Ana Perez Will Lowry

Efficient Development with Pry

Flatiron School Ruby-005

Jul-29-2014

• What is Pry?

PRY

• Why you will love Pry

• Setting up Pry

• Using Pry

WHAT IS PRY?

All modern scripting languages have an Eval function that allows to Read Eval

Print Loop (REPL)

PRY is a gem that can be used as an alternative to IRB. It allows you to step into your Ruby program

by acting as an interactive shell

WHY YOU WILL LOVE PRY?

Programming Time

50%Debugging

50%Productive

Source: Evans Data Corporation (2012), Payscale (2012) RTI (2002), CVP Surveys (2012)

WHY YOU WILL LOVE PRY?

Annual Software Development Wages

Annual Software Development Wages Spent on Debugging

Source: Evans Data Corporation (2012), Payscale (2012) RTI (2002), CVP Surveys (2012)

WHY YOU WILL LOVE PRY?

Get it right the first time!

SETUP

require ‘pry’

require ‘pry-rescue/rspec’

gem install pry

gem install pry-plus

SETUP

DEMO

COMMANDS RECAP

• show-doc • show-source • ls • cd • whereami • edit

• play • wtf? • wtf???? • cat—ex • try-again