On 8/5/2019 11:53 AM, Paul Dupuis via use-livecode wrote:
Today is not my coding day. I have a problem I should be able to design a solution for an am struggling. Clearly I am missing "something"

I have 2 lists (LISTNEW and LISTOLD) of the following format:

ParentA
<space>Child 1
<space>Child 2
<space>etc.
ParentB
<space>Child 1
<space>etc.
etc.

The parents are in alphabetical sorted order, the children may not be in sorted order

I need to hunt through LISTOLD comparing the LISTOLD Parents to the LISTNEW Parents   FOR any LISTOLD Parent present in LISTNEW, check the Children of the matching Parents and add any Child for the LISTOLD Parent that is not already under its matching LISTNEW Parent   FOR any LISTOLD Parent NOT in LISTNEW, I can ignore the Parent and its Children

I can not seem to write an approach to solve this today. Does any body have some code so solve this they may be willing to share?


Thank you everyone who responded. Apparently, I really just needed a nudge, which Craig's first response provided. All replies helped though. Routine is now coded, tested, and working correctly.

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