Pass closure blocks to methods/functions as parameter arguments in crystal language

pass-closure-as-argument.cr

# idiotcoder.com

def example(&ex)
  ex.call()
end

example &-> {
  puts "sup"
}

example do
  puts "hey 2"
end

def example2(&ex2 : String ->)
  ex2.call("You'll have access to this string inside your closure")
end

example2 do |str|
  puts str
  puts "called after the str"
end

example2 &->(str : String) {
  puts str
  puts "hello"
}