sloth

Sloth

Sloth is a Ruby gem that implements the lazy() function as robustly as possible.

Installation

gem install sloth

Usage

require 'sloth'
obj = lazy{:sloth}
obj.to_s # => 'sloth'

Hunting Sloths

Sloths can only (easily) be detected by the sloth? method.

sloth = lazy{:sloth}

sloth.sloth?       # => true
sloth.class        # => Symbol
:sloth.sloth?      # => false
sloth.is_a?(Sloth) # => false
Sloth === sloth    # => false

The evaluated? method can tell whether a Sloth has been evaluated.

sloth = lazy{'sloth'}

sloth.evaluated? # => false
"lazy #{sloth}s"
sloth.evaluated? # => true

nil and false

Unfortunately, Ruby doesn't provide any easy way to override the behavior of if, so

if lazy{false}
	puts('fail')
else
	puts('success')
end

will puts('fail'). A workaround has been implemented via the self() method, which has been defined on Object. Therefore,

if lazy{false}.self
	puts('fail')
else
	puts('success')
end

will puts('success').

License

Sloth is in the public domain.