I was able to get here:
#light
type review(critic : string, movie : string, rating : int) =
member p.Critic = critic
member p.Movie = movie
member p.Rating = rating
let Reviews = [ new review("CriticA", "MovieA", 40);
new review("CriticA", "MoviewB", 15);
new review("CriticB", "MoviewA", 9);
new review("CriticB", "MovieB", 20); ]
let result =
Reviews
|> Seq.groupBy (fun x -> x.Critic)
|> Seq.map (function a,b -> (a, [for i in b -> i.Movie,i.Rating]))
But need it to be in Map(string,Map(string,float)).
Any ideas?
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Hello, I have been trying to recreate a structure in the following format:
let critics =
Map.ofList [("Lisa Rose",
Map.ofList [("Lady in the Water", 2.5);("Snakes on a Plane", 3.5);
("Just My Luck", 3.0);("Superman Returns", 3.5);
("You, Me and Dupree", 2.5);("The Night Listener", 3.0)];);
used in Collective Intelligence samples from an array in the following format:
let myData =
[
"CriticA","Movie_A",1
; "CriticA","Movie_B",2
; "CriticB","Movie_B",5
; "CriticB","Movie_C",2
]
I have just started learning F#.
Thank you.