bholloway · October 18, 2019 04:05
diff --git a/permute.js b/permute.js
 /**
 * Give all permutations of the values of the given arrays.
 *
 * Each given array implies at least on column in the output. Array elements are spread to create multiple columns.
 * This may yeild variable length elements in the final output.
 */
 const permute = (...arrays) =>
    arrays.reduceRight(
        (previous, array) =>
            array.reduce(
                (accumulator, value) => [
                    ...accumulator,
                    ...(previous.length ? previous : [[]]).map(values =>
                        [].concat(value).concat(values),
                    ),
                ],
                [],
            ),
        [],
    );
	/**
	* Give all permutations of the values of the given arrays.
	*
	* Each given array implies at least on column in the output. Array elements are spread to create multiple columns.
	* This may yeild variable length elements in the final output.
	*/
	const permute = (...arrays) =>
	arrays.reduceRight(
	(previous, array) =>
	array.reduce(
	(accumulator, value) => [
	...accumulator,
	...(previous.length ? previous : [[]]).map(values =>
	[].concat(value).concat(values),
	),
	],
	[],
	),
	[],
	);