Tech Challenge

2026-07-13

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Daily Tech Challenge

TypeScript

medium

Question 1 of 5

Using the built-in `ThisParameterType` utility type below, what is the resolved type of `T`?

Example

function toHex(this: number, radix?: number): string {
  return this.toString(radix ?? 16);
}

type T = ThisParameterType<typeof toHex>;

Monday, July 13, 2026 · A new challenge drops every day