Finite boards (#1)

src/utils.js

@@ -33,14 +33,8 @@ export function clone(obj) {
 	return JSON.parse(JSON.stringify(obj));
 }
 
-export function extend(obj, ...sources) {
-	sources.forEach(src => {
-		for (let key in src) {
-			if (src.hasOwnProperty(key)) obj[key] = src[key];
-		}
-	});
-
-	return obj;
+export function has(obj, prop) {
+	return obj && obj.hasOwnProperty(prop);
 }
 
 export function hypotenuse(a, b) {
@@ -115,4 +109,7 @@ export function parseString (str) {
 		str;
 }
 
+export function toFixed(number, precision = 3, fallback = NaN) {
+	return typeof number === 'number' && !isNaN(number) ? Number(number.toFixed(precision)) : fallback;
+}