command line argument -- ruby
 

i'm a java c/c++ person. trying out ruby for the 1st time!

how do i do something like this in ruby:

//this is java 

public static void main ( String args [] ) {

        File inFile  = new File ( args [ 0 ] ); 

        File outFile = new File ( args [ 1 ] );

DataInputStream reader = new DataInputStream ( new BufferedInputStream ( new FileInputStream ( inFile ) ) );

                BufferedWriter writer = new BufferedWriter ( new FileWriter ( outFile ) );

String str;

while (str = reader.readline() != null){

writer.write (str);

}

}

note that this code may not compile i pulled it off of a java program i did a while back.

drjay

Re: command line argument -- ruby
 

well i figured it out btw. so for anyone in the future looking to do something similar to the java code above:

#arguments

inFile = ARGV[0] 

outFile = ARGV[1]



def foo(infile, outfile)

        begin

                puts "Opening input file..."

                fin = File.open(inFile, "r")

                puts "Creating output file..."                

                fout = File.open(outFile, "w")

                puts "Reading from input file and writing to output file..."                

                str = ins.readlines()

                fout.puts str

                puts "Closing files..."

                fin.close

                fout.close

                puts "Process complete!"

        rescue => err

                puts "Exception: #{err}"

                err

        end

end



foo(inFile,  outFile)

takes in 2 files as command line arguments. 1st file being the input file and the second being the output file. then it writes the input to the output file.

happy coding

drjay!

Re: command line argument -- ruby
 

Guess I'm late for the party but a simpler way of doing it would be:

require 'fileutils'

FileUtils.copy_file(ARGV[0], ARGV[1])