js数组简单去重,js数组根据对象中的元素去重

js数组简单去重

var arr1 = [1, 2, 3, 4, 5, 6, 3, 4, 3];
function arrayUnique1(arr) {
var result = [], hash = {};
for (var i = 0, elem; (elem = arr[i]) != null; i++) {
if (!hash[elem]) {
result.push(elem);
hash[elem] = true;
}
}
return result;
}
console.log(arrayUnique1(arr1));结果：

js数组根据对象中的元素去重

var arr2 = [
{ name: "name1", num: "1" },
{ name: "name2", num: "11" },
{ name: "name3", num: "12" },
{ name: "name4", num: "13" },
{ name: "name2", num: "1" },
{ name: "name6", num: "12" }
]

function arrayUnique2(arr, name) {
var hash = {};
return arr.reduce(function (item, next) {
hash[next[name]] ? '' : hash[next[name]] = true && item.push(next);
return item;
}, []);
}

console.log(arrayUnique2(arr2, "name"));
console.log(arrayUnique2(arr2, "num"));

结果：

意外金喜的博客：http://blog.csdn.net/zzwwjjdj1