Extracting values from arbitrary MathLink.WExpr about mathlink.jl HOT 8 CLOSED

Wow, this is fantastic. Yes, having this function can be super useful and can also serve as a template for other purposes.Thanks!Gani-Sent from my iPhoneOn Nov 14, 2023, at 1:39 AM, Mikael Fremling ***@***.***> wrote: Hi, the behavior you are describing is not the same as the matiamatica behaviour so it would be unwise to implement it. In[1]:= chingAssociation=Association["team"->"HOU","lastName"->"Ching","firstName"->"Brian","position"->"F","baseSalary"->Quantity[220000,"USDollars"],"guaranteedSalary"->Quantity[220000,"USDollars"]] Out[1]= <|team->HOU,lastName->Ching,firstName->Brian,position->F,baseSalary->$ 220000,guaranteedSalary->$ 220000|> In[2]:= c=chingAssociation[[{"baseSalary","position"}]] Out[2]= <|baseSalary->$ 220000,position->F|> you can howerver acces individual elements directly: In[3]:= c["baseSalary"] Out[3]= $ 220000 In[4]:= {c["baseSalary"], c["position"]} Out[4]= {Quantity[220000, "USDollars"], "F"} In Julia and MathLink this could be done by mapping the Association to a Julia dictionary function WAssociationToDict(Asso::MathLink.WExpr) Wprint(Asso) if Asso.head != W"Association" error("Not an association") end D=Dict() for Rule in Asso.args if Rule.head != W"Rule" error("not a rule") end if length(Rule.args) != 2 error("Bad rule") end D[Rule.args[1]]=Rule.args[2] end return D end Running the code could the look something like this: julia> Ass = weval(W`Association["team" -> "HOU", "lastName" -> "Ching", "firstName" -> "Brian", "position" -> "F", "baseSalary" -> Quantity[220000, "USDollars"], "guaranteedSalary" -> Quantity[220000, "USDollars"], "year" -> DateObject[{2007}, "Year", "Gregorian", -5.]]`) W"Association"(W"Rule"("team", "HOU"), W"Rule"("lastName", "Ching"), W"Rule"("firstName", "Brian"), W"Rule"("position", "F"), W"Rule"("baseSalary", W"Quantity"(220000, "USDollars")), W"Rule"("guaranteedSalary", W"Quantity"(220000, "USDollars")), W"Rule"("year", W"DateObject"(W"List"(2007), "Year", "Gregorian", -5.0))) julia> D = WAssociationToDict(Ass) Dict{Any, Any} with 7 entries: "baseSalary" => W"Quantity"(220000, "USDollars") "guaranteedSalary" => W"Quantity"(220000, "USDollars") "year" => W"DateObject"(W"List"(2007), "Year", "Gregorian", -5.0) "team" => "HOU" "lastName" => "Ching" "firstName" => "Brian" "position" => "F" julia> D["year"] W"DateObject"(W"List"(2007), "Year", "Gregorian", -5.0) julia> D["team"] "HOU" julia> [D[x] for x in ["year","team"]] 2-element Vector{Any}: W"DateObject"(W"List"(2007), "Year", "Gregorian", -5.0) "HOU" @gganapat: Would a function like WAssociationToDict be usefull? —Reply to this email directly, view it on GitHub, or unsubscribe.You are receiving this because you were mentioned.Message ID: ***@***.***>