splice的

var DefectImg=[
{
DefectImgId: “61f8b62d-56c6-4456-b476-4872c9ce01c4”,
DefectImgMemo: “33”,
DefectImgUrl:""
},
{
DefectImgId: “b8153f7e-d71e-4c03-997c-f576cef02bfe”,
DefectImgMemo: “44”,
DefectImgUrl:""
},
{
DefectImgId: “”,
DefectImgMemo: “55”,
DefectImgUrl:""
}
];
for (var j = DefectImg.length - 1; j >= 0; j–) {
if (DefectImg[j].DefectImgId) {
DefectImg.splice(j, 1);
} else {
delete DefectImg[j].DefectImgId
}
}
console.log(DefectImg)

var arr = new Array(1, 2, 2, 4, 5);
for(var i in arr){
	if(arr[i]==2){
		arr.splice( i, 1);
		 i = i-1;   
	}
}
console.log(arr)

有个我稀饭的demo。。。（适用于遍历）

var arr = new Array(1, 2, 3, 4, 5); //初始化数字集合
var delete_number = 3; //要被删除的数字
var amount = 2; ////从数组的某位置开始删除数字的个数

var loop = arr.length; //循环次数

//遍历数组
for(var i=0; i < loop; i++){
if(arr[i] === delete_number){ //如果找到要被删除的数字所在的数组下标
var num = arr.splice( i, amount ); //从i位置开始删除1个数字

    i = i - 1;    //改变循环变量
    loop = loop - amount;   //改变循环次数
    
}
else{
    console.log( arr[i] + ", ");
}

}

//结果：1,2,5