typescript - for-in statement

Question

TypeScript docs say nothing about loop like for or for-in. From playing with the language it seems that only any or string variables are supported in for loop.

Why has this decision been made?

Why not use the type information and have strongly-typed iteration variable?

Answer 1

In Typescript 1.5 and later, you can use for..of as opposed to for..in

var numbers = [1, 2, 3];

for (var number of numbers) {
    console.log(number);
}