Feature #21455: Add a block argument to Array#join

• Status: Open
• Assignee: -
• Target version: -

[leoarnold (Leo Arnold)]

I sometimes come across code like this where
the Array#join at the end can easily
be overlooked or stands out like a sore thumb:

hex_string = string.bytes.map do |byte|
  format('%02X', byte)
end.join(' ')

It seems idiomatic and more succinct
to pass the block to Array#join directly:

hex_string = string.bytes.join(' ') do |byte|
  format('%02X', byte)
end

Pull Request: https://github.com/ruby/ruby/pull/13731

[leoarnold (Leo Arnold)]

• Description updated (diff)

[leoarnold (Leo Arnold)]

• Description updated (diff)

[mame (Yusuke Endoh)]

• Related to Feature #21386: Introduce `Enumerable#join_map` added