Growable Select Function

[jimchretz]

Can we have a select from multiple sources?

An expandable function with a selector, which returns the type default value if select is -1 or more than items number.

I guess NI guys can implement something more efficient than a build arrary/index.

[admin edit: renaming idea to 'Growable Select Function' to better reflect the nature of the idea. Previous name was 'Multiple Select'.]

[X.]

Let me rephrase your suggestion.

Your diagram illustrates a shortcut for this:

Seriously?

[AristosQueue (NI)]

Jimchertz: A reasonable idea. I can see its utility. However, if you're coding this today, use a case structure, not a build-array-then-index-array. You'll have better performance and lower memory usage.

Low priority... not something I'd strongly push for personally as the case structure works well for me, but I see the appeal. I'll put my kudos on the idea.

X: It's just a growable Select node. Such larege selector nodes are useful enough as "switch" statements in text languages. I suspect FPGA could make a fair amount of use out of such a node... avoids the heavier syntax of the case structure.

I used the compound arith node to model the idea.

JIM: One big question... how do you want to handle out of range errors? Just the same as index array (take the nearest index)? Or do you want error terminals? That's one advantage of the existing case structure syntax -- you get to decide these things on a case-by-case (no pun intended) basis.

[crossrulz]

Duplicate: Growable Multiplexor or multi Cases selection

[AristosQueue (NI)]

Ah. Thanks, crossrulz. I thought it was out there somewhere.

[X.]

I kudoed that other suggestion 3 years ago, but I am having doubts now... Probably because I have gotten used to drop a case structure each time I have more than a couple of alternatives.

[Darren]

Duplicate of http://forums.ni.com/t5/LabVIEW-Idea-Exchange/Growable-Multiplexor-or-multi-Cases-selection/idi-p/10...

[jimchretz]

@AristosQueue to answer your question, as I said in the initial post, out of range value when you index an array is the default typedef value, 0 for numerics, empty string, False for boolean...

I guess I can explore the xnode world by making this expandable function, I thought someone already made it and could give a link 😉

[AristosQueue (NI)]

jim: I asked to make sure you'd thought about the other option and consciously rejected it.

The link is in the duplicate idea.

[jimchretz]

Well Ouadji made the Xnode, awesome!

https://lavag.org/topic/16842-my-xnode-select-n-inputs/