Zomg: Ruby Command Line and Ruby Debugging
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This document discusses command line applications and debugging techniques without puts statements. It recommends using helpful command line apps that avoid destructive behavior and provide full help. For command line parsing, GLI is recommended. PRY and debugger are debugging tools that allow inspecting and stepping through code without puts.
Zomg: Ruby Command Line and Ruby Debugging
- 1. ZOMG: CLI and no puts Jesse Wolgamott @jwo | houston.rb Meeting
- 2. Part 1 David Copeland awesome command line apps
- 3. Command Line Apps • What makes a Command Line App? • Follow the unix way
- 6. Be Helpful
- 7. Two Kinds of Command Lines
- 8. • Simple utility (think ls, or grep) • Command suite (think github’s, with multiple commands)
- 9. Helpful Apps do not destroy
- 10. my_cmd -> nothing destructive my_cmd -h -> full help statement my_cmd help command -> full help for that command
- 11. List of Gems
- 12. Gem why For? GLI Command Suite Options Choices or OptionParser Utility Options Aruba Cuke Tests Terminal-Table Format output in tables Rainbow Color output
- 13. Note: Choice is probably only good for 1.8 apps But I kinda like it And didn’t have an OptionParser Example
- 14. FREAL, look at GLI
- 15. Sample Lorem Ipsum created using GLI https://github.com/jwo/ Ipster/
- 16. Part 2 jim weirich debugging the safari
- 17. Debugging, no puts
- 19. PRY ruby -rpry convert.rb 98.6 def index @articles = Article.all binding.pry end
- 20. Also, there’s a railscast!
- 21. PRY is good for • Can use ls to list variables • Can inspect variables • Can cd into an @variable • Inspects State.
- 22. How To Start items.each do |item| debugger #bam
- 23. What you can do l #where am I # to go to next: n #next method # to go into the next method s #step into # to evaluate ruby : e item #evaluate item, so it'll inspect it # display ruby expression with each step displ # displ Item.count •
- 24. Da Gems Ruby 1.9 gem “ruby-debug19” Ruby 1.8 gem “ruby-debug”