New sorting plug in for numeric sorting within strings.

- DD420

sorting/numString.js

@@ -0,0 +1,63 @@
+/**
+ * 
+ * This plug in will sort only on the number value that is included anywhere in a Regex.
+ * This is useful for sorting data which requires some extra context to be included in the table.
+ *
+ *  @name numString
+ *  @summary Sort with the prefixed word `dt-string The` removed, if present
+ *  @author [Sandy Galloway](http://datatables.net)
+ *
+ * 
+ *  @example
+ * //This example shows a mixture of text and number values, with the number at the start of the expression.
+ * //It is using regex and start and end of expression tags.
+ * //It will match "5 examples completed." for example. 
+ * $(document).ready( function(){
+ *      $.fn.dataTable.numString(/^\d+ examples? completed.$/);
+ *      var table = $('#example').DataTable();
+ * })
+ * 
+ * @example
+ *  //This example shows a mixture of text and number values, with the number at the end of the expression.
+ * //It is using regex and start and end of expression tags.
+ * //It will match "Examples left: 67" for example. 
+ *  $(document).ready( function(){
+ *      $.fn.dataTable.numString(/^Examples? left: \d+$/);
+ *      var table = $('#example').DataTable();
+ * })
+ * 
+ * @example
+ * //This example shows a mixture of text and number values, with the number in the middle of the expression.
+ * //It is using regex and no start and end of expression tags.
+ * //It will match "Only 1 left." for example. 
+ *  $(document).ready(function(){
+ *      $.fn.dataTable.numString(/Only \d+ left./);
+ *      var table = $('example').DataTable();
+ * })
+ * 
+    */
+$.fn.dataTable.numString = function(format) {
+    //This is the type detection plug in
+    $.fn.dataTable.ext.type.detect.unshift(function(data) {
+      if (typeof data !== "string") {
+        return null;
+      }
+  
+      if (data.match(format)) {
+        return "numString-" + format.source;
+      }
+  
+      return null;
+    });
+    
+    //This is the ordering plug in
+    $.fn.dataTable.ext.type.order[
+      "numString-" + format.source + "-pre"
+    ] = function(data) {
+      var num = data.replace(/\D/g, "");
+  
+      return num * 1;
+    };
+    // end plug-in
+  };
+