参考
https://qiita.com/kidach1/items/15cfee9ec66804c3afd2
# &でブロックを引数に
def exec_block(&block)
block.call
end
exec_block do
p "p_bloack"
end
####Proc
proc = Proc.new do
p "proc_new"
end
proc.call
#### yield
def exec_block2(&block)
yield
end
exec_block2 do
p "block2"
end