vector.swift

struct Vector<T> {
  let size: Int
  let initialValue: T

  struct Position: Equatable {
    let row: Int
    let column: Int
  }

  typealias Matrix = [Position]

  let matrix: Matrix

  init(size: Int, initialValue: T) {
    self.size = size
    self.initialValue = initialValue
    var _matrix: Matrix = []
    for row in 0..<size {
      for column in 0..<size {
        _matrix.append(.init(row: row, column: column))
      }
    }
    self.matrix = _matrix
  }
}

extension Vector: Equatable where T: Equatable {}

let threeVector = Vector<Int>.init(size: 3, initialValue: 0)
threeVector.matrix