List Commands Library for 50g

[John Keith]

(08-23-2017 02:58 AM)DavidM Wrote:  So may I assume that you would be in support of specialized commands in the ListExt library to delete multiple instances of indexed elements?

To all, some considerations to ponder...

This would seem like a good candidate for a command with an overloaded argument scenario. The first would be:

2: { list of objects }
1: number (index of element to delete)

A second option:
2: { list of objects }
1: { list of indices to delete }

Those sound good to me!

(08-23-2017 02:58 AM)DavidM Wrote:  Other considerations:

What is the appropriate result for the following scenarios?

• Index list is empty
• Index list contains a 0
• Index list contains non-numeric elements
• Index list contains negative/fractional numbers
• Index list contains numbers greater than the number of elements in SL2 list
  

What would be an appropriate name for such a command?

Then there's mostly the same considerations for a command that would remove a list of matching elements (as opposed to indexed).

If the index list is empty, the command should return the original list unaltered. For the other scenarios, I would prefer that it exit with a "Bad Argument Value" error, since this would be consistent with built-in RPL commands that deal with lists.

I can see the advantage of having the command be able to "massage" non-integer or out-of-range values but I believe that consistency across commands is more important.

As to the name I would suggest REMOV or LRMOV but I'm sure there will be other good ideas.

John