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How do I create a dynamic key to be added to a JavaScript object variable [duplicate]
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Square brackets:
jsObj['key' + i] = 'example' + 1;
In JavaScript, all arrays are objects, but not all objects are arrays. The primary difference (and one that's pretty hard to mimic with straight JavaScript and plain objects) is that array instances maintain the length property so that it refle...
How to find and return a duplicate value in array
arr is array of strings:
20 Answers
20
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How to extract img src, title and alt from html using php? [duplicate]
..._all match the regexp in all the $html string and output everything as
an array in $result. "i" option is used to make it case insensitive */
preg_match_all('/<img[^>]+>/i',$html, $result);
print_r($result);
Array
(
[0] => Array
(
[0] => <img src="/Conte...
NumPy: function for simultaneous max() and min()
numpy.amax() will find the max value in an array, and numpy.amin() does the same for the min value. If I want to find both max and min, I have to call both functions, which requires passing over the (very big) array twice, which seems slow.
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jQuery.inArray(), how to use it right?
First time I work with jQuery.inArray() and it acts kinda strange.
20 Answers
20
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Declare a constant array
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An array isn't immutable by nature; you can't make it constant.
The nearest you can get is:
var letter_goodness = [...]float32 {.0817, .0149, .0278, .0425, .1270, .0223, .0202, .0609, .0697, .0015, .0077, .0402, .0241, .0675, ...
Get a random item from a JavaScript array [duplicate]
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@AnkitPatial: That's a way to "scramble" an array, but the question is about getting a randomly selected element from an array. There's a big difference.
– damd
Mar 4 '16 at 15:04
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What does the “map” method do in Ruby?
...nged unless you use map!):
[1, 2, 3].map { |n| n * n } #=> [1, 4, 9]
Array and Range are enumerable types. map with a block returns an Array. map! mutates the original array.
Where is this helpful, and what is the difference between map! and each? Here is an example:
names = ['danil', 'edmu...
JavaScript loop through json array?
I am trying to loop through the following json array:
11 Answers
11
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Pass array to mvc Action via AJAX
I'm trying to pass an array (or IEnumerable) of ints from via AJAX to an MVC action and I need a little help.
11 Answers
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