BFX Helper Functions

gistfile1.txt

/* 

This is an open Javascript library for the Borderfree BFX team. Included in this file will be
helper functions that can be incorperated into BFX projects.

Please leave comments above your code for readability.

*/

// str.nthIndexOf(str,int) string method that grabs the substring at nth index.
String.prototype.nthIndexOf = function(sub,index){
    if(typeof sub === 'string' && typeof index === 'number'){
        var count = 0;
        for(var i=0; i < this.length;i++){
            if(this[i] === sub){
                if(count === (index - 1)){
                    return i;
                }
                count++; 
            }   
        }
    }else{
        console.error("Wrong datatype for parameters.");
    }
}