How to simplify split, iterate.each and join in ruby? -- Ruby beginner

Question

words = self.tag.split
words.each { |word| word = word.stem }
self.tag = words.join(' ')

For a given sentence I want to perform the stem action on each individual word.

Is there a way to simplify this code?

Answer 1

self.tag = self.tag.split.map(&:stem).join(' ')

Answer 2

self.tag = self.tag.split.collect { |w| word.stem }.join(' ')

Not that I necessarily recommend doing so.