feat(array): 新增chunk,compact,head,first,last,flattenDepth,flattenDeep…

…,flatten

packages/array/package.json

@@ -21,5 +21,8 @@
   "publishConfig": {
     "access": "public",
     "registry": "https://registry.npmjs.org/"
+  },
+  "dependencies": {
+    "@v-utils/type": "workspace:^0.0.1"
   }
 }

packages/array/src/index.ts

@@ -1,10 +1,52 @@
 /*
  * @Author: vyron
  * @Date: 2022-03-24 14:48:36
- * @LastEditTime: 2022-03-24 14:48:37
+ * @LastEditTime: 2022-04-01 15:44:39
  * @LastEditors: vyron
  * @Description: 数组常用方法
  * @FilePath: /v-utils/packages/array/src/index.ts
  */
 
+// 判断是否为数组
 export const isArray = Array.isArray
+
+// 将数组拆分成多个长度为 size 的块,并将多个块组成一个新数组并返回;
+// 如果 array 无法被分割成全部等长的块,剩余的元素将组成一个块
+export const chunk = (array: any[], size: number = 1) => {
+  const result: any[] = []
+  let index = 0
+  while (index < array.length) {
+    result.push(array.slice(index, index + size))
+    index += size
+  }
+  return result
+}
+
+// 过滤并返回数组中所有的 truthy 值元素
+export const compact = (array: any[]) => array.filter(Boolean)
+
+// 返回数组的第一个元素,如果没有则返回 undefined
+export const head = (array: any[]) => (isArray(array) ? array[0] : undefined)
+
+export const first = head
+
+// 返回数组的最后一个元素,如果没有则返回 undefined
+export const last = (array: any[]) =>
+  isArray(array) ? array[array.length - 1] : undefined
+
+// 根据 depth 递归减少 array 的嵌套层级
+export const flattenDepth = (array: any[], depth = 1): any[] => {
+  if (!isArray(array) || depth < 1) return array
+  return array.reduce((acc, val) => {
+    if (isArray(val)) {
+      return acc.concat(flattenDepth(val, depth - 1))
+    }
+    return acc.concat(val)
+  }, [])
+}
+
+// 将数组递归为一维数组
+export const flattenDeep = (array: any[]) => flattenDepth(array, array.length)
+
+// 减少一级数组的嵌套
+export const flatten = (array: any[]) => flattenDepth(array)

pnpm-workspace.yaml

@@ -1,2 +1,2 @@
 packages:
-  - 'packages:/**'
+  - 'packages/**'