How to pass array to sub or gsub in ruby?

Question

I have an array of characters I want to be removed from a string:

stops = ["[", "]", "^", "(", ")", "#", "*", "?", "~"]

I want to be able to pass the array and have all occurrences of those chars removed so that:

"str [with] unwanted# char*acters"

becomes

"str with unwanted characters"

Answer 1

"str [with] unwanted# char*acters".gsub(Regexp.union(stops), '')
# => "str with unwanted characters"

Answer 2

If you need to remove characters you can use #delete

str.delete "[]^()#*?~"