Created
May 2, 2022 23:41
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| interface Item { | |
| id : string; | |
| application : string; | |
| type : string; | |
| title : string; | |
| } | |
| type ResultType = { [key: string] : Array<Item> }; | |
| var input : Array<Item> = [{ | |
| "id": "REPORT1", | |
| "application": "APP1", | |
| "type": "TYPE1", | |
| "title": "" | |
| }, | |
| { | |
| "id": "REPORT2", | |
| "application": "APP1", | |
| "type": "TYPE1", | |
| "title": "" | |
| }, | |
| { | |
| "id": "REPORT3", | |
| "application": "APP1", | |
| "type": "TYPE2", | |
| "title": "" | |
| }, | |
| { | |
| "id": "REPORT4", | |
| "application": "APP2", | |
| "type": "TYPE3", | |
| "title": "" | |
| } | |
| ]; | |
| var output = input.reduce((result : ResultType, item : Item ) => { | |
| // Get app object corresponding to current item from result (or insert if not present) | |
| var app = result[item.application] = result[item.application] || {}; | |
| // Get type array corresponding to current item from app object (or insert if not present) | |
| var type = app[item.type] = app[item.type] || []; | |
| // Add current item to current type array | |
| type.push(item); | |
| // Return the result object for this iteration | |
| return result; | |
| }, {} as ResultType); | |
| console.log(output); |
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