whole_func_string: function (needles, haystack) {
        var i,
            needleArr = needles.split(/\s+/g),
            needle,
            needleRegexpArr = [],
            regexp,
            retVal = true,
            hasUpperCase,
            regexpFlags;
  
        // Create filters on an 'and' basis (for 'or' use .join('|'))
        for (i = needleArr.length; i--;) {
          needle = needleArr[i];
  
          // If the item uses upper case, be case sensitive. Otherwise, don't.
          hasUpperCase = !!needle.match(/[A-Z]/),
          regexpFlags = hasUpperCase ? '' : 'i';
  
          // Generate the filter and push it onto the array
          needleRegexpArr.push( new RegExp(needle, regexpFlags) );
        }
  
        for (i = needleRegexpArr.length; i--;) {
          // If the unused option matches the regexp
          if (!haystack.match(needleRegexpArr[i])) {
            retVal = false;
            break;
          }
        }
  
        return retVal;
      }
func_code_string: function (needles, haystack) {
        var i,
            needleArr = needles.split(/\s+/g),
            needle,
            needleRegexpArr = [],
            regexp,
            retVal = true,
            hasUpperCase,
            regexpFlags;
  
        // Create filters on an 'and' basis (for 'or' use .join('|'))
        for (i = needleArr.length; i--;) {
          needle = needleArr[i];
  
          // If the item uses upper case, be case sensitive. Otherwise, don't.
          hasUpperCase = !!needle.match(/[A-Z]/),
          regexpFlags = hasUpperCase ? '' : 'i';
  
          // Generate the filter and push it onto the array
          needleRegexpArr.push( new RegExp(needle, regexpFlags) );
        }
  
        for (i = needleRegexpArr.length; i--;) {
          // If the unused option matches the regexp
          if (!haystack.match(needleRegexpArr[i])) {
            retVal = false;
            break;
          }
        }
  
        return retVal;
      }
func_documentation_string: fancyFilter, taken from https://github.com/Ensighten/Halo.extras/blob/master/src/public/js/Helper.js