Adds a regEx based indexOf function to the Array prototype.

reIndexOf.js

//install helper funtion not found in javascript
/** * Regular Expresion IndexOf for Arrays 
* This little addition to the Array prototype will iterate over array 
* and return the index of the first element which matches the provided 
* regular expresion. 
* Note: This will not match on objects. 
* @param  {RegEx}   rx The regular expression to test with. E.g. /-ba/gim 
* @return {Numeric} -1 means not found */

if (typeof Array.prototype.reIndexOf === 'undefined') {
  Array.prototype.reIndexOf = function (rx) {
    for (var i in this) {
      if (this[i].toString().match(rx)) {
        return i;
      }
    }
    return -1;
  };
}