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Re: Push value onto an array? [message #33680]

Sat, 18 January 2003 18:12

Ed Wright
Messages: 39
Registered: February 1999

Member

in article b07o36$24do$1@nntp6.u.washington.edu, Rick Towler at
rtowler@u.washington.edu wrote on 1/16/03 5:56 PM:

>
> "Ed Wright" wrote >
>> Question,
>>
>> How can I push a value onto an array?
>>
>> Given some array A of size m, how to add an entry at A[m]?
>>
>> Something like
>>
>> push @A, $value;
>>
>> This needs to be done in a loop. Yes, really.
>
> I think this was covered in depth a month or two ago. I just googled one
> entitled "How to use pointers instead of arrays" which covers some of the
> details (it quickly diverges from pointers and addresses your question
> directly).

Thanks,

I used Dr. Fanning's solution.

> In practice, this means that you have some kind of
> counter to tell you where you are in your array. If the
> counter gets above the "chunk" size, you allocate more
> memory to the array:
>
> array[counter] = value
> counter = counter + 1
> IF counter MOD 100 EQ 0 THEN array = [Temporary(array), Findgen(100)]
>
> When you finish adding things to your array, you trim
> it to the correct size:
>
> array = array[0:counter-1]
>
> This is both efficient and fast.

As always,
Ed Wright

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[Message index]

		Re: Push value onto an array? By: Ed Wright on Sat, 18 January 2003 18:12
		Re: Push value onto an array? By: Craig Markwardt on Thu, 16 January 2003 20:10
		Re: Push value onto an array? By: Rick Towler on Thu, 16 January 2003 17:56

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