You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
54 lines
1.6 KiB
54 lines
1.6 KiB
6 years ago
|
var arrayMap = require('./_arrayMap'),
|
||
|
|
baseIteratee = require('./_baseIteratee'),
|
||
|
|
baseMap = require('./_baseMap'),
|
||
|
|
isArray = require('./isArray');
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Creates an array of values by running each element in `collection` thru
|
||
|
|
* `iteratee`. The iteratee is invoked with three arguments:
|
||
|
|
* (value, index|key, collection).
|
||
|
|
*
|
||
|
|
* Many lodash methods are guarded to work as iteratees for methods like
|
||
|
|
* `_.every`, `_.filter`, `_.map`, `_.mapValues`, `_.reject`, and `_.some`.
|
||
|
|
*
|
||
|
|
* The guarded methods are:
|
||
|
|
* `ary`, `chunk`, `curry`, `curryRight`, `drop`, `dropRight`, `every`,
|
||
|
|
* `fill`, `invert`, `parseInt`, `random`, `range`, `rangeRight`, `repeat`,
|
||
|
|
* `sampleSize`, `slice`, `some`, `sortBy`, `split`, `take`, `takeRight`,
|
||
|
|
* `template`, `trim`, `trimEnd`, `trimStart`, and `words`
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @since 0.1.0
|
||
|
|
* @category Collection
|
||
|
|
* @param {Array|Object} collection The collection to iterate over.
|
||
|
|
* @param {Function} [iteratee=_.identity] The function invoked per iteration.
|
||
|
|
* @returns {Array} Returns the new mapped array.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* function square(n) {
|
||
|
|
* return n * n;
|
||
|
|
* }
|
||
|
|
*
|
||
|
|
* _.map([4, 8], square);
|
||
|
|
* // => [16, 64]
|
||
|
|
*
|
||
|
|
* _.map({ 'a': 4, 'b': 8 }, square);
|
||
|
|
* // => [16, 64] (iteration order is not guaranteed)
|
||
|
|
*
|
||
|
|
* var users = [
|
||
|
|
* { 'user': 'barney' },
|
||
|
|
* { 'user': 'fred' }
|
||
|
|
* ];
|
||
|
|
*
|
||
|
|
* // The `_.property` iteratee shorthand.
|
||
|
|
* _.map(users, 'user');
|
||
|
|
* // => ['barney', 'fred']
|
||
|
|
*/
|
||
|
|
function map(collection, iteratee) {
|
||
|
|
var func = isArray(collection) ? arrayMap : baseMap;
|
||
|
|
return func(collection, baseIteratee(iteratee, 3));
|
||
|
|
}
|
||
|
|
|
||
|
|
module.exports = map;
|