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Re:Ruby basics (1 viewing) (1) Guest
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TOPIC: Re:Ruby basics
#4385
ShriNi (User)
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Re:Ruby basics 3 Years, 10 Months ago Karma: 0  
Ruby Global Variables


Global variables begin with $. Uninitialized global variables have the value nil and produce warnings with the -w option.
 
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#4386
ShriNi (User)
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Re:Ruby basics 3 Years, 10 Months ago Karma: 0  
Assignment to global variables alters global status. It is not recommended to use global variables. They make programs cryptic.
 
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#4387
ShriNi (User)
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Re:Ruby basics 3 Years, 10 Months ago Karma: 0  
In Ruby we can access value of any variable or constant by putting a hash (#) character just before that variable or constant
 
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#4388
ShriNi (User)
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Re:Ruby basics 3 Years, 10 Months ago Karma: 0  
Ruby Instance Variables


Instance variables begin with @. Uninitialized instance variables have the value nil and produce warnings with the -w option
 
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#4389
ShriNi (User)
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Re:Ruby basics 3 Years, 10 Months ago Karma: 0  
Ruby Class Variables:

Class variables begin with @@ and must be initialized before they can be used in method definitions
 
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#4390
ShriNi (User)
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Re:Ruby basics 3 Years, 10 Months ago Karma: 0  
Referencing an uninitialized class variable produces an error.

Class variables are shared among descendants of the class or module in which the class variables are defined.

Overriding class variables produce warnings with the -w option
 
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