We can split the value of a string into an array of variables using the split function. Let's have a look at a quick example that demonstrates this:
irb(main):001:0> a = "mastering,metasploit"
=> "mastering,metasploit"
irb(main):002:0> b = a.split(",")
=> ["mastering", "metasploit"]
irb(main):003:0> b[0]
=> "mastering"
irb(main):004:0> b[1]
=> "metasploit"
We can see that we have split the value of a string from the "," position into a new array, b. The "mastering,metasploit" string now forms the 0th and 1st element of the array, b, containing the values "mastering" and "metasploit", respectively.
