langref.org - ruby, cpp, fsharp, and clojure - Maps | Declaration

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Maps

Declaration

Define an initial map

Define the map {circle:1, triangle:3, square:4}

ruby

shapes = {'circle'=>1, 'triangle'=>3, 'square'=>4}

ruby

shapes = Hash['circle', 1, 'triangle', 3, 'square', 4]

ruby

shapes = { :circle => 1, :triangle => 3, :square => 4 }

cpp C++/CLI .NET 2.0

Hashtable^ shapes = gcnew Hashtable;

shapes->Add("circle", 1);
shapes->Add("triangle", 3);
shapes->Add("square", 4);

cpp C++/CLI .NET 2.0

Generic::Dictionary<String^, int>^ shapes = gcnew Generic::Dictionary<String^, int>();

shapes->Add("circle", 1);
shapes->Add("triangle", 3);
shapes->Add("square", 4);

cpp

map<string, int> shapes;

shapes["circle"] = 1;
shapes["triangle"] = 3;
shapes["square"] = 4;

fsharp

let shapes = Map.ofList [("circle", 1); ("triangle", 3); ("square", 4)]

fsharp

let shapes = Map.empty.Add("circle", 1).Add("triangle", 3).Add("square", 4)

fsharp

let shapes = new Generic.Dictionary<string, int>()
shapes.Add("circle", 1)
shapes.Add("triangle", 3)
shapes.Add("square", 4)

fsharp

let shapes = Map [("circle", 1); ("triangle", 3); ("square", 4)]

clojure

(def m '{circle 1 triangle 1 square 4})

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