Object0.25.3

obj = new {
  name = "Pigeon" // property
  "Hello"       // element
  ["two"] = 2   // entry
}

obj.name   // "Pigeon"
obj[0]     // "Hello"
obj["two"] // 2

An object can be amended to create variants of itself. This is similar to inheritance in prototype-oriented programming.

pigeon = new { name = "Pigeon"; age = 42 }
barnOwl = (pigeon) { name = "Barn Owl" } // override property `name`
oldPigeon = (pigeon) { age = 84 } // override property `age`

Object members may reference other members:

thresholds = new { lower = 10; upper = lower + 5 }

Object members are dynamically bound. This is similar to how computed cells in a spreadsheet work.

thresholds = new { lower = 10; upper = lower + 5 }
thresholds2 = new { lower = 7 } // thresholds2.upper == 12

Objects have memberwise equality and hash code.

To arbitrarily manipulate an object, convert it to a Collection. If necessary, the manipulated Collection can be converted back to an Object.

pigeon = new { name = "Pigeon"; age = 42 }
manipulated = pigeon.toMap().mapKeys((key, value) -> key.reverse())
manipulated.toDynamic() // new { eman = "Pigeon"; ega = 42 }