@wezom/toolkit-array/dist/filter-unique.js

Useful tools for working with Arrays

'use strict';

/**
 * Returns new array without duplicates
 * @immutable
 * @example
 *  arrayFilterUnique(['🚗','🛸','🚐','🚁','🚁','🚐','🚐','🛵','🚁','🛵','🛸','🚗']) // => ['🚗','🛸','🚐','🚁','🛵']
 *  arrayFilterUnique([
 *      {icon: '🚗'},
 *      {icon: '🚐'},
 *      {icon: '🚐'},
 *      {icon: '🚗'},
 *      {icon: '🚁'},
 *      {icon: '🛵'},
 *      {icon: '🚁'},
 *      {icon: '🚁'},
 *      {icon: '🛸'},
 *      {icon: '🛵'},
 *      {icon: '🛵'},
 *      {icon: '🛵'},
 *      {icon: '🚁'}
 *  ]) // => [{icon: '🚗'},{icon: '🚐'},{icon: '🚁'},{icon: '🛵'},{icon: '🛸'}]
 */
function filterUnique(array, predicate) {
	if (predicate === void 0) {
		predicate = function (item, i, array) {
			return array.indexOf(item) === i;
		};
	}
	return array.filter(predicate);
}

module.exports = filterUnique;