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AI solution for TypeScript puzzle on
23. implement LengthOfTuple<T>


type LengthOfTuple<T extends any[]> = T['length'];type A = LengthOfTuple<['B', 'F', 'E']>; // 3type B = LengthOfTuple<[]>; // 0


  • We define a generic type T extends any[] that extends any array.
  • We use the length property of type T to get its length and return it as the result of LengthOfTuple<T>.


  • The any keyword is used here to represent any type, including primitive types like string, number, etc. and object types.