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What Haskell representation is recommended for 2D, unboxed pixel arrays with millions of pixels?
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For multi-dimensional arrays, the current best option in Haskell, in my view, is repa.
Repa provides high performance, regular, multi-dimensional, shape polymorphic parallel arrays. All numeric data is stored unboxed. Functions written with th...
is it possible to change values of the array when doing foreach in javascript?
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The callback is passed the element, the index, and the array itself.
arr.forEach(function(part, index, theArray) {
theArray[index] = "hello world";
});
edit — as noted in a comment, the .forEach() function can take a second argument, which will be used as the value of this...
How does the Java 'for each' loop work?
...erable interface.
Also, if the right-hand side of the for (:) idiom is an array rather than an Iterable object, the internal code uses an int index counter and checks against array.length instead. See the Java Language Specification.
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How to find index of all occurrences of element in array?
...the index of all the instances of an element, say, "Nano", in a JavaScript array.
15 Answers
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Finding sum of elements in Swift array
What is the easiest (best) way to find the sum of an array of integers in swift?
I have an array called multiples and I would like to know the sum of the multiples.
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Remove empty elements from an array in Javascript
How do I remove empty elements from an array in JavaScript?
44 Answers
44
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Constant Amortized Time
...ic amortised time or whatever else.
Let's take mats' example of a dynamic array, to which you repeatedly add new items. Normally adding an item takes constant time (that is, O(1)). But each time the array is full, you allocate twice as much space, copy your data into the new region, and free the ol...
How to convert a String into an ArrayList?
...umber of words which are comma separated. I wanted each word added into an ArrayList. E.g.:
13 Answers
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Using jQuery to compare two arrays of Javascript objects
I have two arrays of JavaScript Objects that I'd like to compare to see if they are the same. The objects may not (and most likely will not) be in the same order in each array. Each array shouldn't have any more than 10 objects. I thought jQuery might have an elegant solution to this problem, but I ...
Are Javascript arrays sparse?
That is, if I use the current time as an index into the array:
7 Answers
7
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