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Programming Ruby The Pragmatic Programmer's Guide |
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class Symbol
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Parent:
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Object
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Version:
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1.6
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Index:
id2name
inspect
to_i
to_s
A Symbol object represents a Ruby name and is generated
automatically using the :name literal syntax. The same Symbol
object will be created for a given name string for the duration of a
program's execution, regardless of the context or meaning of that
name. Thus if Fred is a constant in one context, a method in
another, and a class in a third, the Symbol :Fred will be
the same object in all three contexts.
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module One
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class Fred
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end
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$f1 = :Fred
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end
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module Two
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Fred = 1
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$f2 = :Fred
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end
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def Fred()
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end
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$f3 = :Fred
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$f1.id
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2305294
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$f2.id
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2305294
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$f3.id
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2305294
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instance methods
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id2name
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sym.id2name -> aString
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Returns the name corresponding to sym.
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inspect
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sym.inspect -> aString
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Returns the representation of sym as a symbol literal.
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to_i
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sym.to_i -> aFixnum
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Returns an integer that is unique for each symbol within a
particular execution of a program.
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to_s
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sym.to_s -> aString
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Synonym for
Symbol#id2name
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Extracted from the book "Programming Ruby -
The Pragmatic Programmer's Guide"
Copyright
©
2001 by Addison Wesley Longman, Inc. This material may
be distributed only subject to the terms and conditions set forth in
the Open Publication License, v1.0 or later (the latest version is
presently available at http://www.opencontent.org/openpub/)).
Distribution of substantively modified versions of this document is
prohibited without the explicit permission of the copyright holder.
Distribution of the work or derivative of the work in any standard
(paper) book form is prohibited unless prior permission is obtained
from the copyright holder.
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