irb

As I am going through my journey by adopting the Ruby language, I spend a lot of time inside IRb. It's just fantastic! But, as I am not very aware of it's capabilities, and still a “nubby” with Ruby, I would like to know the following: How can I “flush” the session, without restarting IRb (or is this not possible). How can I configure IRb to load a bunch of source files "hello.rb" and "hello_objects.rb", i.e. at startup? I am heavily working in these and it would be nice to know a short hand to load these classes, without manually typing 'load' for each again. I'm not sure it's possible to

I am experiencing very strange behavior in Ruby 1.9.3's IRB with Mac OS 10.7.3 When I try to enter an Umlaut, it's escaped in the prompt and looks like this (I entered "ü" on the keyboard) irb(main):001:0> "\U+FFC3\U+FFBC" What's super strange is this: irb(main):001:0> "\U+FFC3\U+FFBC".length => 0 Of course, the character isn't displayed either: irb(main):001:0> "\U+FFC3\U+FFBC" => "" Does anyone know what's going on here or how to fix this? Victor Moroz didn't quite give the definitive answer but his link led me to a solution (thx!): I forgot to mention: Im running homebrew I built ruby using

Regarding the use of Rails console, when I make some change on a model, do I need to reload the rails console every time to make that change reflects? For example, I have my original code as follows: class Article < ActiveRecord::Base validates :title, :presence => true validates :body, :presence => true end Later, I want to add some additional attribute as below. class Article < ActiveRecord::Base validates :title, :presence => true validates :body, :presence => true def long_title "#{title} - #{published_at}" end end Does it need to run the command "reload!" every time to be able to do the

I just installed ruby 1.9.2 on windows machine and Backspace or any other arrow keys don't work. This happens only when I open IRB on Git Bash console. But it works fine on Windows console. Any help on that? Note: IRB was working fine on both consoles with the earlier versions of ruby. Same thing happened to me. Running irb with --noreadline solved my problem: irb --noreadline Seems you didn't have readline installed while compile ruby. So install readline, maybe also readline-devel, then recompile ruby. You can also disable readline in ~/.irbrc IRB.conf[:USE_READLINE] = false As documented

I am writing a Ruby script for use in the Rails environment, but I chose to run it from irb because reloading the Rails console can be a pain. Now the wait time is much shorter from irb, but I'm bothered that I have to restart irb and require the script everytime I make a change. Is there a simpler way of reloading a script from irb? I found a method in this thread , but that only applies to gem files apparently. My require statement looks like this require "#{File.expand_path(__FILE__)}/../lib/query" EDIT: Having tried load rather than require , I still couldn't get it to work. I can't get a

Can I drop to an IRB prompt from a running Ruby script? I want to run a script, but then have it give me an IRB prompt at a point in the program with the current state of the program, but not just by running rdebug and having a breakpoint. you can use ruby-debug to get access to irb require 'rubygems' require 'ruby-debug' x = 23 puts "welcome" debugger puts "end" when program reaches debugger you will get access to irb. Pry (an IRB alternative) also lets you do this, in fact it was designed from the ground up for exactly this use case :) It's as easy as putting binding.pry at the point you