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lib/Cheat/Sheet/Util.agi  view on Meta::CPAN

    --Sparky Anderson

#-#========================================================================#-#
#-#=====# # UTILITY MODULES
#-#                             # [<-44 cols to end                78 cols ->]
#-#                             # #2345678901234567890123456789012345678901234
#-#
#=head2 Scalar::Util
use Scalar::Util;               # General-utility scalar subroutines
use Scalar::Util qw(
    weaken isweak reftype refaddr blessed isvstring readonly tainted 
    dualvar looks_like_number openhandle set_prototype 
);
    weaken $ref;            # $ref will not keep @$ref, %$ref, etc. from GC
                            # note: copies of weak refs are not weak
    $bool = isweak  $ref;       # true if $ref is a weak reference
    $type = reftype $ref;       # 'SCALAR', 'ARRAY', 'HASH', or undef
    $addr = refaddr $ref;       # machine address of $ref or undef
    $got  = blessed $ref;       # class of blessed ref or undef 
    $bool = isvstring $s;       # true if $s is a v-string
    $bool = readonly  $s;       # true if $s is a readonly scalar
    $bool = tainted   $s;       # true if $s is tainted
    $got  = dualvar $num, $string;      # $got is $num or $string in context 
    $bool = looks_like_number $n;       # true if $n can be a number

lib/Cheat/Sheet/Util.perl  view on Meta::CPAN

# =  Copyright 2011 Xiong Changnian <xiong@cpan.org>   =
# = Free Software = Artistic License 2.0 = NO WARRANTY =
#                                                               v0.0.5
# I only had a high school education and believe me,
# I had to cheat to get that. 
# --Sparky Anderson
#----------------------------------------------------------------------------#

use Scalar::Util;               # General-utility scalar subroutines
use Scalar::Util qw(
    weaken isweak reftype refaddr blessed isvstring readonly tainted 
    dualvar looks_like_number openhandle set_prototype 
);
    weaken $ref;            # $ref will not keep @$ref, %$ref, etc. from GC
                            # note: copies of weak refs are not weak
    $bool = isweak  $ref;       # true if $ref is a weak reference
    $type = reftype $ref;       # 'SCALAR', 'ARRAY', 'HASH', or undef
    $addr = refaddr $ref;       # machine address of $ref or undef
    $got  = blessed $ref;       # class of blessed ref or undef 
    $bool = isvstring $s;       # true if $s is a v-string
    $bool = readonly  $s;       # true if $s is a readonly scalar
    $bool = tainted   $s;       # true if $s is tainted
    $got  = dualvar $num, $string;      # $got is $num or $string in context 
    $bool = looks_like_number $n;       # true if $n can be a number

lib/Cheat/Sheet/Util.pod  view on Meta::CPAN

=item * L</ List::Compare>

=item * L</ Hash::Util>

=back

=head2  Scalar::Util

    use Scalar::Util;               # General-utility scalar subroutines
    use Scalar::Util qw(
        weaken isweak reftype refaddr blessed isvstring readonly tainted
        dualvar looks_like_number openhandle set_prototype
    );
        weaken $ref;            # $ref will not keep @$ref, %$ref, etc. from GC
                                # note: copies of weak refs are not weak
        $bool = isweak  $ref;       # true if $ref is a weak reference
        $type = reftype $ref;       # 'SCALAR', 'ARRAY', 'HASH', or undef
        $addr = refaddr $ref;       # machine address of $ref or undef
        $got  = blessed $ref;       # class of blessed ref or undef
        $bool = isvstring $s;       # true if $s is a v-string
        $bool = readonly  $s;       # true if $s is a readonly scalar
        $bool = tainted   $s;       # true if $s is tainted
        $got  = dualvar $num, $string;      # $got is $num or $string in context
        $bool = looks_like_number $n;       # true if $n can be a number