OpenEuphoria

Re: Updating parameters in a procedure / function

• Posted by ZNorQ <znorq at holhaug.com> Jul 14, 2006
• 563 views

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