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