Posted in Javascript onJanuary 05, 2018
本文实例讲述了JS实现数组简单去重及数组根据对象中的元素去重操作。分享给大家供大家参考,具体如下:
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:
JS实现数组简单去重及数组根据对象中的元素去重操作示例
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