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Most efficient way to determine if a Lua table is empty (contains no entries)?
... way to determine if a table is empty (that is, currently contains neither array-style values nor dict-style values)?
8 Ans...
jQuery OR Selector?
...d probably be to use the jQuery selector comma construct (which returns an array of found elements) in this fashion:
element = $('#someParentElement').find('.somethingToBeFound, .somethingElseToBeFound')[0];
which will return the first found element.
I use that from time to time to find either a...
Easy pretty printing of floats in python?
...you wrote your example in raw Python lists, but if you decide to use numpy arrays instead (which would be perfectly legit in your example, because you seem to be dealing with arrays of numbers), there is (almost exactly) this command you said you made up:
import numpy as np
np.set_printoptions(prec...
Angularjs $q.all
...ise);
});
return $q.all(promises);
}
My favorite way is to use Array#map:
Here is a demo plunker: http://plnkr.co/edit/KYeTWUyxJR4mlU77svw9?p=preview
UploadService.uploadQuestion = function(questions){
var promises = questions.map(function(question) {
return $http({
...
How to join multiple lines of file names into one with custom delimiter?
...IFS=$'\n'
files=($(ls -1))
IFS=,
list=${files[*]}
IFS=$saveIFS
Using readarray (aka mapfile) in Bash 4:
readarray -t files < <(ls -1)
saveIFS=$IFS
IFS=,
list=${files[*]}
IFS=$saveIFS
Thanks to gniourf_gniourf for the suggestions.
...
jQuery event handlers always execute in order they were bound - any way around this? [duplicate]
... can easily extend this to insert an item at any given position. It's just array manipulation. But since I haven't seen jQuery's source and don't want to miss out on any jQuery magic from happening, I normally add the handler using bind first, and then reshuffle the array.
// [name] is the name of ...
How do I access properties of a javascript object if I don't know the names?
...console.log(Object.keys(data)); // => ["Name", "Value"]
and loop with Array.prototype.forEach:
Object.keys(data).forEach(function (key) {
console.log(data[key]);
});
// => Logs "Property Name", 0
share
|...
Split large string in n-size chunks in JavaScript
...e) {
const numChunks = Math.ceil(str.length / size)
const chunks = new Array(numChunks)
for (let i = 0, o = 0; i < numChunks; ++i, o += size) {
chunks[i] = str.substr(o, size)
}
return chunks
}
share
...
Using Sinatra for larger projects via multiple files
...mon in Ruby. You don't "define" a class, you "reopen it". For example, the Array class is defined by the core library, but you can later "monkeypatch" by using class Array; def some_awesome_method; end and a) all previous Array functionality is preserved, and b) all Array instances will get your new...
A proper wrapper for console.log with correct line number?
...ces).
/// </summary>
/// <param name="args" type="Array">list of details to log, as provided by `arguments`</param>
/// <remarks>Includes line numbers by calling Error object -- see
/// * http://paulirish.com/2009/log-a-lightweight-wrapper-for-...