feature: add new function

Simon he · Simon he · commit 928b90f15837 · 2022-06-14T01:44:18.000+08:00
diff --git a/README.md b/README.md
@@ -2,8 +2,13 @@
 - deepCompare  // 比较2个对象的差异返回不同的属性和具体不同的值
 - deepMerge    // Object.assign的深度拷贝版本，返回合并后传入的第一个对象
 - asyncPool   // limit：控制异步并发执行的数量，tasks：异步任务数组
-- quickFind   // quickFind(array: any[], key: any),返回一个新的实例,在实例中find方法可以根据key查找对应的项,查找效率O(1),set更新或新增项,delete删除项
+- quickFind   // quickFind(array: any[], key: any),返回一个新的实例,在实例中find方法可以根据key查找对应的项,查找效率O(1),set更新或新增项,delete删除项效率都是O(1)
 - quickFilter // quickFilter(array: any[], key: string | number | Array<string | number>, value: string | number | RegExp), 快速模糊查找key名字的项,支持正则匹配
+- deepClone // 简洁的深拷贝
+- curry // 函数柯里化
+- memorizeFn // 根据参数返回一个有缓存的函数
+- debounce // 函数防抖
+- throttle // 函数节流
 
 ## 使用方法
 ### deepMerge
@@ -16,3 +21,10 @@
 ![quickFind](assets/quickFind.png)
 ### quickFilter
 ![quickFilter](assets/quickFilter.png)
+### deepClone
+![deepClone](assets/deepClone.png)
+### curry
+![curry](assets/curry.png)
+### memorizeFn
+![memorizeFn](assets/memorizeFn.png)
+
diff --git a/assets/curry.png b/assets/curry.png
diff --git a/assets/deepClone.png b/assets/deepClone.png
diff --git a/assets/memorizeFn.png b/assets/memorizeFn.png
diff --git a/package.json b/package.json
@@ -57,6 +57,6 @@
     "eslint-plugin-n": "^15.2.1",
     "pkgroll": "^1.3.1",
     "typescript": "^4.7.2",
-    "vitest": "^0.13.1"
+    "vitest": "^0.14.2"
   }
 }
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
diff --git a/src/common.ts b/src/common.ts
@@ -1,5 +1,5 @@
 const _toString = Object.prototype.toString
 
-export function isPlainObject(obj: any) {
+export function isPlainObject(obj: any): boolean {
   return _toString.call(obj) === '[object Object]'
 }
diff --git a/src/curry.ts b/src/curry.ts
@@ -0,0 +1,11 @@
+export function curry(f: Function) {
+  const g = (...args: any[]) => {
+    if (args.length >= f.length)
+      return f(...args)
+
+    return (...more: any[]) => {
+      return g(...args, ...more)
+    }
+  }
+  return g
+}
diff --git a/src/debounce.ts b/src/debounce.ts
@@ -0,0 +1,12 @@
+export function debounce(fn: Function, time: number) {
+  let timer: any = null
+  return function (this: any, e?: any) {
+    if (timer !== null)
+      clearTimeout(timer)
+    setTimeout(() => {
+      const result = fn.call(this, e)
+      timer = null
+      return result
+    }, time)
+  }
+}
diff --git a/src/deepClone.ts b/src/deepClone.ts
@@ -0,0 +1,21 @@
+const types = [Set, Map, WeakMap, WeakSet, RegExp, Date]
+const targetMap = new WeakMap()
+export function deepClone(target: any) {
+  if (targetMap.has(target))
+    return targetMap.get(target)
+  if (typeof target === 'function' || target === null)
+    return target
+  if (types.includes(target.constructor))
+    return new target.constructor(target)
+  if (typeof target !== 'object')
+    return target
+  const cloneObj = Object.create(Object.getPrototypeOf(target), Object.getOwnPropertyDescriptors(target))
+  targetMap.set(target, cloneObj)
+  for (const key of Reflect.ownKeys(target)) {
+    if (typeof target[key] === 'object')
+      cloneObj[key] = deepClone(target[key])
+    else
+      cloneObj[key] = target[key]
+  }
+  return cloneObj
+}
diff --git a/src/index.ts b/src/index.ts
@@ -4,3 +4,8 @@ export { deepMerge } from './deepMerge'
 export { asyncPool } from './asyncPool'
 export { quickFind } from './quickFind'
 export { quickFilter } from './quickFilter'
+export { deepClone } from './deepClone'
+export { curry } from './curry'
+export { memorizeFn } from './memorizeFn'
+export { debounce } from './debounce'
+export { throttle } from './throttle'
diff --git a/src/memorizeFn.ts b/src/memorizeFn.ts
@@ -0,0 +1,7 @@
+export function memorizeFn(fn: Function) {
+  const cache: Record<string, Function> = {}
+  return function (...args: any[]) {
+    const _args = JSON.stringify(args)
+    return cache[_args] || (cache[_args] = fn.apply(fn, args))
+  }
+}
diff --git a/src/quickFind.ts b/src/quickFind.ts
@@ -1,13 +1,11 @@
-export function quickFind(array: any[], id: any) {
+export function quickFind(array: any[], id: string | number) {
   const indexMap = new Map()
-  array.forEach((item, i) => {
-    indexMap.set(item[id], i)
-  })
+  array.forEach((item, i) => indexMap.set(item[id], i))
   return new QuickFind(array, indexMap, id)
 }
 
