Question

In other languages, in RegExp you can use /.../g for a global match.

However, in Ruby:

"hello hello".match /(hello)/

Only captures one hello.

How do I capture all hellos?

Answer 1

You can use the scan method. The scan method will either give you an array of all the matches or, if you pass it a block, pass each match to the block.

"hello1 hello2".scan(/(hello\d+)/)   # => [["hello1"], ["hello2"]]

"hello1 hello2".scan(/(hello\d+)/).each do|m|
  puts m
end

I’ve written about this method, you can read about it here near the end of the article.