Merge pull request #28 from YoussefKababe/master

Fix and optimize code

Author: blakeembrey

combine-two-strings/combine-two-strings.js

@@ -1,26 +1,19 @@
 var combineTwoStrings = function (str1, str2, str3) {
   var pos1 = 0,
       pos2 = 0;
-
+      
   if (str1 + str2 === str3) { return true; }
-
+  
   for (var i = 0; i < str3.length; i++) {
-    // If both the next characters match, we need to look ahead to the next
-    // value and decide which path to take
-    if (str3[i] === str1[pos1] && str3[i] === str2[pos2]) {
-      if (str3[i + 1] === str1[pos1 + 1]) {
-        pos1 += 1;
-      } else {
-        pos2 += 1;
-      }
-    } else if (str3[i] === str1[pos1]) {
-      pos1 += 1;
-    } else if (str3[i] === str2[pos2]) {
-      pos2 += 1;
-    } else {
+    if (str3[i] === str1[pos1]) {
+      pos1++;
+    } 
+    else if (str3[i] === str2[pos2]) {
+      pos2++;
+    } 
+    else if (str3.length - i - 1 < str1.length - pos1 + str2.length - pos2) {
       return false;
-    }
+    } 
   }
-
   return true;
 };