.join(" ")?

Ruby
1

In the below program,


def translate(words)
  words.split(" ").map do |word|
    vowel = first_vowel(word)
    word = word.slice(vowel..-1) + word[0,vowel] + "ay"
  end.join(" ")

end

why is there a .join right after the first block?

2

split() takes a string and returns an array
map() takes an array, modifies each item and returns a new array
join() turns the array back into a string putting a space between each item

It is a little odd to see methods directly after a block but it can be done because the block returns a value that can have methods called on it.
It’s more common to see this done with simple blocks on one line.

words.map{ |word| word + "ay" }.join(" ")
3

is that the best way

4

When the blocks have more than one line of code it’s standard to use do and end.
Something like this may be more readable.

def translate(words)
  words = words.split(" ").map do |word|
    vowel = first_vowel(word)
    word.slice(vowel..-1) + word[0,vowel] + "ay"
  end

  words.join(" ")
end
5

thx