mirror of https://github.com/thangisme/notes.git
47 lines
1.2 KiB
Markdown
47 lines
1.2 KiB
Markdown
uniq
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====
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Removes all duplicates from an array in place.
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Usage
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=====
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First install using npm:
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npm install uniq
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Then use it as follows:
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```javascript
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var arr = [1, 1, 2, 2, 3, 5]
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require("uniq")(arr)
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console.log(arr)
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//Prints:
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//
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// 1,2,3,5
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//
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```
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## `require("uniq")(array[, compare, sorted])`
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Removes all duplicates from a sorted array in place.
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* `array` is the array to remove items from
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* `compare` is an optional comparison function that returns 0 when two items are equal, and something non-zero when they are different. If unspecified, then the default equals will be used.
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* `sorted` if true, then assume array is already sorted
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**Returns:** A reference to `array`
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**Time Complexity:** `O(array.length * log(arra.length))` or `O(array.length)` if `sorted`
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## Why use this instead of underscore.uniq[ue]?
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A few reasons:
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* This library updates the array in place without making an extra copy (and so it is faster for large arrays)
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* It also accepts a custom comparison function so you can remove duplicates from arrays containing object
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* It is more modular in the sense that it doesn't come with a bazillion other utility grab bag functions.
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# Credits
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(c) 2013 Mikola Lysenko. MIT License
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