Arrays vs Lists

[Mike McManus]

Thanks to both Dar and David for your inputs. Gives me something to 
think about in deciding to use the one or the other. Has allowed me to 
get a better handle on it. I was starting to understand and use arrays 
a lot more when I was doing more perl. But it is so easy to through a 
list together in Rev., that sometime I wonder if it's worth the effort 
to create an array, especially since I seem to have a lot of trouble 
creating and using them in Rev(Custom Properties to be specific!). But 
apparently I should give it some thought under the right conditions

As for Dar's question about a list. IME, a list is an ordered delimited 
groups of words or phrases. The delimiter is usually, but not always a 
comma. I suspect that is not correct when you consider programming in 
general. But having spent a lot of time in Hypercard. That is what I 
consider one.  You can delimit with anything, just be sure it doesn't 
pop up in you list items.


On Wednesday, December 4, 2002, at 04:08  PM, David Vaughan wrote:

>
> On Thursday, December 5, 2002, at 12:32 AM, Mike McManus wrote:
>
>> I have seen a lot about arrays lately here. So I am wondering.
>>
>> It seems very simple to address item 2 of line 4 or some such. Or to 
>> just repeat "for each line". Not sure what the effective result is of 
>> either creating it as an array or splitting it into an array.
>
> As an afterthought triggered by this question and the responses from 
> Dar and me, every couple of months this list receives a query along 
> the lines of "my repeat with i = 1 to n loop is very slow" to which 
> several will chorus "use repeat for each" (as Mike mentions).
>
> So it may be worthwhile mentioning the otherwise obvious inference 
> from the array discussion that one way to deal with a large list where 
> you want access by line number is first to use RFE to put it into an 
> array with enumerated keys, and Bob's your uncle. Slower than RFE for 
> a single cycle but fast for repeated direct access to lines not 
> otherwise keyed; e.g. indexing into a lookup list via a calculated 
> sequence number.
>
> cheers
> David
>
>>
>>
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