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Split _.uniq out into _.uniqBy.

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jdalton
2015-07-05 16:44:34 -07:00
committed by John-David Dalton
parent abd67d0786
commit 8ac1a67b7d
2 changed files with 118 additions and 74 deletions
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41
lodash.src.js
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@@ -5328,18 +5328,14 @@
* [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
* for equality comparisons, in which only the first occurence of each element
* is kept. Providing `true` for `isSorted` performs a faster search algorithm
* for sorted arrays. If an iteratee function is provided it's invoked for
* each element in the array to generate the criterion by which uniqueness
* is computed. The iteratee is invoked with three arguments: (value, index, array).
* for sorted arrays.
*
* @static
* @memberOf _
* @alias unique
* @category Array
* @param {Array} array The array to inspect.
* @param {boolean} [isSorted] Specify the array is sorted.
* @param {Function|Object|string} [iteratee=_.identity] The function invoked per iteration.
* @returns {Array} Returns the new duplicate-value-free array.
* @returns {Array} Returns the new duplicate free array.
* @example
*
* _.uniq([2, 1, 2]);
@@ -5348,18 +5344,42 @@
* // using `isSorted`
* _.uniq([1, 1, 2], true);
* // => [1, 2]
*/
function uniq(array, isSorted) {
var length = array ? array.length : 0;
if (!length) {
return [];
}
return (isSorted && typeof isSorted == 'boolean' && getIndexOf() == baseIndexOf)
? sortedUniq(array)
: baseUniq(array);
}
/**
* This method is like `_.uniq` except that it accepts an iteratee which is
* invoked for each value in `array` to generate the criterion by which
* uniqueness is computed. The iteratee is invoked with three arguments:
* (value, index, array).
*
* // using an iteratee function
* _.uniq([1, 2.5, 1.5, 2], function(n) {
* @static
* @memberOf _
* @category Array
* @param {Array} array The array to inspect.
* @param {boolean} [isSorted] Specify the array is sorted.
* @param {Function|Object|string} [iteratee=_.identity] The function invoked per iteration.
* @returns {Array} Returns the new duplicate free array.
* @example
*
* _.uniqBy([1, 2.5, 1.5, 2], function(n) {
* return Math.floor(n);
* });
* // => [1, 2.5]
*
* // using the `_.property` callback shorthand
* _.uniq([{ 'x': 1 }, { 'x': 2 }, { 'x': 1 }], 'x');
* _.uniqBy([{ 'x': 1 }, { 'x': 2 }, { 'x': 1 }], 'x');
* // => [{ 'x': 1 }, { 'x': 2 }]
*/
function uniq(array, isSorted, iteratee) {
function uniqBy(array, isSorted, iteratee) {
var length = array ? array.length : 0;
if (!length) {
return [];
@@ -11444,6 +11464,7 @@
lodash.transform = transform;
lodash.union = union;
lodash.uniq = uniq;
lodash.uniqBy = uniqBy;
lodash.unzip = unzip;
lodash.unzipWith = unzipWith;
lodash.values = values;