personName[3258] = "Billy Bob"
birthyear[3258] = 1982
Intersecting the values you get from retrieving each array/key combo gives
you the identifiers for all the people who match all your selection
criteria, as many as you care to specify.
I've just about got it. You gave me a good jumping board, Dick.
Here's where it sits. Using one single array (this allows for the
best ease of use), data is stored as follows:
census[1111,team] = Red Sox
census[2222,team] = Red Sox
census[3333,team] = White Sox
census[1111,city] = Chicago
census[2222,city] = Atlanta
census[3333,city] = Chicago
Now, to get a list of folks that live in Atlanta that are Red Sox
fans, I did the following:
put census into a
combine a with return and comma
filter a with "*,team,Red Sox"
put census into b
combine b with return and comma
filter b with "*,city,Atlanta"
This gives me:
a =
1111,team,Red Sox
2222,team,Red Sox
b =
2222,city,Atlanta
Can a and b be intersected as is? (My attempts failed.) The
following works beautifully, but is it the most efficient? Is using
split/combine/filter to manipulate a giant array faster than a repeat
loop thru a gigantic list?
split a by return and comma
split b by return and comma
intersect a with b
combine a with return and comma
answer a
a =
2222,team,Red Sox
That gave me exactly what I need. A list of anyone with team(Red
Sox) and city(Atlanta) with item 1 of each line as the unique
identifier.
Any efficiency suggestions are welcome :-)
Shari
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