Extract file extension: Difference between revisions

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@@ Line 334: / Line 334: @@
 =={{header|C sharp|C#}}==
-<lang [[C sharp|C#]]>
+<lang [[C sharp|C#]]>public static string FindExtension(string filename) {
+    int indexOfDot = filename.Length;
-public static string ExtractExtension(string str)
+    for (int i = filename.Length - 1; i >= 0; i--) {
-{
-            string s = str;
+        char c = filename[i];
-            string temp = "";
+        if (c == '.') {
-            string result = "";
+            indexOfDot = i;
-            bool isDotFound = false;
+            break;
+        }
-            for (int i = s.Length -1; i >= 0; i--)
+        if (c >= '0' && c <= '9') continue;
-            {
+        if (c >= 'A' && c <= 'Z') continue;
-                if(s[i].Equals('.'))
+        if (c >= 'a' && c <= 'z') continue;
-                {
+        break;
+    }
-                    temp += s[i];
+    return filename.Substring(indexOfDot);
-                    isDotFound = true;
+}</lang>
-                    break;
-                }
-                else
-                {
-                    temp += s[i];
-                }
-            }
-            if(!isDotFound)
-            {
-                result = "";
-            }
-            else
-            {
-                for (int j = temp.Length - 1; j >= 0; j--)
-                {
-                    result += temp[j];
-                }
-            }
-            return result;
-}
-</lang>
 =={{header|Emacs Lisp}}==