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