Disclosure
Most of the problems under my TypeHero Challenges folder were either obtained from typehero.dev or from type-challenges repo. Purpose of these articles are just to document my approaches for my easy reference. Please visit the respective links for more info.
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Problem Description
Implement the util type If<C, T, F> which accepts condition C, a truthy value T, and a falsy value F. C is expected to be either true or false while T and Fcan be any type.
For example:
type A = If<true, 'a', 'b'> // expected to be 'a'
type B = If<false, 'a', 'b'> // expected to be 'b'Solutions
Approach 1
type If<C extends boolean, T, F> = C extends true ? T : F;