How does nil and false differ?

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natchiar

  • Aug 18th, 2007
 

The difference of the methods nil and false is shown by executing nil.methods - false.methods and false.methods - nil.methods.

In a Hash, nil cannot be a value, but false can.

It is recommened that a method returns true or false if it is a predicate, and a value or nil otherwise.

A method with suffix ? is usually a predicate, but some built-in functions are not.

Manikandan Mca

  • Aug 18th, 2007
 

False is a boolean datatype
Nil is not a data type

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