Ruby comments

Ruby comments

Comments are comment lines within Ruby code that are ignored at run time. A single-line comment starts with the character , until the line ends, as follows:

When executed, the above program produces the following results:

Hello, Ruby!

Ruby multi-line comments

You can comment on more than one line using the syntax of s begin and s end, as follows:

#!/usr/bin/ruby -w

puts "Hello, Ruby!"

=begin
这是一个多行注释。
可扩展至任意数量的行。
但 =begin 和 =end 只能出现在第一行和最后一行。 
=end

When executed, the above program produces the following results:

Hello, Ruby!

Make sure that the comments at the end are enough distance from the code to make it easy to distinguish between comments and code. I f there is more than one tail comment in the block, align them. For example:

@counter      # 跟踪页面被击中的次数
@siteCounter  # 跟踪所有页面被击中的次数