for comprehension in typescript

In TypeScript, a for comprehension is used to loop through an iterable object (such as an array) and apply a function to each element in the object. The resulting values are then combined and returned in a new iterable object. The for comprehension is often used in functional programming to transform collections of data.

Here's an example of a basic for comprehension in TypeScript:

index.ts
const myArray = [1, 2, 3, 4, 5];

const result = [for (x of myArray) x * 2];

console.log(result); // Output: [2, 4, 6, 8, 10]
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In this example, we create an array of numbers and apply a for comprehension to it. The for loop runs through each element in the array and multiplies it by 2. The resulting values are then returned as a new array.

Note that the for comprehension syntax in TypeScript is similar to that in other languages like Scala, but with some minor differences to accommodate TypeScript's static typing.