js 对象数组去重

var arr = [{
    "name": "ZYTX",
    "age": "Y13xG_4wQnOWK1QwJLgg11d0pS4hewePU95UHtpMl3eE81uS74NC-6zu-Rtnw4Ix",
    "gender": "AAAAAA.doc"
}, {
    "name": "ZYTA",
    "age": "Y13xG_4wQnOWK1QwJLgg11d0pS4hewePU95UHtpMl3eE81uS74NC-6zu-Rtnw4Ix",
    "gender": "BBBBBB.doc"
}, {
    "name": "ZDTX",
    "age": "Y13xG_4wQnOWK1QwJLgg11d0pS4hewePU95UHtpMl3eE81uS74NC-6zu-Rtnw4Ix",
    "gender": "CCCCCC.doc"
}, {
    "name": "ZYTX",
    "age": "Y13xG_4wQnOWK1QwJLgg11d0pS4hewePU95UHtpMl3eE81uS74NC-6zu-Rtnw4Ix",
    "gender": "AAAAAA.doc"
}];

根据 name 不同去重

方法一：

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

方法二：

var set = arr.reduce(
  function(set, item) {
    set[item["name"]] = item;
    return set;
  },
  {}
);

Object.keys(set).map(function(key) { return set[key]; });

对于 es6 的 Set() 方法，目前只会对纯数组 去重，对与对象数组的去重，等待进一步学习