INTERVIEW QUESTIONS PROGRAMMING LANGUAGES PERL DETAILS

Question: What's the significance of @ISA, @EXPORT @EXPORT_OK
%EXPORT_TAGS list & hashes in a perl package?
With example?

Answer: @ISA -> each package has its own @ISA array. this array keep track of classes it is inheriting.

ex:

package child;

@ISA=( parentclass);

@EXPORT this array stores the subroutins to be exported from a module.

@EXPORT_OK this array stores the subroutins to be exported only on request.

@ISA -> each package has its own @ISA array. this array keep track of classes it is inheriting.

ex:

package child;

@ISA=( parentclass);

@EXPORT this array stores the subroutins to be exported from a module.

@EXPORT_OK this array stores the subroutins to be exported only on request.
Source: CoolInterview.com

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