Create Arrays

Creating an empty array is super easy:

const foo: string[] = [];

If you want an array to loop over:

[...new Array(6)]; 

If you want to create an array pre-filled with some content use the ES6 Array.prototype.fill:

const foo: string[] = new Array(3).fill('');
console.log(foo); // ['','',''];

If you want to create an array of a predefined length with calls you can use the spread operator:

const someNumbers = [...new Array(3)].map((_,i) => i * 10);
console.log(someNumbers); // [0,10,20];