root / HServer / 00.Server / 00.Program / node_modules / array-flatten / array-flatten.js
이력 | 보기 | 이력해설 | 다운로드 (1.17 KB)
| 1 | 39 | HKM | 'use strict'
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| 2 | |||
| 3 | /**
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| 4 | * Expose `arrayFlatten`.
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| 5 | */
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| 6 | module.exports = arrayFlatten |
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| 7 | |||
| 8 | /**
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| 9 | * Recursive flatten function with depth.
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| 10 | *
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| 11 | * @param {Array} array
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| 12 | * @param {Array} result
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| 13 | * @param {Number} depth
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| 14 | * @return {Array}
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| 15 | */
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| 16 | function flattenWithDepth (array, result, depth) { |
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| 17 | for (var i = 0; i < array.length; i++) { |
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| 18 | var value = array[i]
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| 19 | |||
| 20 | if (depth > 0 && Array.isArray(value)) { |
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| 21 | flattenWithDepth(value, result, depth - 1)
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| 22 | } else {
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| 23 | result.push(value) |
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| 24 | } |
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| 25 | } |
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| 26 | |||
| 27 | return result
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| 28 | } |
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| 29 | |||
| 30 | /**
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| 31 | * Recursive flatten function. Omitting depth is slightly faster.
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| 32 | *
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| 33 | * @param {Array} array
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| 34 | * @param {Array} result
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| 35 | * @return {Array}
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| 36 | */
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| 37 | function flattenForever (array, result) { |
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| 38 | for (var i = 0; i < array.length; i++) { |
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| 39 | var value = array[i]
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| 40 | |||
| 41 | if (Array.isArray(value)) {
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| 42 | flattenForever(value, result) |
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| 43 | } else {
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| 44 | result.push(value) |
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| 45 | } |
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| 46 | } |
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| 47 | |||
| 48 | return result
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| 49 | } |
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| 50 | |||
| 51 | /**
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| 52 | * Flatten an array, with the ability to define a depth.
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| 53 | *
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| 54 | * @param {Array} array
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| 55 | * @param {Number} depth
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| 56 | * @return {Array}
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| 57 | */
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| 58 | function arrayFlatten (array, depth) { |
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| 59 | if (depth == null) { |
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| 60 | return flattenForever(array, [])
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| 61 | } |
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| 62 | |||
| 63 | return flattenWithDepth(array, [], depth)
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| 64 | } |