Adding a value to an array in TypeScript

When trying to add values to an array in my code, I encountered an error stating that "number" is not a valid type for the array.

someArray: Array <{ m: number, d: Date}> = [];

this.someArray.push(500,new Date(2020,1,15));

Answer №1

By declaring

someArray: Array <{ m: number, d: Date}> = [];
, you are essentially creating an array called someArray that contains objects of type { m: number, d: Date}.

This means that when you add elements to the array, you must pass objects of type { m: number, d: Date}. For example:

someArray: Array <{ m: number, d: Date}> = [];

this.someArray.push({m: 500, d: new Date(2020,1,15)});

Answer №2

Another way to achieve the same result is by using the spread operator:

const data = { price: 500, date: new Date(2021, 2, 25) };
this.dataArray = [...this.dataArray, data];

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