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 JavaScript Array.concat function in the type system. A type takes the two arguments. The output should be a new array that includes inputs in ltr order
For example:
type Result = Concat<[1], [2]> // expected to be [1, 2]Solutions
Approach 1
type Concat<T extends readonly any[], U extends readonly any[]> = [
...T,
...U
]