@wezom/toolkit-array/dist/toggle-item.js

Useful tools for working with Arrays

'use strict';

var clone = require('./clone.js');

/**
 * Adds an element to an array or removes if the array already has such an element
 * @immutable
 * @example
 *  arrayToggleItem([1, 2, 3], 9); // => [1, 2, 3, 9]
 *  arrayToggleItem([1, 2, 3, 9], 2); // => [1, 3, 9]
 *  arrayToggleItem(
 *      [{ x: 1 }, { x: 2 }, { x: 3 }],
 *      { x: 2 },
 *      (array, item) => array.findIndex((el) => el.x === item.x),
 *  ); // => [{ x: 1 }, { x: 3 }]
 */
function toggleItem(array, item, predicate) {
	if (predicate === void 0) {
		predicate = function (array, item) {
			return array.indexOf(item);
		};
	}
	var clone$1 = clone(array);
	var index = predicate(clone$1, item);
	if (index >= 0) {
		clone$1.splice(index, 1);
	} else {
		clone$1.push(item);
	}
	return clone$1;
}

module.exports = toggleItem;