On Sat, 23 Nov 2002, Jonathan M. Hollin wrote: > Can anyone offer me some pointers (pun intended) on how to implement a > stack in Perl with an array? The description you give does not describe an 'academic' stack... You would probably need to read some good Perl books. I suggest the "classical" <Programming Perl - Ed. O'Reilly>
> > I need to have an array of elements as follows: > > 0 - e1 > 1 - e2 > 2 - e3 > ... @stack = (e1, e2, e3, ...) > > And I need to be able to insert items: > > e4 needs to go into $array[1]. 1 and 2 need to move down (or up or left > or right - depending on how you visualise arrays) yet retain their contents: > > 0 - e1 > 1 - e4 > 2 - e2 > 3 - e3 splice @stack, 1, 0, e4; > ... > > And, you guessed it, I need to be able to remove elements, and have the > others move down... > > remove e2, leaving: > > 0 - e1 > 1 - e4 > 3 - e3 > ... splice @stack, 2, 1; Franck. ==================================================== ESSENTIAL SOFTWARE - Ingénierie Informatique Solutions Linux & Open Source en Polynésie française ---------------------------------------------------- http://www.esoft.pf/ Tél: (689) 562 395 / 541 295 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+- "Fiabilisez vos systèmes informatiques. Osez Linux, le choix moderne des gouvernements et des entreprises Fortune 500" ====================================================
