As you’ve already discovered, self does not refer to the object where IRB was started, but to the TOPLEVEL_BINDING, which seems to be an instance of the Object class itself. You can still run an IRB session with a specific class or object as the context, but it’s not as simple as just starting IRB. … Read more
None of these worked for me, but this did: irb -I . >require ‘file’ => true
Use Pry: https://github.com/pry/pry Let’s you: start sessions at runtime view method source code view method documentation (not using RI so you dont have to pre-generate it) pop in and out of different contexts syntax highlighting gist integration view and replay history open editors to edit method using edit-method obj.my_method syntax A tonne more great and … Read more
Same thing happened to me. Running irb with –noreadline solved my problem: irb –noreadline
About a year ago, the “run” command was added to foreman ref: https://github.com/ddollar/foreman/pull/121 You can use it as follow: foreman run rails console or foreman run rake db:migrate
Yes, you need to call reload! as this will clear the loaded constants that have been loaded and will load them as they’re referenced in the console. If you have old objects from before the reload! you will need to call reload on these individual objects or find new objects and work with them if … Read more
In Ruby 1.9.2 the Powers that Be introduced an explicit change so that the working directory is no longer in the Ruby path. I thought it was the Apocalypse and a terrible thing, until I learned about require_relative. My apps tend to look like this: require ‘some_gem’ require ‘another_gem’ require_relative ‘lib/init’ And then lib/init.rb can … Read more
If you just want to suppress long output once in a while, use ;0, like: a = [*1..10000];0 # => 0 If you want to suppress it generally, use the ~/.irbrc file. The IRB.conf[:INSPECT_MODE] and IRB.conf[:PROMPT][your_prompt][:RETURN] control what is returned. You can figure out what your_prompt is by checking IRB.conf[:PROMPT_MODE] Example: IRB.conf[:PROMPT][:DEFAULT][:RETURN] = “” # … Read more
I’m not entirely sure of what you mean by the ‘current objects’. You can iterate over ObjectSpace, as has been mentioned already. But here are a few other methods. local_variables instance_variables global_variables class_variables constants There’s one gotcha. They must be called at the right scopes. So right in IRB, or in an object instance or … Read more
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 want to start the session: require ‘pry’ x = 10 binding.pry And inside the session: pry(main)> puts x => 10 Check … Read more