js对象数组去除重复

一、使用数组方法reduce

var obj = {};
var aa = [{
    "name": "aa",
    "pwd": "xvxv"
}, {
    "name": "aa",
    "pwd": "xvxv"
}, {
    "name": "bb",
    "pwd": "xvxv"
}, {
    "name": "cc",
    "pwd": "xvxv"
}];

aa = aa.reduce(function(item, next) {
    obj[next.name] ? '' : obj[next.name] = true && item.push(next);
    return item;
}, []);
console.log(aa);

二、判断对象中是否存在key

var result = [];
var obj = {};
for(var i =0; i<aa.length; i++){
if(!obj[aa[i].key]){
result.push(aa[i]);
obj[aa[i].key] = true;
}
}
console.log(result);