array-flatten用于对数组进行降维.
const { flatten } = require("array-flatten"); // 降维数组
console.log(flatten([1, [2, 666, [3, [4, [5], 6], 7], 8], 9]));
// 指定深度展开
function flattenWithDepth (array, result, depth) {
for (var i = 0; i < array.length; i++) {
var value = array[i]
// 判断是否到了指定的深度 或者 当前数组是否已经全部展开
if (depth > 0 && Array.isArray(value)) {
flattenWithDepth(value, result, depth - 1)
} else {
result.push(value)
}
}
return result
}
// 全部展开
function flattenForever (array, result) {
for (var i = 0; i < array.length; i++) {
var value = array[i]
if (Array.isArray(value)) {
flattenForever(value, result)
} else {
result.push(value)
}
}
return result
}
function arrayFlatten (array, depth) {
if (depth == null) {
return flattenForever(array, [])
}
return flattenWithDepth(array, [], depth)
}
console.log(arrayFlatten([1, [2, [3, [4, [5], 6], 7], 8], 9], 2));
console.log(arrayFlatten([1, [2, 666, [3, [4, [5], 6], 7], 8], 9]));
原文:https://www.cnblogs.com/xpengp/p/12796331.html