Intersecting data question/challenge

Jon jbondy at sover.net
Fri Jul 8 22:41:50 EDT 2005


Whoops!  Sorry!

:)


Dennis Brown wrote:

> Jon,
>
> Unless I am not understanding your suggestion, that is the method  
> used to start off this thread.
>
> Dennis
>
> On Jul 8, 2005, at 6:49 PM, Jon wrote:
>
>> How about loading a string with the numbers from one list,  
>> represented as strings (1 ==> "001", etc) appended and separated by  
>> spaces or commas.
>>
>> Then run through the second number list searching for each number  in 
>> the above string?
>>
>> Hugely clunky, due to Rev's sloth, but it might be faster.
>>
>> I *@(*%# hate it when one has to jump through these kinds of hoops  
>> to make something work fast enough.  I have better things to do  with 
>> my time.  Sigh.
>>
>> :)
>>
>> Jon
>>
>>
>> Chris Sheffield wrote:
>>
>>
>>> Could you make use of the split command somehow?  You would have  
>>> to  format your lists a little differently, but if you did it  right 
>>> and  specified a primary and secondary delimiter, you might  be able 
>>> to get  quick results and still take advantage of the  intersect 
>>> command.   Anyway, just another idea.
>>>
>>> Chris Sheffield
>>>
>>>
>>> On Jul 8, 2005, at 12:50 PM, Dennis Brown wrote:
>>>
>>>
>>>> Eric,
>>>>
>>>> Yes, I looked at the intersect command, but it performs the  
>>>> action  on the keys not the data from a list.  I would have to  
>>>> create an  array element for each integer in the list with the  
>>>> integer as the  key.  Sounded like two loops that would run even  
>>>> slower than my  example:
>>>>
>>>> repeat for each item theItem in list1
>>>>   put empty into myArray1[theItem]
>>>> end repeat
>>>> repeat for each item theItem in list2
>>>>   put empty into myArray2[theItem]
>>>> end repeat
>>>> intersect myArray1 with myArray2
>>>> if the keys of myArray1 is empty then get false else get true
>>>>
>>>> In actual practice, the above example runs 3 times slower than  
>>>> the  below example for the sample data shown.
>>>>
>>>> However, knowing that Rev had such a command for the keys, I   
>>>> thought perhaps someone knew of a more clever way to use it, or   
>>>> maybe there was another way to intersect data.
>>>>
>>>> Dennis
>>>>
>>>
>>>
>>> ------------------------------------------
>>> Chris Sheffield
>>> Read Naturally
>>> The Fluency Company
>>> http://www.readnaturally.com
>>> ------------------------------------------
>>>
>>>
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>>>
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