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Re:Ruby basics (1 viewing) (1) Guest
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TOPIC: Re:Ruby basics
#4391
ShriNi (User)
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Re:Ruby basics 3 Years, 10 Months ago Karma: 0  
Ruby Local Variables


Local variables begin with a lowercase letter or _.

The scope of a local variable ranges from class, module, def, or do to the corresponding end or from a block's opening brace to its close brace {}.
 
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#4392
ShriNi (User)
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Re:Ruby basics 3 Years, 10 Months ago Karma: 0  
When an uninitialized local variable is referenced, it is interpreted as a call to a method that has no arguments
 
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#4393
ShriNi (User)
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Re:Ruby basics 3 Years, 10 Months ago Karma: 0  
Assignment to uninitialized local variables also serves as variable declaration.

The variables start to exist until the end of the current scope is reached. The lifetime of local variables is determined when Ruby parses the program
 
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#4394
ShriNi (User)
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Re:Ruby basics 3 Years, 10 Months ago Karma: 0  
Assignment to uninitialized local variables also serves as variable declaration.

The variables start to exist until the end of the current scope is reached.

The lifetime of local variables is determined when Ruby parses the program.
 
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#4395
ShriNi (User)
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Re:Ruby basics 3 Years, 10 Months ago Karma: 0  
Ruby Constants:

Constants begin with an uppercase letter.

Constants defined within a class or module can be accessed from within that class or module, and those defined outside a class or module can be accessed globally
 
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#4396
ShriNi (User)
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Re:Ruby basics 3 Years, 10 Months ago Karma: 0  
Constants may not be defined within methods.

Referencing an uninitialized constant produces an error.

Making an assignment to a constant that is already initialized produces a warning.
 
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