@lou.codes/iterables/dist/intersperse.js

🔁 Iterable and AsyncIterable utils

import { flat } from "./flat.js";
import { initial } from "./initial.js";
import { repeat } from "./repeat.js";
import { zip } from "./zip.js";
/**
 * Add the given `separator` between each element of the given iterable.
 *
 * @category Generators
 * @example
 * ```typescript
 * const intersperseComma = intersperse(",");
 * intersperseComma([1, 2, 3]); // [1, ",", 2, ",", 3]
 * ```
 * @param separator Separator to add between each element.
 * @returns Curried function with `separator` in context.
 */
export const intersperse = separator => {
	const repeatSeparator = repeat(Infinity)(separator);
	return iterable => initial(flat(zip(iterable)(repeatSeparator)));
};