Ruby - 评论

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注释是 Ruby 代码中的注释行，在运行时会被忽略。单行注释以 # 字符开头，它们从 # 延伸到行尾，如下所示 -

#!/usr/bin/ruby -w
# This is a single line comment.

puts "Hello, Ruby!"

执行时，上述程序产生以下结果 -

Hello, Ruby!

Ruby 多行注释

您可以使用=begin和=end语法注释多行，如下所示 -

#!/usr/bin/ruby -w

puts "Hello, Ruby!"

=begin
This is a multiline comment and con spwan as many lines as you
like. But =begin and =end should come in the first line only. 
=end

执行时，上述程序产生以下结果 -

Hello, Ruby!

确保尾随注释距离代码足够远，并且易于区分。如果块中存在多个尾随注释，请将它们对齐。例如 -

@counter      # keeps track times page has been hit
@siteCounter  # keeps track of times all pages have been hit