Multiplying Maps

[Geoffrey Tian]

Hello,

I am trying to work through a scenario, where an entity can order "sets" of items, but I cannot figure out how to multiply the demand by the sets ordered. I am working with the following example as attached, but I have written an explanation below:

Entity "Order" with the following properties:

* Set (String)

* Sets Ordered (Number)

* Demand (ArrayList)

Stored on the Assign object we have the following attributes:

{ SetBOMs  '{"SetA"={"Steel"=5,"Copper"=10},"SetB"={"Steel"=10,"Bronze"=20}}' }
{ AllSets  '{"SetA", "SetB"}' }

The assign block that the Order Entity passes through assigns in the order:
Set (1 - "SetA" | 2 - "SetB")

SetsOrdered (random number 1-5)

Demand (this.SetBOMs(this.obj.Set))

However, I cannot figure out any way to multiply each entry in Demand by SetsOrdered - any method using a lambda function only returns a map, and not an ArrayList. 

My question is if it is even possible to implement this behavior with ArrayLists- if not the other option would be to store demands as a 2D matrix, or two separate properties (like DemandQty and DemandPart). 

Any insight is appreciated.

[Ben Randall]

Hi Geoffrey

Question: have you tried the map function (page 75 of the user guide under higher order function)?

map(|x|(x*this.SetsOrdered), 

this.SetBOMs(this.obj.Set))

Seems like it would work, though I’m just on my phone and not able to try it. I don’t usually use keys in my arrays so I’m not sure if that has some effect.

Regards,

BR

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[Geoffrey Tian]

Hello Ben,

Thank you for your response.

The issue with the map function is that it only returns an array, and not an ArrayList, so we lose the keyed structure.