til/ruby/evaluating-one-off-commands.md

Evaluating One-Off Commands

When I need to quickly test something out in Ruby, I will often reach for irb. However, there is an even quicker way to send a line of code to ruby for evaluation. Use the ruby binary with the -e flag followed by your line of ruby. For instance,

$ ruby -e 'puts Class.ancestors'
[Class, Module, Object, Kernel, BasicObject]