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rubyのblockの使い方

Posted at

blockとは

do ~ endで囲われた引数でyieldで呼び出すことができる

#def give_block( &block )
def give_block
  p 'block comes here'
  yield
end

give_block do
  p 'It called'
end

block.rb を実行すると以下のようにブロック内の` 'block comes here'とblockで渡された'It called'が表示される

"block comes here"
"It called"
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