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Re: Re: newbie question on functions


You probably meant to use Append in your example of unexpected 
behaviour, since AppendTo works as one might hope.

junk={1,2,3};
Append[junk,4]
{1,2,3,4}
junk
{1,2,3}

But AppendTo actually does what its name suggests:

junk={1,2,3};
AppendTo[junk,4]
{1,2,3,4}
junk
{1,2,3,4}

christopherpurcell at mac.com
AIM/iChatAV:   cffrc



On Nov 2, 2004, at 3:05 AM, AES/newspost wrote:

> In article <cm4r7j$6lm$1 at smc.vnet.net>,
>  David Bailey <dave at Remove_Thisdbailey.co.uk> wrote:
>
>> Yes, of course you can save the result of a calculation. For example:
>>
>> result=intensity[4.,5.]
>
>
> For the original "newbie" poster:
>
> For newbies, or less expert users like me, it's easy to think that
> something like
>
>     AppendTo[list, expr]
>
> is a "command" that will do what it says: append expr to list.  Takes a
> few bad experiences to realize that you actually have to say
>
>     list = AppendTo[list,expr]
>
> Same general principle applies more broadly.
>


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