Hi All I am teaching myself some design patterns currently I am trying to build a simple Rule Engine. I ran upon an issue where I would like to call many functions ( rule set) while passing them the same parameters. In C# I could just define an IRule interface, then List methods subscribing to the…

If you use functions, still make it a Tuple of functions, and use recursion. Unless you don’t care about performance. Here’s a toy example. function applyfuncs(obj, funcs::Tuple) = newobj = funcs[1](obj) applyfuncs(newobj, Base.tail(funcs)) end applyfuncs(obj, funcs::Tuple{}) = obj obj =…

[image] Dustin_Hess: You could imagine this in the context of game, lets say where you want modify a players health based on various interactions with other player, world, enemys etc… This seems like functionality that can be handled better by automata or behavior trees , rule engines usually …

Thanks for the reply. I was busy at work so I am just now revisiting. I will check out the packages you mentioned and report back.

Thanks for the reply things were simple enough I implemented a barrier function pattern to construct the Tuple of rules that I can call from a Dict that store references to each function type. This barrier function with then passes this Tuple to correct function to loop over. Works well is quite opt…

You’re essentially describing how DynamicGrids.jl works, given that you want to write a list of rules that are applied to some object in sequence. DynamicGrids.jl applies each rule to every cell in an array, one rule after the other. But the principle is general. From my experience writing it, you …

@Raf Thanks I will take a look at DynamicGrids.jl. Would you mind posting a toy example? That said yes the rules were very specific and short by design. My application is pretty small so I think mostly it doesn’t matter for my use case. However, I may go rewrite in more general as you describe abov…

@Raf Very nice! Thanks! your example is nice and clear. I will rewrite in this manor as you describe. I will post back and let you know how it goes. I am still learning quite a bit on designing things. Cheers have a nice weekend.

No problem! I just added an example above with objects as well. I recommend objects :slight_smile:

Simple Rule Engine

General Usage

mschauer April 30, 2021, 5:19am 7

Might that you can use FunctionWranglers as in Event handler - #5 by tkf

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Simple Rule Engine

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