Interleave arrays and other iterables, with full type support.

Examples

Interleaving an array:

import interleave from "interleave";

interleave(['a', 'b', 'c'], [1, 2]);
// Returns ['a', 1, 'b', 2, 'c']

// Also supports multiple arrays:
interleave(['a', 'b', 'c'], [1, 2, 3], ['A', 'B', 'C']);
// Returns ['a', 1, 'A', 'b', 2, 'B', 'c', 3, 'C']

Interleaving an iterable:

// This can be any iterable. String example:
interleave('abc', 'ABC');
// Returns ['a', 'A', 'b', 'B', 'c', 'C']

Other example use case using strings:

// You could join them into a string like this, using the .join() array method:
interleave('abc', 'ABC').join('');
// Returns 'aAbBcC'

Documentation

Method overloads:

• interleave<T>(...arrays: T[][]): T[]
  • Interleaves multiple arrays.
• interleave<T>(...iterables: Iterable<T>[]): T[]
  • Interleaves multiple iterators.

Both signatures do exactly the same thing, though the arrays implementation does not depend on iterators.

Edge Cases

• Nothing is passed in
  • Returns an empty array
• One array is passed in
  • Returns that array
• Arrays/iterators are of different lengths
  • Elements of each array are interleaved until there are no more of that array, and other array/iterators will continue to be interleaved:

    interleave([1, 2, 3], [4, 5], [6, 7, 8])
    // Returns [1, 4, 6, 2, 5, 7, 3, 8]
    

Edge cases have been tested with Jest. Jest tests are included in dist/index.test.js.