		@@ -16,15 +16,13 @@ module.exports = cartesianProduct;

		function baseProduct(arr1, arr2) {
		var output = [];
		function baseProduct(prevProduct, arr2) {
		//pre allocate all our memory
		var newProduct = new Array(prevProduct.length * arr2.length);

		for (var i = 0; i < arr1.length; i++) {
		var item = isArray(arr1[i]) ? arr1[i] : [arr1[i]];

		for (var i = 0; i < prevProduct.length; i++) {
		for (var j = 0; j < arr2.length; j++) {
		var items = item.concat([arr2[j]]);
		output.push(items);
		//always provide array to array.concat for consistent behavior
		newProduct[i * arr2.length + j] = prevProduct[i].concat([arr2[j]]);
		}
		}

		return output;
		return newProduct;
		}
		@@ -34,3 +32,3 @@
		if (!isArray(arr)) {
		throw new Error('just-array-product expects an array');
		throw new Error('just-cartesian-product expects an array');
		}
		@@ -42,9 +40,17 @@

		var output = arr[0];
		if(!isArray(arr[0])) {
		throw new Error('set at index 0 must be an array');
		}

		//initialize our product array
		var product = arr[0].map(function(v) { return [v]; });

		for (var i = 1; i < arr.length; i++) {
		output = baseProduct(output, arr[i]);
		if(!isArray(product)) {
		throw new Error('set at index ' + i + ' must be an array');
		}
		product = baseProduct(product, arr[i]);
		}

		return output;
		return product;
		}

package.json

		{
		"name": "just-cartesian-product",
		"version": "1.0.2",
		"version": "3.1.0",
		"description": "Cartesian product of arrays",
		"type": "commonjs",
		"main": "index.js",
		"module": "index.esm.js",
		"exports": {
		".": {
		"require": "./index.js",
		"default": "./index.esm.js"
		}
		},
		"types": "index.d.ts",
		"scripts": {
		"test": "echo \"Error: no test specified\" && exit 1"
		"test": "echo \"Error: no test specified\" && exit 1",
		"build": "rollup -c"
		},
		@@ -9,0 +19,0 @@ "repository": "https://github.com/angus-c/just",

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