prototype: Add String.prototype.startsWith, String.prototype.endsWith…

…, and String.prototype.include. Closes #7075.

CHANGELOG

@@ -1,5 +1,7 @@
 *SVN*
 
+* Add String.prototype.startsWith, String.prototype.endsWith, and String.prototype.include.  Closes #7075.  [Tobie Langel]
+
 * Improve performance of String.prototype.escapeHTML by using a cached div and text node.  Closes #6937.  [altblue]
 
 * Make setStyle() with opacity: 0 in Internet Explorer work correctly.  [Thomas Fuchs]

src/ajax.js

@@ -95,7 +95,7 @@ Ajax.Request.prototype = Object.extend(new Ajax.Base(), {
 
     // when GET, append parameters to URL
     if (this.method == 'get' && params)
-      this.url += (this.url.indexOf('?') > -1 ? '&' : '?') + params;
+      this.url += (this.url.include('?') ? '&' : '?') + params;
 
     try {
       Ajax.Responders.dispatch('onCreate', this, this.transport);

src/string.js

@@ -140,6 +140,18 @@ Object.extend(String.prototype, {
       return '"' + escapedString.replace(/"/g, '\\"') + '"';
     else
       return "'" + escapedString.replace(/'/g, '\\\'') + "'";
+  },
+
+  include: function(pattern){
+    return this.indexOf(pattern) > -1;
+  },
+
+  startsWith: function(pattern){
+    return this.indexOf(pattern) == 0;
+  },
+
+  endsWith: function(pattern){
+    return this.indexOf(pattern) == (this.length - pattern.length);
   }
 });
 

test/unit/string.html

@@ -322,6 +322,29 @@ <h1>Prototype Unit test file</h1>
       assertEqual('\'test \\\'test\\\' "test"\'', 'test \'test\' "test"'.inspect());
     }},
 
+    testInclude: function() {with(this) {
+      assert('hello world'.include('h'));
+      assert('hello world'.include('hello'));
+      assert('hello world'.include('llo w'));
+      assert('hello world'.include('world'));      
+      assert(!'hello world'.include('bye'));
+      assert(!''.include('bye'));
+    }},
+
+    testStartsWith: function() {with(this) {
+      assert('hello world'.startsWith('h'));
+      assert('hello world'.startsWith('hello'));
+      assert(!'hello world'.startsWith('bye'));
+      assert(!''.startsWith('bye'));
+    }},
+
+    testEndsWith: function() {with(this) {
+      assert('hello world'.endsWith('d'));
+      assert('hello world'.endsWith(' world'));
+      assert(!'hello world'.endsWith('planet'));
+      assert(!''.endsWith('planet'));
+    }},
+
     testSucc: function() {with(this) {
       assertEqual('b', 'a'.succ());
       assertEqual('B', 'A'.succ());