ruby - Single quote string interpolation to access a file in linux -

how make parameter file of method sound become file name of .fifo >extension using single quotes? i've searched , down, , tried many different >approaches, think need new set of eyes on one.

def sound(file) @cli.stream_audio('audio\file.fifo') end

alright got working, might not correct way seemed trick. first thing, there may have been white space interfering file parameter. used file.join option saw posted here few different people.

i used bit of each of answers really, , how came out:

    def sound(file)     file = file.strip     file = file.join('audio/',"#{file}.fifo")     @cli.stream_audio(file) if file.exist? file     end 

works charm! :d

ruby interpolation requires use double quotes.

is there reason need use single quotes?

def sound(file)   @cli.stream_audio("audio/#{file}.fifo") end 

as charles caldwell stated in comment, best way cross-platform file paths work correctly use file.join. using that, method this:

def sound(file)   @cli.stream_audio(file.join("audio", "#{file}.fifo")) end