Feature #12006: return IO object from IO#print, IO#puts, IO#close_read, IO#close_write,...

• Status: Open
• Assignee: -
• Target version: -

[duerst (Martin Dürst)]

There are a number of methods on IO objects that currently return nil.
It would be more convenient if they returned the object itself; that way, the methods could be chained.

Although some people might disagree with this style, this would allow e.g. to write something like

output = IO.popen(command, 'r+') do |pipe|
pipe << input
pipe.close_write
pipe.read
end

as:

output = IO.popen(command, 'r+') do |pipe|
pipe.print(input).close_write.read
end

[duerst (Martin Dürst)]

Here is another example: Simplfy
$stdout.puts "some message"
$stdout.flush

to:
$stdout.puts("some message").flush