Merge pull request #1 from timdp/patch-1

sindresorhus · sindresorhus · commit 8f836599ef54 · 2015-12-29T18:36:38.000+01:00
Throw on invalid predicate even if array is empty
diff --git a/index.js b/index.js
@@ -4,17 +4,17 @@ module.exports = function (arr, predicate, ctx) {
 		return arr.findIndex(predicate, ctx);
 	}
 
+	if (typeof predicate !== 'function') {
+		throw new TypeError('predicate must be a function');
+	}
+
 	var list = Object(arr);
 	var len = list.length;
 
 	if (len === 0) {
 		return -1;
 	}
 
-	if (typeof predicate !== 'function') {
-		throw new TypeError('predicate must be a function');
-	}
-
 	for (var i = 0; i < len; i++) {
 		if (predicate.call(ctx, list[i], i, list)) {
 			return i;
