javascript 删除对象重复元素

Question

一个json数组，根据日期来对应筛检属性
publishtime为发布日期，循环的时候希望创建一个数组publishtime只出现一次的值后面如果重复都不出现，比如May.13现在出现3次，那要实现以后就是只有第一次出现May.13的时候保留这个字段其他全部删除
[{
"length":"02:50",
"channel":"笑点集装箱",
"vid":"1a665661c9bfdf9",
"title":"如果有一天siri控制了人类…",
"gender":0,
"image":"http://7xiqwt.com2.z0.glb.qiniucdn.com/image/1eb46ae2ec8bcc1baad174c11...",
"avator":"http://7xiqwt.com2.z0.glb.qiniucdn.com/image/46755e0014e5a74babae13cee...",
"click":42219,
"chid":"21ddc47f57e79f2",
"publishtime":"Now"
},
{
"length":"01:01",
"channel":"冉冉是Vimeo的搬运工",
"vid":"1bfef4c4ccae113",
"title":"如果你还没有吃夜宵，看看这支片",
"gender":2,
"image":"http://7xiqwt.com2.z0.glb.qiniucdn.com/image/d9b2a7b2a1f402eafcfe2464c...",
"avator":"http://7xiqwt.com2.z0.glb.qiniucdn.com/image/cf782ac9cd01dd9fe5b62285f...",
"click":421,
"chid":"9eb01af2093606e",
"publishtime":"May.13"
},
{
"length":"01:23",
"channel":"为了报仇看电影",
"vid":"e0621d6ece5c448",
"title":"复仇者联盟的生活聚会里都在玩些什么",
"gender":2,
"image":"http://7xiqwt.com2.z0.glb.qiniucdn.com/image/7be260d5edda9f11f268b75d7...",
"avator":"http://7xiqwt.com2.z0.glb.qiniucdn.com/image/51c9acd51dce33e06730bb172...",
"click":90,
"chid":"85b8379357b2e16",
"publishtime":"May.13"
},
{
"length":"03:53",
"channel":"道理要从街上学",
"vid":"15a6623fb5a5d4b",
"title":"这3个学生对流浪汉做的事感动了1千万人",
"gender":0,
"image":"http://7xiqwt.com2.z0.glb.qiniucdn.com/image/ff305c1bd0761c87e2c9105f0...",
"avator":"http://7xiqwt.com2.z0.glb.qiniucdn.com/image/6cd7be40224688f9e2412a7b5...",
"click":19665279,
"chid":"3a8048d007fa98e",
"publishtime":"May.13"
}]

Answer 1

(functionaa(list){for(vari=0,len=list.length;i

Answer 2

我也来一发：functionfilter(target){varresult=[];result.push(target.shift());for(vari=0;ii&&result[i].publishtime!=target[i].publishtime){result.push(target[i]);}}returnresult;}filter(array);