CONFIRM THE ENDING

Challenge here was to check if a string (first argument) ends with the given target string (second argument).

With some helpful link as below:

• String.substr()

The total concentration should be on the above-mentioned function(link above) to efficiently solve the problem.

Full syntax is

str.substr(start[, length])

start

Location at which to begin extracting characters. If a negative number is given, it is treated as strLength + start where strLength is the length of the string (for example, if start is -3 it is treated as strLength - 3.)

 

length

 

Optional. The number of characters to extract.

The problem was straight forward, my solution is as below:- 

 function end(str, target) {

     var x = str.substr(-target.length , target.length);

     if (x === target){

         return true;

     } else {

         return false;
     }

}