| Leo Repp | 58b9f11 | 2021-11-22 11:57:47 +0100 | [diff] [blame^] | 1 | var baseTimes = require('./_baseTimes'), |
| 2 | castFunction = require('./_castFunction'), |
| 3 | toInteger = require('./toInteger'); |
| 4 | |
| 5 | /** Used as references for various `Number` constants. */ |
| 6 | var MAX_SAFE_INTEGER = 9007199254740991; |
| 7 | |
| 8 | /** Used as references for the maximum length and index of an array. */ |
| 9 | var MAX_ARRAY_LENGTH = 4294967295; |
| 10 | |
| 11 | /* Built-in method references for those with the same name as other `lodash` methods. */ |
| 12 | var nativeMin = Math.min; |
| 13 | |
| 14 | /** |
| 15 | * Invokes the iteratee `n` times, returning an array of the results of |
| 16 | * each invocation. The iteratee is invoked with one argument; (index). |
| 17 | * |
| 18 | * @static |
| 19 | * @since 0.1.0 |
| 20 | * @memberOf _ |
| 21 | * @category Util |
| 22 | * @param {number} n The number of times to invoke `iteratee`. |
| 23 | * @param {Function} [iteratee=_.identity] The function invoked per iteration. |
| 24 | * @returns {Array} Returns the array of results. |
| 25 | * @example |
| 26 | * |
| 27 | * _.times(3, String); |
| 28 | * // => ['0', '1', '2'] |
| 29 | * |
| 30 | * _.times(4, _.constant(0)); |
| 31 | * // => [0, 0, 0, 0] |
| 32 | */ |
| 33 | function times(n, iteratee) { |
| 34 | n = toInteger(n); |
| 35 | if (n < 1 || n > MAX_SAFE_INTEGER) { |
| 36 | return []; |
| 37 | } |
| 38 | var index = MAX_ARRAY_LENGTH, |
| 39 | length = nativeMin(n, MAX_ARRAY_LENGTH); |
| 40 | |
| 41 | iteratee = castFunction(iteratee); |
| 42 | n -= MAX_ARRAY_LENGTH; |
| 43 | |
| 44 | var result = baseTimes(length, iteratee); |
| 45 | while (++index < n) { |
| 46 | iteratee(index); |
| 47 | } |
| 48 | return result; |
| 49 | } |
| 50 | |
| 51 | module.exports = times; |