How do I remove all characters in a string until a substring is matched, in Ruby?

Question

Say I have a string: Hey what\'s up @dude, @how\'s it going?

I\'d like to remove all the characters before@how\'s.

Answer 1

Use String#slice

s = "Hey what's up @dude, @how's it going?"
s.slice(s.index("@how")..-1)
# => "@how's it going?"