Initial 'Extract Local' implementation.

pkg/analysis_server/lib/src/services/correction/strings.dart

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library services.src.correction.strings;
 
 
 /**
  * "$"
  */
@@ skipping 24 matching lines @@
   if (a == null) {
     return 1;
   }
   if (b == null) {
     return -1;
   }
   return a.compareTo(b);
 }
 
 /**
+ * Counts how many times [sub] appears in [str].
+ */
+int countMatches(String str, String sub) {
+  if (isEmpty(str) || isEmpty(sub)) {
+    return 0;
+  }
+  int count = 0;
+  int idx = 0;
+  while ((idx = str.indexOf(sub, idx)) != -1) {
+    count++;
+    idx += sub.length;
+  }
+  return count;
+}
+
+/**
  * Checks if [str] is `null`, empty or is whitespace.
  */
 bool isBlank(String str) {
   if (str == null) {
     return true;
   }
   if (str.isEmpty) {
     return true;
   }
   return str.codeUnits.every(isSpace);
@@ skipping 39 matching lines @@
 String removeStart(String str, String remove) {
   if (isEmpty(str) || isEmpty(remove)) {
     return str;
   }
   if (str.startsWith(remove)) {
     return str.substring(remove.length);
   }
   return str;
 }
 
+
 String repeat(String s, int n) {
   StringBuffer sb = new StringBuffer();
   for (int i = 0; i < n; i++) {
     sb.write(s);
   }
   return sb.toString();
 }