💄 Rewrite utils in ES2015

scripts/utils.js

@@ -1,43 +1,46 @@
-/*jslint browser:true, plusplus:true */
-/*globals self */
+'use strict';
 
-(function (self) {
-	'use strict';
-	
-	var utils = {};
-	
-	// random utils
-	utils.getRandomArbitary = function (min, max) {
-		return Math.random() * (max - min) + min;
-	};
-	
-	utils.getRandomInt = function (min, max) {
-		return Math.floor(Math.random() * (max - min + 1)) + min;
-	};
-	
-	utils.getRandomColor = function () {
-		var color = [], i;
-		
-		for (i = 0; i < 3; i++) {
-			color.push(parseFloat(
-				utils.getRandomArbitary(0, 1).toFixed(2)
-			) * 255);
-		}
-		
-		return color;
-	};
-	
-	// colors utils
-	function componentToHex(c) {
-		var hex = parseInt(c, 10).toString(16);
-		return hex.length === 1 ? '0' + hex : hex;
+/**
+ * Get a random whole number
+ *
+ * @param {number} min Minimal value for the number
+ * @param {number} max Maximal value for the number (excluded)
+ * @return {number} Random number
+ */
+export const randomNumber = (min, max) =>
+	Math.floor(Math.random() * (max - min)) + min;
+
+/**
+ * Generate a random color
+ *
+ * @return {Array} RGB components
+ */
+export const randomColor = () => {
+	const color = [];
+
+	for (let i = 0; i < 3; i++) {
+		color.push(parseFloat(Math.random().toFixed(2)) * 255);
 	}
-	
-	utils.rgbToHex = function (c) {
-		console.log(c);
-		return '#' + componentToHex(c[0]) + componentToHex(c[1]) + componentToHex(c[2]);
-	};
-	
-	// exports
-	self.utils = utils;
-}(self));
+
+	return color;
+};
+
+/**
+ * Convert a decimal number to its hexadecimal representation
+ *
+ * @param {number} input Number to be converted
+ * @return {string} Number representation
+ */
+const hex = input => {
+    let hex = parseInt(input, 10).toString(16);
+    return hex.length === 1 ? '0' + hex : hex;
+};
+
+/**
+ * Convert a RGB color to its hexadecimal representation
+ *
+ * @param {Array} color RGB color
+ * @return {string} Hex representation
+ */
+export const rgbToHex =
+    color => '#' + hex(color[0]) + hex(color[1]) + hex(color[2]);