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Full Discussion: Compiler/Runtime uses of sizeof
Top Forums Programming Compiler/Runtime uses of sizeof Post 302964719 by GSalisbury on Monday 18th of January 2016 12:32:45 PM
Old 01-18-2016
FWIW,
The original query was not overtly based upon concerns of overhead or performance per se but, rather, [possible?] quote technical differences in compiled result.

The illustrated fragments using sizeof as arguments were in place in an area that was already selective in execution and time and volume did not come into play.

A discussion had started on the merits of an argument vs. a variable and the posting here was more for enlarging the set of opinions. I, too, will often include additional steps etc. in order to make a sequence more clear or to be able to include some step-wise commentary.

The upshot was we (I) left the use of the sizeof as arguments in place as is principally because we (I<g>) didn't have to do anything (Management 101 - 1st precept - do nothing) and because the use was in a block that already well commented leaving no ambiguity.

Thanks.
Geo. Salisbury
Long Valley, NJ
 

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LEARN ABOUT DEBIAN

geo::space

Geo::Space(3pm) 					User Contributed Perl Documentation					   Geo::Space(3pm)

NAME

       Geo::Space - A collection of various  items

INHERITANCE

	Geo::Space
	  is a Geo::Shape

SYNOPSIS

	my $island1 = Geo::Line->filled(...);
	my $island2 = Geo::Space->new(...);
	my $islands = Geo::Space->new($island1, $island2)

DESCRIPTION

       Where a Geo::Surface can only contains sets of nested polygons, the Space can contain anything you like: lines, points, and unrelated
       polygons.

METHODS

   Constructors
       $obj->new([COMPONENTS], [OPTIONS])

       Geo::Space->new([COMPONENTS], [OPTIONS])

	   When called as instance method, some defaults are copied from the object where the call is made upon.  Usually called as class method.

	   COMPONENTS are Math::Polygon, Math::Polygon::Surface, Geo::Point, Geo::Line, Geo::Surface, Geo::Space objects.

	    Option--Defined in--Default
	    proj    Geo::Shape	see Geo::Proj::defaultProjection()

	   . proj => LABEL

   Attributes
       $obj->component(INDEX, [INDEX, ...])

	   Returns the component (or components) with the specified INDEX(es). One Geo::Shape object in scalar context, and multiple in list
	   context.

       $obj->components

	   Returns a list of Geo::Shape objects, all located in this space.

       $obj->lines

	   Returns a list of Geo::Line objects, which are defined as separate components.

       $obj->nrComponents

	   Returns the number of components.

       $obj->onlyLines

	   Returns true when all components are lines; Geo::Line objects.

       $obj->onlyPoints

	   Returns true when all components are points; Geo::Point objects.

       $obj->onlyRings

	   Returns true when all components are closed lines; Geo::Line objects each defined as ring.

       $obj->points

	   Returns a list of Geo::Point objects, which are defined as separate components.

       $obj->proj

	   See "Attributes" in Geo::Shape

       $obj->proj4

	   See "Attributes" in Geo::Shape

   Projections
       $obj->in(LABEL|'utm')

	   See "Projections" in Geo::Shape

       $obj->projectOn(NICK, POINTS)

	   See "Projections" in Geo::Shape

   Geometry
       $obj->area

	   Returns the area enclosed by the combined components.  Only useful when the points are in some orthogonal projection.

       $obj->bbox

	   See "Geometry" in Geo::Shape

       $obj->bboxCenter

	   See "Geometry" in Geo::Shape

       $obj->bboxRing([XMIN, YMIN, XMAX, YMAX, [PROJ]])

       Geo::Space->bboxRing([XMIN, YMIN, XMAX, YMAX, [PROJ]])

	   See "Geometry" in Geo::Shape

       $obj->distance(OBJECT, [UNIT])

	   See "Geometry" in Geo::Shape

       $obj->perimeter

	   The length of the outer polygons of all components. Only useful in a orthogonal coordinate systems.

   Display
       $obj->deg2dm(DEGREES, POS, NEG)

       Geo::Space->deg2dm(DEGREES, POS, NEG)

	   See "Display" in Geo::Shape

       $obj->deg2dms(DEGREES, POS, NEG)

       Geo::Space->deg2dms(DEGREES, POS, NEG)

	   See "Display" in Geo::Shape

       $obj->dms2deg(DMS)

       Geo::Space->dms2deg(DMS)

	   See "Display" in Geo::Shape

       $obj->toString([PROJECTION])

	   Returns a string representation of the line, which is also used for stringification.

	   example:

DIAGNOSTICS

       Error: distance calculation not implemented between a $kind and a $kind

	   Only a subset of all objects can be used in the distance calculation.  The limitation is purely caused by lack of time to implement
	   this.

       Error: in() not implemented for a $class

SEE ALSO

       This module is part of Geo-Point distribution version 0.93, built on May 19, 2010. Website: http://perl.overmeer.net/geo/ All modules in
       this suite: "Geo::Point", "Geo::Proj4", "Geo::WKT", "Math::Polygon", "Geo::GML", "Geo::ISO19139", "Geo::EOP", "Geo::Format::Envisat", and
       "Geo::Format::Landsat".

       Please post questions or ideas to the mailinglist at http://geo-perl@list.hut.fi

LICENSE

       Copyrights 2005-2010 by Mark Overmeer. For other contributors see ChangeLog.

       This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.  See
       http://www.perl.com/perl/misc/Artistic.html

perl v5.14.2							    2010-05-19							   Geo::Space(3pm)
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