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/**
* DO NOT EDIT
*
* This file was automatically generated by
* https://github.com/Polymer/gen-typescript-declarations
*
* To modify these typings, edit the source file(s):
* lib/utils/array-splice.html
*/
/// <reference path="boot.d.ts" />
declare namespace Polymer {
/**
* Module that provides utilities for diffing arrays.
*/
namespace ArraySplice {
/**
* Returns an array of splice records indicating the minimum edits required
* to transform the `previous` array into the `current` array.
*
* Splice records are ordered by index and contain the following fields:
* - `index`: index where edit started
* - `removed`: array of removed items from this index
* - `addedCount`: number of items added at this index
*
* This function is based on the Levenshtein "minimum edit distance"
* algorithm. Note that updates are treated as removal followed by addition.
*
* The worst-case time complexity of this algorithm is `O(l * p)`
* l: The length of the current array
* p: The length of the previous array
*
* However, the worst-case complexity is reduced by an `O(n)` optimization
* to detect any shared prefix & suffix between the two arrays and only
* perform the more expensive minimum edit distance calculation over the
* non-shared portions of the arrays.
*
* @returns Returns an array of splice record objects. Each of these
* contains: `index` the location where the splice occurred; `removed`
* the array of removed items from this location; `addedCount` the number
* of items added at this location.
*/
function calculateSplices(current: any[], previous: any[]): any[];
}
}
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