Prototype String Methods in jQuery

gistfile1.txt

$.extend({
  string: {
    // public interface: $.tmpl
    include: function(text, pattern){
      return text.indexOf(pattern) > -1;
    },
    startsWith: function(text, pattern){
      return text.lastIndexOf(pattern, 0) === 0;
    },
    endsWith: function(text, pattern){
      var d = text.length - pattern.length;
      return d >= 0 && text.indexOf(pattern, d) === d;
    },
    repeat: function(str, count){
      if (isNaN(count)) {
        return "";
      }
      var result = [];
      for (var i = 0; i < count; i++) {
        result.push(str);
      }
      return result.join('');
    }
  }
});