例如,以下代码中是否存在do会影响程序的行为吗？
while true do
puts "Hi"
break
end
while true
puts "Hi"
break
end
解决方法
根据
The Ruby Programming Language书第5.2.1节：
The
dokeyword in awhileoruntilloop is like thethenkeyword in an
ifstatement: it may be omitted altogether as long as a newline (or
semicolon) appears between the loop condition and the loop body.
所以,不,它不会改变行为,它只是可选语法.