_filters() interacts with the global $wp_filters array. Basically it just checks the array if the current filter (or hook) has an action(/callback function) attached and then calls it.
Long explanation
When you attach a callback/action to a filter or hook, then you just a...
Get list of a class' instance methods
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Note that under Ruby 1.9+ the array of method names are symbols, not strings.
– Phrogz
Jun 24 '11 at 14:08
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Testing two JSON objects for equality ignoring child order in Java
...pected value of {id:1}, this would still pass: {id:1,moredata:'x'}.)
Loose array ordering (e.g. ['dog','cat']==['cat','dog'])
In strict mode it behaves more like json-lib's test class.
A test looks something like this:
@Test
public void testGetFriends() {
JSONObject data = getRESTData("/frie...
Calling a JavaScript function named in a variable [duplicate]
...s of an object (in which case they are called methods) or even elements of arrays.
If you aren't choosing the object a function belongs to, it belongs to the global scope. In the browser, that means you're hanging it on the object named "window," which is where globals live.
Arrays and objects are i...
How can I delete a query string parameter in JavaScript?
...;
if (urlParts.length >= 2) {
// Get first part, and remove from array
var urlBase = urlParts.shift();
// Join it back up
var queryString = urlParts.join('?');
var prefix = encodeURIComponent(parameter) + '=';
var parts = queryString.split(/[&;]/g);
// Revers...
List of installed gems?
...s a hash of the gems, where the key is the gem's name, and the value is an array of the gem specifications. The value is an array of the instances of that gem that is installed, sorted by the version number.
That makes it possible to do things like:
my_local_gems = local_gems()
my_local_gems['act...
Chrome sendrequest error: TypeError: Converting circular structure to JSON
...r arg! it allows debugging down circular issues. in my case i had a jquery array where i thougth to have a normal array. they both look similar in debug print mode. About the IEFE, I see them frequently used in places where there is absolutely no need for them and agree with Shawn and Bergi that thi...
Is there a bash command which counts files?
...o enable nullglob so that you don't get the literal *.log in the $logfiles array if no files match. (See How to "undo" a 'set -x'? for examples of how to safely reset it.)
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