On Wed, 2007-10-10 at 14:44 +0100, Tony Marston wrote: > ""Nathan Nobbe"" <quickshiftin@xxxxxxxxx> wrote in message > news:7dd2dc0b0710091950i62159761le400b3839677bebd@xxxxxxxxxxxxxxxxx > > On 10/9/07, Robert Cummings <robert@xxxxxxxxxxxxx> wrote: > >> > >> On Tue, 2007-10-09 at 21:37 -0400, Nathan Nobbe wrote: > >> > > >> > does a lawn mower not have blades; and gas and a control panel; does it > >> not > >> > have > >> > wheels? my object modeling of a lawn mower would certainly have these > >> > things; > >> > and most likely i would mark components of the engine as private. > >> > and what does a lawn mower cut anyway; grass; i thought that was it. > >> > so > >> if > >> > there > >> > was no grass could there still be an algorithm to cut it? > >> > i say grass is part of the grass-cutting algorithm. > >> > >> Well it helps to refine the algorithm, but let's say we use fingers > >> instead as our measure... I'm sure we would find that we could cut grass > >> also >:) > > > > > > good point. > > the lawn mower is still consistent of its own parts and they > > comprise its implementation. > > > > -nathan > > Yes, but a lawnmower does not contain grass, it is used to cut grass. Whole > grass goes in and cut grass comes out. The lawnmower does not have any grass > in its construction, therefore grass is not part of the implementation. It may not be part of it's construction, but it certainly is a member variable. It's along the lines of the following: <?php class Lawnmower { var $works = true; var $grassyMulchCrapStuckToUndersideOfLawnmower = 0; function mow( $what ) { if( !$this->works ) { return false; } if( $what == 'grass' ) { $this->grassyMulchCrapStuckToUndersideOfLawnmower += rand( 1, 100 ); if( $this->grassyMulchCrapStuckToUndersideOfLawnmower > 1000 ) { return $this->seize(); } } else if( $what == 'fingers' ) { // >:) } return true; } function seize() { return ($this->works = false); } } ?> Cheers, Rob. -- ........................................................... SwarmBuy.com - http://www.swarmbuy.com Leveraging the buying power of the masses! ........................................................... -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
