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JavaScript - Object Literals

When you define an object "hard-coded style" (object literal), you can do a few things. 


let mystery = "SecretToLife";

let Spaceship =
{
Designation : "NCC-1701",
Name : "Enterprise",
CalculateSpeed() {return 100; },
CalculateCrew: (crew) => { return crew * 1; },

// note the name of this property is set elsewhere!
// this is known as a dynamic property.
[mystery] : 42
};