 class QuickFind {
-  constructor(public array: any[], public indexMap: Map<any, number>, public id: any) {
+  constructor(public array: any[], public indexMap: Map<any, number>, public id: string | number) {
     this.array = array
     this.indexMap = indexMap
     this.id = id
@@ -25,10 +23,8 @@ class QuickFind {
       const index = this.indexMap.get(id)
       if (index === undefined)
         throw new Error('当前id不存在')
-
       if (value[this.id] !== id)
         throw new Error('不可修改唯一id')
-
       this.array[index] = value
     }
     else {
@@ -57,15 +53,12 @@ class QuickFind {
       value = key
       key = undefined
     }
-    if (index !== undefined) {
-      return this._update(id, key, value)
-    }
+    if (index !== undefined) { return this._update(id, key, value) }
     else {
       if (value[this.id] === undefined)
         throw new Error('新增的数据必须包含唯一id')
       if (value[this.id] !== id)
         throw new Error('新增的数据id必须与当前id一致')
-
       this.indexMap.set(id, this.array.length)
       this.array.push(value)
       return this.array
diff --git a/src/throttle.ts b/src/throttle.ts
@@ -0,0 +1,10 @@
+export function throttle(fn: Function, stop: number) {
+  let start = 0
+  return function (this: any, e?: any) {
+    const end = Date.now()
+    if (end - start >= stop) {
+      fn.call(this, e)
+      start = end
+    }
+  }
+}
diff --git a/test/basic.test.ts b/test/basic.test.ts
@@ -1,5 +1,5 @@
 import { describe, expect, it } from 'vitest'
-import { asyncPool, deepCompare, deepMerge, quickFilter, quickFind } from '../src'
+import { asyncPool, curry, deepClone, deepCompare, deepMerge, memorizeFn, quickFilter, quickFind } from '../src'
 
 describe('Test 1', () => {
   it('deepMerge test', () => {
@@ -286,3 +286,49 @@ describe('Test 5', () => {
     `)
   })
 })
+
+describe('Test 6', () => {
+  it('deepClone test', async () => {
+    const arr: any = {
+      name: 'simon5',
+      age: 49,
+      id: 3,
+      fn() { },
+      reg: /\test/,
+      date: Date,
+      null: null,
+      [Symbol(1)]: 1,
+      loop: null,
+    }
+    arr.loop = arr
+    const cloneObj = deepClone(arr)
+    expect(cloneObj).toMatchInlineSnapshot('false')
+    expect(cloneObj.loop === arr.loop).toMatchInlineSnapshot('10')
+  })
+})
+
+describe('Test 7', () => {
+  it('curry test', async () => {
+    function __add(a: number, b: number, c: number, d: number) {
+      return a + b + c + d
+    }
+    const add = curry(__add)
+    expect(add(1, 2)(3)(4)).toBe(10)
+  })
+})
+
+describe('Test 8', () => {
+  it('memorizeFn test', async () => {
+    let count = 0
+    function hello(name: string) {
+      count++
+      return `hello ${name}`
+    }
+    const fn = memorizeFn(hello)
+    fn()
+    fn()
+    fn()
+    expect(count).toBe(1)
+  })
+})
+

Original file line number	Diff line number	Diff line change
`@@ -57,6 +57,6 @@`
`57`	`57`	`"eslint-plugin-n": "^15.2.1",`
`58`	`58`	`"pkgroll": "^1.3.1",`
`59`	`59`	`"typescript": "^4.7.2",`
`60`		`- "vitest": "^0.13.1"`
	`60`	`+ "vitest": "^0.14.2"`
`61`	`61`	`}`
`62`	`62`	`}`
Original file line number	Diff line number	Diff line change
`@@ -1,5 +1,5 @@`
`1`	`1`	`const _toString = Object.prototype.toString`
`2`	`2`
`3`		`-export function isPlainObject(obj: any) {`
	`3`	`+export function isPlainObject(obj: any): boolean {`
`4`	`4`	`return _toString.call(obj) === '[object Object]'`
`5`	`5`	`}`