在Ruby中將命名參數與塊一起使用

Question

我曾經有這種方法：

def send_action(action, &success_block)

end

我可以這樣稱呼它：

send_action('PAIR') do
  pp 'test
end

現在，我想添加一個可選參數：

def send_action(action, uuid = nil, &success_block)

end

但這似乎不起作用（我可以）。 所以我嘗試用命名參數編寫它：

def send_action(action:, uuid: nil, &success_block)

end

但是如何將命名參數與塊結合在一起？

Answer 1

兩者都適用於Ruby 2.4.4和2.6.4。 這是帶有位置參數的演示。

def send_action(action, uuid = nil, &success_block)
  p "#{action} #{uuid}"
  success_block.call
end

send_action("foo") { p 99 }
"foo "
99

send_action("foo", "bar") { p 99 }
"foo bar"
99

並帶有命名參數。

def send_action(action:, uuid: nil, &success_block)
  p "#{action} #{uuid}"
  success_block.call
end

send_action(action: "foo") { p 99 }
"foo "
99

send_action(action: "foo", uuid: "bar") { p 99 }
"foo bar"
99