Enumerations, annotations and map keys!

bartyborris

Took me a bit to figure out how to link a user choice to a map key.  Enumerations can be tricky at first (at least for me, even with the documentation).  It's important to use "as string" to drop the prior type tag defined by the enumeration.

annotation { "Feature Type Name" : "My Feature" }<br>export const myFeature = defineFeature(function(context is Context, id is Id, definition is map)<br>&nbsp;&nbsp;&nbsp; precondition<br>&nbsp;&nbsp;&nbsp; {<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; annotation { "Name" : "Tooth Type" }<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; definition.ToothType is ToothType;<br>&nbsp;&nbsp;&nbsp; }<br>&nbsp;&nbsp;&nbsp; {<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; var choice = definition.ToothType;<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; println("definition.ToothType is: "~ definition.ToothType);<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; println("Is definition.ToothType a string? " ~ definition.ToothType is string );<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; println('Is definition.ToothType == "T5"? ' ~ definition.ToothType == "T5");<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; println('Is (definition.ToothType as string) equal to "T5": ' ~ (definition.ToothType as string) == "T5");<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; choice = definition.ToothType as string;<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; var toothPitch = {"T5" : 5 * millimeter, "T10": 10 * millimeter};<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; println("The tooth pitch is: " ~ toothPitch[choice] / millimeter ~ "mm");<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <br>&nbsp;&nbsp;&nbsp; });<br>&nbsp;&nbsp;&nbsp; <br>export enum ToothType<br>{<br>&nbsp;&nbsp;&nbsp; annotation {"Name" : "T5"}<br>&nbsp;&nbsp;&nbsp; T5,<br>&nbsp;&nbsp;&nbsp; annotation {"Name" : "T10"}<br>&nbsp;&nbsp;&nbsp; T10<br>}

Results:
definition.ToothType is: T5
Is definition.ToothType a string? true
Is definition.ToothType == "T5"? false
Is (definition.ToothType as string) equal to "T5": true
The tooth pitch is: 5mm

kevin_o_toole_1

FeatureScript map keys don't have to be strings. For your case, rather than converting everything to normal strings, it's preferable to use enum values (ToothTypes) everywhere.

To get that value without any conversions, you can do:

));</code>var toothPitch is ValueWithUnits = {
    ToothType.T5  : 5 * millimeter,
    ToothType.T10 : 10 * millimeter
}[definition.ToothType];

<pre><code>println("The tooth pitch is: " ~ toString(<span>toothPitch</span>

bartyborris

Much cleaner.  Thank you Kevin.

Alex_Pitt

I'm new to maps. Can the keys in a map be edges? And can the corresponding value in the map be a Solid Body? I know that Arrays can contain Solid Bodies.  I want to create a record (whether it's a map or an array)  that links an edge to a body. So Edge1 belongs to SolidBody1, Edge2 belongs to SolidBody2, Edge3, belongs to SolidBody3 etc. 

Konst_Sh

@Alex_Pitt There is a query constructor that creates the subset of entities owned by specified body query: https://cad.onshape.com/FsDoc/library.html#qOwnedByBody-Query-Query

So edgesOwnedByBody1 = qOwnedByBody(allEdges, queryOfBody1);