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b5f3067a6a
Initial setup of project dependencies including axios, express, dotenv, and other supporting packages. Added configuration files and documentation for project setup and usage.
65 lines
1.2 KiB
JavaScript
65 lines
1.2 KiB
JavaScript
'use strict'
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/**
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* Expose `arrayFlatten`.
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*/
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module.exports = arrayFlatten
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/**
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* Recursive flatten function with depth.
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*
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* @param {Array} array
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* @param {Array} result
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* @param {Number} depth
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* @return {Array}
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*/
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function flattenWithDepth (array, result, depth) {
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for (var i = 0; i < array.length; i++) {
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var value = array[i]
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if (depth > 0 && Array.isArray(value)) {
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flattenWithDepth(value, result, depth - 1)
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} else {
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result.push(value)
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}
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}
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return result
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}
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/**
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* Recursive flatten function. Omitting depth is slightly faster.
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*
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* @param {Array} array
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* @param {Array} result
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* @return {Array}
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*/
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function flattenForever (array, result) {
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for (var i = 0; i < array.length; i++) {
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var value = array[i]
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if (Array.isArray(value)) {
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flattenForever(value, result)
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} else {
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result.push(value)
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}
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}
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return result
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}
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/**
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* Flatten an array, with the ability to define a depth.
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*
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* @param {Array} array
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* @param {Number} depth
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* @return {Array}
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*/
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function arrayFlatten (array, depth) {
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if (depth == null) {
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return flattenForever(array, [])
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}
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return flattenWithDepth(array, [], depth)
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}
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