Created
February 25, 2017 16:17
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JS Bin // source https://jsbin.com/diqajocuwi
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta charset="utf-8"> | |
| <meta name="viewport" content="width=device-width"> | |
| <title>JS Bin</title> | |
| </head> | |
| <body> | |
| <script id="jsbin-javascript"> | |
| let students = [ | |
| { name: "Jane", module: "4FE", track: "frontEnd" }, | |
| { name: "Jane", module: "3FE", track: "frontEnd" }, | |
| { name: "Jane", module: "3BE", track: "backEnd" }, | |
| { name: "Jane", module: "4FE", track: "frontEnd" }, | |
| { name: "Jane", module: "2BE", track: "backEnd" }, | |
| { name: "Jane", module: "3BE", track: "backEnd" } | |
| ]; | |
| Array.prototype.groupBy = function(key) { | |
| return this.reduce((acc, item) => { | |
| if (!acc[item[key]]) { | |
| acc[item[key]] = [] | |
| } | |
| acc[item[key]].push(item) | |
| return acc | |
| }, {}) | |
| } | |
| console.log(students.groupBy('track')); | |
| </script> | |
| <script id="jsbin-source-javascript" type="text/javascript">let students = [ | |
| { name: "Jane", module: "4FE", track: "frontEnd" }, | |
| { name: "Jane", module: "3FE", track: "frontEnd" }, | |
| { name: "Jane", module: "3BE", track: "backEnd" }, | |
| { name: "Jane", module: "4FE", track: "frontEnd" }, | |
| { name: "Jane", module: "2BE", track: "backEnd" }, | |
| { name: "Jane", module: "3BE", track: "backEnd" } | |
| ]; | |
| Array.prototype.groupBy = function(key) { | |
| return this.reduce((acc, item) => { | |
| if (!acc[item[key]]) { | |
| acc[item[key]] = [] | |
| } | |
| acc[item[key]].push(item) | |
| return acc | |
| }, {}) | |
| } | |
| console.log(students.groupBy('track'));</script></body> | |
| </html> |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| let students = [ | |
| { name: "Jane", module: "4FE", track: "frontEnd" }, | |
| { name: "Jane", module: "3FE", track: "frontEnd" }, | |
| { name: "Jane", module: "3BE", track: "backEnd" }, | |
| { name: "Jane", module: "4FE", track: "frontEnd" }, | |
| { name: "Jane", module: "2BE", track: "backEnd" }, | |
| { name: "Jane", module: "3BE", track: "backEnd" } | |
| ]; | |
| Array.prototype.groupBy = function(key) { | |
| return this.reduce((acc, item) => { | |
| if (!acc[item[key]]) { | |
| acc[item[key]] = [] | |
| } | |
| acc[item[key]].push(item) | |
| return acc | |
| }, {}) | |
| } | |
| console.log(students.groupBy('track')); |
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