<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>Document</title> </head> <body> <script> // 去重 var arr = [ { name: '张三', id: 1, integral: 10 }, { name: '李四', id: 2, integral: 20 }, { name: '王五', id: 3, integral: 30 }, { name: '赵六', id: 4, integral: 40 }, { name: '王五', id: 3, integral: 10 }, { name: '王五', id: 3, integral: 80 }, { name: '赵六', id: 4, integral: 20 }, ] console.logarrayUnique2arr, 'id'), 'name') /* reducer 函数接收4个参数: Accumulator acc) 累计器) Current Value cur) 当前值) Current Index index) 当前索引) Source Array srcArray) 源数组) */ function arrayUnique2arr, name) { var hash = {}; return arr.reducefunction acc, cru,index) { if !hash[cru[name]]) { hash[cru[name]] = {index:index} acc.pushcru) }else{ acc.splicehash[cru[name]]['index'],1,cru) } return acc; }, []); } </script> </body> </html>