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Perl in a Nutshell, 2nd Edition
book

Perl in a Nutshell, 2nd Edition

by Nathan Patwardhan, Ellen Siever, Stephen Spainhour
June 2002
Beginner content levelBeginner
759 pages
80h 42m
English
O'Reilly Media, Inc.
Content preview from Perl in a Nutshell, 2nd Edition

strict

Pragma for doing strict error checking within the current block. Can be turned off by prefixing with no:

use strict 'vars'; 
... 
no strict 'vars';

Provides three kinds of restriction:

strict 'refs'

Generates runtime error if you use any symbolic references.

strict 'subs'

Generates compile-time error if you use a bareword identifier that’s not a predeclared subroutine.

strict 'vars'

Generates compile-time error if you access a variable that wasn’t declared via my, isn’t fully qualified, or wasn’t imported.

use strict by itself (with no import list) is the most restrictive, causing all possible restrictions to be imposed.

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Publisher Resources

ISBN: 0596002416Errata Page