calcChildrenLength

统计数组中所有节点子集合总长度

引入版本

0.55.0

Demo

import { calcChildrenLength } from '@wyfex/iutils'

const treeData = [
  {
    id: 1,
    children: [
      { id: 11, children: [111, 112] },
      { id: 12, children: [] }
    ]
  },
  {
    id: 2,
    children: [1, 2, 3]
  }
]

console.log('===== 测试1：不开启递归 deep=false =====')
// 只统计第一层children长度：2 + 3 = 5
console.log('结果：', calcChildrenLength(treeData)) // 5

console.log('===== 测试2：开启递归 deep=true =====')
// 第一层:2+3；深层 [111,112] 长度2  => 2+3+2 =7
console.log('结果：', calcChildrenLength(treeData, { deep: true })) //7

console.log('\n===== 测试3：自定义childrenKey =====')
const customKeyData = [
  { id: 1, subs: [1, 2] },
  { id: 2, subs: [1] }
]
console.log(
  '结果：',
  calcChildrenLength(customKeyData, { childrenKey: 'subs' })
) //3

console.log('\n===== 测试4：传入非数组 =====')
console.log('结果：', calcChildrenLength({ id: 1 }, { deep: true })) //0

console.log('\n===== 测试5：空数组 =====')
console.log('结果：', calcChildrenLength([], { deep: true })) //0

console.log('\n===== 测试6：节点不存在子字段 =====')
const noChildData = [{ id: 1 }, { id: 2, children: null }]
console.log('结果：', calcChildrenLength(noChildData, { deep: true })) //0

console.log('\n===== 测试7：统计二维数组 =====')
console.log(
  '结果：',
  calcChildrenLength([
    [1, 2],
    [3, 4, 5]
  ])
) // 5

console.log('\n===== 测试8：统计多维数组 =====')
console.log(
  '结果：',
  calcChildrenLength(
    [
      [[1], [2, 3]],
      [4, 5]
    ],
    { deep: true }
  )
) // 7