Ruby Inside: The Ruby Blog
In math, a unary operation is an operation with a single input. In Ruby, a unary operator is an operator which only takes a single ‘argument’ in the form of a receiver. For example, the – on -5 or ! on !true. In contrast, a binary operator, such as in 2 + 3, deals with two arguments. Here, 2 and 3 (which become one receiver and one argument in a method call to +). Ruby only has a handful of unary
Pablotron: Wirble
Wirble is a set of enhancements for Irb. Wirble enables several items mentioned on the RubyGarden "Irb Tips and Tricks" page, including tab-completion, history, and a built-in ri command, as well as colorized results and a couple other goodies. The idea, of course, is to fill Irb with useful features without turning your ~/.irbrc file into swiss cheese. Using Wirble is simple, too. Here's what a
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