One-liner program example

ruby-talk
1

Ruby 1.9.3

I want to practice one-liner programs which are the programs written and
executed in command lines interactively.
I have no experience in Perl, so I need to do this with Ruby (or
shell-script).

Say, I have a Ruby script

  eliminate_duplication.rb

which takes one file input like

  eliminate_duplication.rb file_A.csv

Also I have the whole set of files named

  file_A.csv file_B.csv file_C.csv ...(up to Z)

Could anyone show me examples of one-liner program which apply the
script "eliminate_duplication.rb" to every file in that directory?

Thanks

soichi

···

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2

Dir.glob("*.csv").each { |f| `eliminate_duplication.rb #{f}` }

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On Nov 4, 2012 5:52 PM, "Soichi Ishida" <lists@ruby-forum.com> wrote:

Ruby 1.9.3

I want to practice one-liner programs which are the programs written and
executed in command lines interactively.
I have no experience in Perl, so I need to do this with Ruby (or
shell-script).

Say, I have a Ruby script

  eliminate_duplication.rb

which takes one file input like

  eliminate_duplication.rb file_A.csv

Also I have the whole set of files named

  file_A.csv file_B.csv file_C.csv ...(up to Z)

Could anyone show me examples of one-liner program which apply the
script "eliminate_duplication.rb" to every file in that directory?

Thanks

soichi

--
Posted via http://www.ruby-forum.com/\.

3

Or at the shell:

find . -name \*.csv -exec ruby eliminate_duplication.rb '{}' \;
for i in file_[A-Z].csv; do ruby eliminate_duplication.rb $i; done

···

On Monday, 5 November 2012 at 12:52 PM, Soichi Ishida wrote:

Ruby 1.9.3

I want to practice one-liner programs which are the programs written and
executed in command lines interactively.
I have no experience in Perl, so I need to do this with Ruby (or
shell-script).

Say, I have a Ruby script

eliminate_duplication.rb

which takes one file input like

eliminate_duplication.rb file_A.csv

Also I have the whole set of files named

file_A.csv file_B.csv file_C.csv ...(up to Z)

Could anyone show me examples of one-liner program which apply the
script "eliminate_duplication.rb" to every file in that directory?

Thanks

soichi

--
Posted via http://www.ruby-forum.com/\.

4

Thank you so much!

soichi

···

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Posted via http://www.ruby-forum.com/.