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package Data::Gimei::Random; |
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# Pseudo random number generator(PRNG) |
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# Park & Miller comp.lang.c FAQ list Question 13.15 |
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use warnings; |
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use v5.22; |
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use Class::Tiny qw ( |
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seed |
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); |
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2587
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sub BUILDARGS { |
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#my $class = shift; |
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#my %args = @_; |
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my ( $class, %args ) = @_; |
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$args{'seed'} //= time(); |
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return \%args; |
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} |
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sub set_seed { |
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my ( $self, $seed ) = @_; |
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$self->seed( $seed ); |
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} |
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sub next_int { |
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my ( $self, $size ) = @_; |
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my $rnum = (48_271 * $self->seed) % (2 << 31 -1); |
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$self->seed( $rnum ); |
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return $rnum % $size; |
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} |
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sub sample { |
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my ( $self, $aref ) = @_; |
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my $index = $self->next_int($#$aref + 1); |
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return $aref->[$index]; |
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} |
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1; |