小编Hug*_*zio的帖子

我想将参数传递给Proc,就像使用splat一样,但它返回一个错误wrong number of block arguments (1 for 0)

$callbacks = {} of String => Array(->)

def add_callback(event, &block)
  begin
    $callbacks[event.to_s] << block
  rescue
    $callbacks[event.to_s] = [block]
  end
end

add_callback(:event) do |arg|
  puts "event!"
end

$callbacks["event"].first.call

Error in line 11: wrong number of block arguments (1 for 0) http://carc.in/#/r/7gw