TypeScript Sort Object by Object in Array

Question

Does anyone know how sort Array with Person by value TaskTime in tasks?

export class Person { Id: string; Email: string; FirstName: string; LastName: string; Presence: boolean; RegisterTime: Date; tasks: Array<Task> } export class Task { TaskName: string; DoneTask: boolean; TaskTime: number; } 

Thanks for help

Answer 1

The javascript Array object comes with a builtin sort method, you pass it a compare function like this:

function compare(a, b) { if (a is less than b by some ordering criterion) { return -1; } if (a is greater than b by the ordering criterion) { return 1; } // a must be equal to b return 0; } 

So in your case:

let person = new Person(); console.log(person.tasks.sort((task1, task2) => task1.TaskTime - task2.TaskTime)); 

Answer 2

Try to follow such way to sort your array. The sample code below will sort the array in descending order by blockId field.

this.itemList.sort((left, right): number => { if (left.blockId < right.blockId) return 1; if (left.blockId > right.blockId) return -1; return 0; });