Js对数据实现分组GroupBy特性

一个用于分组的代码片段（有注释）

let list = [{ "name": "John", "Average": 15, "High": 10, "DtmStamp": 1358226000000},{ "name": "Jane", "Average": 16, "High": 92, "DtmStamp": 1358226000000},{ "name": "Jane", "Average": 17, "High": 45, "DtmStamp": 1358226000000},{ "name": "John", "Average": 18, "High": 87, "DtmStamp": 1358226000000},{ "name": "Jane", "Average": 15, "High": 10, "DtmStamp": 1358226060000},{ "name": "John", "Average": 16, "High": 87, "DtmStamp": 1358226060000},{ "name": "John", "Average": 17, "High": 45, "DtmStamp": 1358226060000},{ "name": "Jane", "Average": 18, "High": 92, "DtmStamp": 1358226060000}];

function GroupBy(array, fn) {debugger;const groups = {};array.forEach(function (item) { const group = JSON.stringify(fn(item)); //这里利用对象的key值唯一性的，创建数组 groups[group] = groups[group] || []; groups[group].push(item);});//最后再利用map循环处理分组出来return Object.keys(groups).map(function (group) { return groups[group];});}

//这里如果想要按照name进行分组即如下：const results = GroupBy(list, function (item) {return [item.name];});

console.log(results)