//1、知道要?jiǎng)h除項(xiàng)的下標(biāo)值
//index為刪除項(xiàng)的下標(biāo)值 ?arr為源數(shù)組
var arrRemoveIndex = function(index,arr) {
? ? if (!arr || arr.length == 0) {
? ? ? ? return ""
? ? }
? ? arr.splice(index,1)
? ? return arr
}
?
//2、知道要?jiǎng)h除項(xiàng)的值
//it 為要?jiǎng)h除項(xiàng)的值 ?arr為源數(shù)組
var arrRemove = function (it, arr) {
? ? if (!arr || arr.length == 0) {
? ? ? ? return ""
? ? }
? ? let flag = arr.indexOf(it)
? ? if (flag > -1) {
? ? ? ? arr.splice(flag, 1)
? ? ? ? return arr
? ? } else {
? ? ? ? console.log("未查找到該元素")
? ? }
}
?
//3、如果要?jiǎng)h除項(xiàng)為對(duì)象，我們需要知道該對(duì)象屬性中的唯一值（不會(huì)重復(fù)的值）
//arr是源數(shù)組，attr是目標(biāo)數(shù)組中的屬性名稱，value是要?jiǎng)h除的屬性名稱對(duì)應(yīng)的值
var arrRemoveJson = function (arr, attr, value) {
? if (!arr || arr.length == 0) {
? ? return ""
? }
? let newArr = arr.filter(function (item, index) {
? ? return item[attr] != value
? })
? return newArr
}
?
let arr = ['aaa','bbb','ccc','ddd']
let arrJson = [{ id: 1 , name: 'cz'},{ id: 2 , name: 'mp'},{ id: 3 , name: 'xp'}];
let newArr1 = arrRemoveIndex(1,arr); ?// ['aaa','ccc','ddd']
let newArr2 = arrRemove('bbb',arr); ? // ['aaa','ccc','ddd']
let newArr3 = arrRemoveJson(arr,'id','2') //[{id:1,name:'cz'},{id:3,name:'xp'}]

arr.splice(arr.findIndex(i => i.id === id), 1);