A symbol is a unique string. Its value is itself. A symbol is not a variable which has a value. But a variable may contain a value. Have fun learning and do not hesitate asking questions. Stef On Apr 8, 2009, at 3:56 AM, Mariano Martinez Peck wrote:
On Tue, Apr 7, 2009 at 10:47 PM, Andrey Larionov <anlarionov@gmail.com> wrote: Is symbol may contain a value?
As I understand it, the symbol is the value itself. Suppose you use #something. Everywhere in the image you use #something, you will be talking about the same symbol. They don't have a dynamic value as String. I mean, in String you set it a value. In symbols, they already are the value. They are literal.
I don't know If I am being clear enough.
Greetings,
Mariano
2009/4/8 Mariano Martinez Peck <marianopeck@gmail.com>:
On Tue, Apr 7, 2009 at 9:21 PM, Andrey Larionov <anlarionov@gmail.com
wrote:
Two test in FontTest assumes what TextStyle>>default will answer a some Accuny font with some size. But if we override default font - test will fail. I'll try to find solution and fix, but new vm and image crashed during debuging. I think solution will be to create corresponding TextStyle for
test.
Also i'm a newbie and can some clarify what is DefaultTextStyle? It not declared as instance or class variable.
I am also a but newbie but I think that's a symbol Is it actually #DefaultTextStyle ?
If true, yes, it would probably be a symbol. A symbol, as Squeak By Example says is:
" Symbols are like Strings, in that they contain a sequence of characters. However, unlike a string, a literal symbol is guaranteed to be globally unique. There is only one Symbol object #Hello but there may be multiple String objects with the value 'Hello'. "
See SBE for more documentation.
However, if there is something that it is not a class neither a class variable, it can be a global variable. For example, do a expect it of Smalltalk. You may think Smalltalk is a class, but it doesn't. It is global variable. Indeed it is an object of SystemDirectory.
Cheers,
Mariano
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