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sczts-helpers

Node.js Package

助手函数包

安装

npm i sczts-helpers

快速开始

使用助手函数

// 全部引入
import Helpers from "sczts-helpers"

// 映入指定工具类
import { Obj,Arr } from "sczts-helpers"

Helpers.Cache.remember('key',600,()=>123)
Arr.pluck([{id:1,name:'name1'},{id:2,name:'name2'}],'id') // => [1,2]
Obj.pop({a:1,b:2,c:3},'b') // => 2

助手函数

  • Arr
    • pluck(array, colunm) 获取数组指定一列数据
    • wrap(value) 将给定值转换为数组
    • has(array, values) 判断数组中是否存在某些值
    • unique(array,colunms) 数组去重
  • Cache
    • remember(key, ttl, fn) 获取和存储缓存
    • rememberPromise(key, ttl, fn) 获取和存储缓存(返回Promise对象)
    • set(key, data) 设置缓存数据
    • get(key, ?defalut) 获取缓存数据
    • forget(key) 删除指定缓存
    • clear() 清空全部缓存
  • Obj
    • pop(key, default) 弹出对象值
    • diff(val1, val2) 比较两个对象之间的差异
  • Debounce 防抖
  • Throttle 节流

Arr

pluck(array, colunm)

wrap(value)

has(array, values)

unique(array,colunms)

Cache

Obj

Debounce

import { debounce } from "sczts-helpers";
for(let i = 0; i < 5; i++){
  setTimeout(function (){
    console.log('test Debounce', i)
    debounce('key',()=>{
      console.log('exec Debounce')
    },1000)()
  }, 200 * i);
}
/**
 * console.log:
 * test Debounce 0
 * test Debounce 1
 * test Debounce 2
 * test Debounce 3
 * test Debounce 4
 * exec Debounce
 **/

Throttle

import { throttle } from "sczts-helpers";
for(let i = 0; i < 5; i++){
  setTimeout(function (){
    console.log('test Throttle', i)
    throttle('key',()=>{
      console.log('exec Throttle')
    },1000)()
  }, 200 * i);
}
/**
 * console.log:
 * test Throttle 0
 * exec Throttle
 * test Throttle 1
 * test Throttle 2
 * test Throttle 3
 * test Throttle 4
 * exec Throttle
 **/

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