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.IX Title "PrintControl 3pm"
.TH PrintControl 3pm "2023-06-17" "perl v5.36.0" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
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.SH "NAME"
PDL::Perldl2::Plugin::PrintControl \- disable default print output
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 3
\&  pdl> $x = 3;
\&  3
\&  pdl> $_REPL\->load_plugin(\*(AqPDL::Perldl2::Plugin::PrintControl\*(Aq);
\&
\&  pdl> $x;
\&
\&  pdl> $_REPL\->print_by_default(1);
\&  1
\&  pdl> $x;
\&  3
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
By default the Devel::REPL always prints the results of its
evaluation.  This is fine for small objects but for things
like large data objects (e.g. a 100x100 matrix in \s-1PDL\s0) the
result can be hundreds of lines of output for each command.
.PP
This plugin disables the default print output and adds an
attribute with accessor method \f(CW\*(C`print_by_default\*(C'\fR which can be
used to toggle the print default on or off.
.SH "METHODS"
.IX Header "METHODS"
.SS "print_by_default"
.IX Subsection "print_by_default"
By default, the \f(CW\*(C`PrintControl\*(C'\fR plugin sets \f(CW\*(C`print_by_default\*(C'\fR to
0 (false), which disables automatic printing of results.
Call the print_by_default accessor with a 1 (true value) to enable
default printing.
.SS "do_print"
.IX Subsection "do_print"
This is a convenience accessor for the print_by_default attribute.
If you call this method without a value, it toggles the current
setting.  Otherwise, it just sets print_by_default to the value.
.PP
It is also available in the \f(CW\*(C`pdl2\*(C'\fR shell as the do_print sub
with the same operation but with an implicit use of \f(CW$_REPL\fR.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\f(CW\*(C`Devel::REPL\*(C'\fR
.SH "AUTHOR"
.IX Header "AUTHOR"
Chris Marshall, \f(CW\*(C`<chm at cpan dot org>\*(C'\fR
.SH "COPYRIGHT AND LICENSE"
.IX Header "COPYRIGHT AND LICENSE"
Copyright (C) 2010 by Christopher Marshall
.PP
This library is free software; you can redistribute it and/or modify
it under the same terms as Perl itself.