OpenEuphoria

Re: Updating parameters in a procedure / function

• Posted by don cole <doncole at pacbell.net> Jul 15, 2006
• 715 views

ZNorQ wrote:
> 
> don cole wrote:
> > 
> > ZNorQ wrote:
> > > 
> > > I want to create a function that adds an element to a sequence, and
> > > returns
> > > the index in the sequence. I want it to be flexible, so that it can
> > > update any sequence - but how do I do that?
> > > 
> > > For example;
> > > 
> > > }}}
<eucode>
> > > atom     idx             idx = 0
> > > sequence myCars          myCars = {}
> > > sequence myPhones        myPhones = {}
> > > sequence myGirlFriends   myGirlFriends = {}
> > > 
> > > function addElement(sequence Element, sequence mySequence)
> > >   mySequence = append(mySequence, Element)
> > >   return length(mySequence)
> > > end function
> > > 
> > > idx = addElement("Audi", myCars)
> > > idx = addElement("99 99 99 99", myPhones)
> > > idx = addElement("Trine", myGirlFriends)
> > > </eucode>
{{{

> > > 
> > > Regards,
> > > Kenneth / ZNorQ
> > 
> > Hello ZNorQ,
> > 
> > It seems to me you would want:
> > 
> > }}}
<eucode>
> >  atom     idx             idx = 0
> >  sequence myCars          myCars = {}
> >  sequence myPhones        myPhones = {}
> >  equence myGirlFriends   myGirlFriends = {}
> > 
> > function addElement(sequence Element, sequence mySequence)
> >   mySequence = append(mySequence, Element)
> >   return mySequence
> > end function
> > 
> >  myCars=addElement("Audi",myCars)
> >  idx=length(myCars)
> > 
> >  myPhones = addElement("99 99 99 99", myPhones)
> >  idx=length(myPhones)
> > 
> >  myGirlFriends = addElement("Trine", myGirlFriends)
> >  idx=length(myGirlFriends)
> > 
> > ----------------also you could-------------------
> > function addElement(sequence Element, sequence mySequence)
> >   mySequence = append(mySequence, Element)
> >   return {mySequence }& {length(mySequence})
> > end function
> > 
> >   junk=addElement("Audi",myCars)
> >   myCars=junk[1]
> >   idx=junk[2]
> > 
> >   junk=addElement("99 99 99 ",myPhones)
> >   myPhones=junk[1]
> >   idx=junk[2]
> > 
> >   junk=addElement("Trine", GirlFriends)
> >   myGirlFriends=junk[1]
> >   idx=junk[2]
> > 
> > > </eucode>
{{{

> > 
> > 
> > Don Cole
> 
> Hey Don,
> 
> Yeah, I thought of both those examples, but I was kinda hoping I could do
> it in one go only, like in my example... :) I remember back in the pascal
> days, you could use a "var" statement (I think) in the procedure/function
> declaration, and that would tell it that it should manipulate the global
> variable, instead of using a copy of the global. I guess we call them
> pointers.. :)
> 
> Regards,
> Kenneth


Hello ZNorQ ,

As for pointers how about:

I'll just do one database in my example.

function addElement(sequence Element, sequence mySequence)
  integer pointer_one,pointer_two
    pointer_one=length(mySequence)+1
      mySequence = append(mySequence, Element)
    pointer_two=length(mySequence)
 return {pointer_one,pointer_two)
end function

anns_idx=addElement(myGirlFriends,"Ann")

 Just a thought.
Don Cole