Rubyc

Transcript

1. Rubyc Martin Chabot Thursday, 20 September, 12

2. File Processing Thursday, 20 September, 12

3. Unix Tools • grep • find • xargs • sed

   • awk • ... Thursday, 20 September, 12

4. Do you need to look at documentation to use sed

   & awk? Thursday, 20 September, 12

5. If no, this presentation is not for you! Thursday, 20

   September, 12

6. Otherwise, Why don’t you use Ruby? Thursday, 20 September, 12

7. ruby -n -e Thursday, 20 September, 12

8. Ruby’s man pages Thursday, 20 September, 12

9. Example cat my_file | ruby -n -e "print if /wombat/"

   Thursday, 20 September, 12

10. ruby -p -e Thursday, 20 September, 12

11. Ruby’s Man Pages Thursday, 20 September, 12

12. ruby -r Thursday, 20 September, 12

13. Ruby’s man Pages Thursday, 20 September, 12

14. Ruby 1.8 • Can only have one -r option •

    You cannot use it with rubygems Thursday, 20 September, 12

15. Thursday, 20 September, 12

16. Ruby 1.9 • Can only have many -r options •

    eg: -r rubygems -r csv Thursday, 20 September, 12

17. Rubyc Gem • Supports Enumerable methods: map, select etc. •

    Iterates on each line • Sets the ‘line’ variable and its ‘l’ alias • Sets the ‘lnum’ and the ‘index’ variable Thursday, 20 September, 12

18. Example Thursday, 20 September, 12

19. Thursday, 20 September, 12

20. Rubyc commands Thursday, 20 September, 12

21. Use Case I Colorize stderr Thursday, 20 September, 12

22. The shell way rake 2> >(while read line;do echo -e

    "\033[31m$line \033[0m";done) Thursday, 20 September, 12

23. The Ruby 1.9 Way rake 2> >(ruby -r colorize -p

    -e ‘$_ = $_.red’) Thursday, 20 September, 12

24. rake 2> >(rubyc map -r colorize ‘l.red’) The Rubyc Way

    Thursday, 20 September, 12

25. Use Case II Extract the number of insertions per db

    table in a Rails log file Thursday, 20 September, 12

26. The Shell Way To lazy to work on it !

    Thursday, 20 September, 12

27. The Ruby Way To lazy too ! Thursday, 20 September,

    12

28. The Rubyc Way Thursday, 20 September, 12

29. Conclusion • If you feel confortable with ruby’s -n -p

    options continue using it. • If your like me, give Rubyc a chance. • Give me some feedback Thursday, 20 September, 12