struct Symbol

Overview

A symbol is a constant that is identified by a name without you having to give it a numeric value.

:hello
:welcome
:"123"
:"symbol with spaces"

See Symbol literals in the language reference.

Internally a symbol is represented as an Int32, so it's very efficient.

You can't dynamically create symbols. When you compile your program, each symbol gets assigned a unique number.

Included Modules

Defined in:

objects.cr

Instance Method Summary

Instance methods inherited from class Object

to_xml(io : IO, *, indent : XMLT::IndentOptions = nil) : Nil
to_xml(*, indent : XMLT::IndentOptions = nil) : String to_xml

Class methods inherited from class Object

from_xml(xml : String)
from_xml(node : XML::Node)
from_xml(xml : String, *, root : String)
from_xml(node : XML::Node, *, root : String) from_xml

Instance Method Detail

def to_xml(xml : XML::Builder) : Nil #

[View source]
def to_xml(io : IO, *, key : String | Nil = nil, indent : XMLT::IndentOptions = nil) : Nil #

[View source]
def to_xml(*, key : String | Nil = nil, indent : XMLT::IndentOptions = nil) : String #

[View source]