Iterate through array and return itself

Question

This code: p [1, 2].each{ "foo" } produces nil, whilst I want it to put [1, 2] after iteration. How-to in Crystal?

Answer 1

Use tap:

p [1, 2].tap &.each { "foo" } # => [1, 2]

It yields self to the block and then returns self.

Another option (not preferable) could be creating a custom method that simply returns self after doing each:

class Array
  def each_with_self
    each { |x| yield x  }
    self
  end
end

p [1, 2].each_with_self { "foo" } # => [1, 2]