How to use class constant to initialize variable - solution is use lazy variable

variable_with_class_constant_length

import Foundation

class Foo {
    let length = 255
    
    // !!! not like this because self.length can't be used here
    // var arrayConstantLength = [Byte](count:self.length, repeatedValue:0)
    
    // but like this (with lazy I can use self.length constant)
    lazy var arrayConstantLength:[Byte] = {
       [unowned self] in return [Byte](count: self.length, repeatedValue: 0)
    }()
}

let q = Foo().arrayConstantLength