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.\" ========================================================================
.\"
.IX Title "Declare::Constraints::Simple::Library::Array 3pm"
.TH Declare::Constraints::Simple::Library::Array 3pm "2018-03-31" "perl v5.26.1" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
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.SH "NAME"
Declare::Constraints::Simple::Library::Array \- Array Constraints
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 2
\&  # accept a list of pairs
\&  my $pairs_validation = IsArrayRef( HasArraySize(2,2) );
\&
\&  # integer => object pairs
\&  my $pairs = And( OnEvenElements(IsInt), 
\&                   OnOddElements(IsObject) );
\&
\&  # a three element array
\&  my $tri = And( HasArraySize(3,3),
\&                 OnArrayElements(0, IsInt,
\&                                 1, IsDefined,
\&                                 2, IsClass) );
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
This module contains all constraints that can be applied to array
references.
.SH "CONSTRAINTS"
.IX Header "CONSTRAINTS"
.SS "HasArraySize([$min, [$max]])"
.IX Subsection "HasArraySize([$min, [$max]])"
With \f(CW$min\fR defaulting to 1. So a specification of
.PP
.Vb 1
\&  my $profile = HasArraySize;
.Ve
.PP
checks for at least one value. To force an exact size of the array,
specify the same values for both:
.PP
.Vb 1
\&  my $profile = HasArraySize(3, 3);
.Ve
.ie n .SS "OnArrayElements($key => $constraint, $key => $constraint, ...)"
.el .SS "OnArrayElements($key => \f(CW$constraint\fP, \f(CW$key\fP => \f(CW$constraint\fP, ...)"
.IX Subsection "OnArrayElements($key => $constraint, $key => $constraint, ...)"
Applies the the \f(CW$constraint\fRs to the corresponding \f(CW$key\fRs if they are
present. For required keys see \f(CW\*(C`HasArraySize\*(C'\fR.
.SS "OnEvenElements($constraint)"
.IX Subsection "OnEvenElements($constraint)"
Runs the constraint on all even elements of an array. See also 
\&\f(CW\*(C`OnOddElements\*(C'\fR.
.SS "OnOddElements($constraint)"
.IX Subsection "OnOddElements($constraint)"
Runs the constraint on all odd elements of an array. See also
\&\f(CW\*(C`OnEvenElements\*(C'\fR.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
Declare::Constraints::Simple, Declare::Constraints::Simple::Library
.SH "AUTHOR"
.IX Header "AUTHOR"
Robert 'phaylon' Sedlacek \f(CW\*(C`<phaylon@dunkelheit.at>\*(C'\fR
.SH "LICENSE AND COPYRIGHT"
.IX Header "LICENSE AND COPYRIGHT"
This module is free software, you can redistribute it and/or modify it 
under the same terms as perl itself.