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New List Based On Portion Of List

Here is a fairly useful method of using formula language to pick out values
from a list of multiple values based on matching a "portion" of each element
without using a view.

Say you original list "List1" contains the following:

List1 := "Apples|Fruit|$1.25" : "Oranges|Fruit|$1.10" : "Peas|Vegatable|$0.55"
: "Bannanas|Fruit|$1.50" : "Tomatos|Debatable|$0.95"

You want to create a new list of only those elements that are fruit.
List1 := "Apples|Fruit|$1.25" : "Oranges|Fruit|$1.10" : "Peas|Vegatable|$0.55"
: "Bannanas|Fruit|$1.50" : "Tomatos|Debatable|$0.95"

List2 := @Word(List1;"|";2);
List3 := @Replace(List2; "Fruit"; "");
List4 := List1 + List3;
List5 := @Replace( List1; List4; "");
List6 := @Trim(@Replace(List1; List5; ""));

Now "List6" contains the final list and can be used like this:

@Word(List6;"|";1) + " - " + @Word(List6;"|";3)

giving you a fruit list like this -

Apples - $1.25
Oranges - $1.10
Bannana - $1.50

Optional Description of each step:
List1 - Original List
List2 - List of the second "words" in each element (Fruit, Fruit, Vagetable,
Fruit, Debatable)
List3 - List of seconnd words in element with one we want to keep Null
List4 - Original List with "word 2" appended to change the elements we don't
List5 - Replaces the words that didn't change with Null to make a mask of what
to remove
List6 - (Final List) Use the mask to Null what we don't want and trim results
to remove Nulls from list.
This was last published in November 2000

Dig Deeper on Domino Resources - Part 6

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