将type=-1的对象提到第一位：
let orglist = [//原数组
{name:a,type:0},
{name:b,type:1},
{name:c,type:-1},
]
orglist.forEach((item,idx)=>{
if(item.type == -1){
orglist.splice(idx,1)
orglist.splice(0,0,item)
}
})
console.log(orglist)得到
[//新数组
{name:c,type:-1},
{name:a,type:0},
{name:b,type:1},
]
将数组中某个对象提到第一位
原文：https://www.cnblogs.com/shez/p/14108524.html
