Q.

Description:
Write a function that when given a URL as a string, parses out just the domain name and returns it as a string. For example:

domainName("http://github.com/carbonfive/raygun") == "github"
domainName("http://www.zombie-bites.com") == "zombie-bites"
domainName("https://www.cnet.com") == "cnet"

A)

function domainName(url){
  url = url.replace("http://","").replace("https://","").replace("www.","");
  return url.slice(0,url.indexOf("."))    
}