数组里面的对象去重

给数组b里面的对象去重

b=[

{name:'A', age:'23'},

{name:'B', age:'33'},

{name:'A', age:'43'},

]

var a = {};

b= b.reduce(function(item, next) {

a[next.name] ? '' : a[next.name] = true && item.push(next);

return item

}, [])

最后得到的是 

b=[

{name:'A', age:'23'},

{name:'B', age:'33'},

]