Ruby 中这些块编码样式的区别或价值是什么? [英] What is the difference or value of these block coding styles in Ruby?

问题描述

哪种风格更受欢迎?一个与另一个有充分的理由吗?

Which style is preferred? Is there a good reason for one vs. the other?

提前致谢！

1) cmds.each do |cmd|
   end

2) cmds.each { |cmd|
   }

示例代码:

cmds = [ "create", "update", "list", "help" ]

# Block style one
#
cmds.each do |cmd|
  puts "loop1, cmd: #{cmd}"
end

# Block style two
#
cmds.each { |cmd|
  puts "loop2, cmd: #{cmd}"
}

推荐答案

rails 团队和许多其他 ruby​​ists 更喜欢对单行块使用花括号，对多行块使用do...end.

The rails team and many other rubyists prefer to use curly braces for one line blocks and do...end for multi-line ones.

两者之间唯一的功能区别是 do...end 块的优先级低于 {...} 块的优先级.

The only functional difference between the two is that the precedence of a do...end block is lower than that of a {...} block.

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