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# 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]
```