typescript-tuple

import { Append, Reverse, Concat } from 'typescript-tuple'; // Define some base tuples with strict types type MyTupleA = ['hello', 'world']; type MyTupleB = [1, 2, 3]; // --- Example 1: Appending an element --- // Creates a new tuple type with an additional element at the end. type AppendedTuple = Append<MyTupleA, '!'>; // Expect: ['hello', 'world', '!'] const appendedInstance: AppendedTuple = ['hello', 'world', '!']; console.log('Appended Tuple:', appendedInstance); // --- Example 2: Reversing a tuple --- // Creates a new tuple type with elements in reverse order. type ReversedTuple = Reverse<MyTupleB>; // Expect: [3, 2, 1] const reversedInstance: ReversedTuple = [3, 2, 1]; console.log('Reversed Tuple:', reversedInstance); // --- Example 3: Concatenating two tuples --- // Merges two tuple types into a single new tuple type. type ConcatenatedTuple = Concat<MyTupleA, MyTupleB>; // Expect: ['hello', 'world', 1, 2, 3] const concatenatedInstance: ConcatenatedTuple = ['hello', 'world', 1, 2, 3]; console.log('Concatenated Tuple:', concatenatedInstance); // This library operates purely at the TypeScript type level. // The variables 'appendedInstance', 'reversedInstance', and 'concatenatedInstance' // are runtime examples of how values conforming to these derived types would look. // The type manipulations themselves do not generate any JavaScript runtime code.