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Ruby Programming
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class NilClass
Parent: Object
Version: 1.6

Index:

& ^ | nil? to_a to_i to_s


The class of the singleton object nil.

instance methods
& nil& anObject -> false

And---Returns false. As anObject is an argument to a method call, it is always evaluated; there is no short-circuit evaluation in this case.

nil && puts("logical and")
nil &  puts("and")
produces:
and

^ nil^ anObject -> true or false

Exclusive Or---Returns false if anObject is nil or false, true otherwise.

| nil| anObject -> true or false

Or---Returns false if anObject is nil or false, true otherwise.

nil? nil.nil? -> true

Always returns true.

to_a nil.to_a -> []

Always returns an empty array.

to_i nil.to_i -> 0

Always returns zero.

to_s nil.to_s -> ""

Always returns the empty string.


Ruby Programming
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