swift - why global static variable is not init?

Question

Problem

• Sometimes (maybe thread) kIndexMinID, kIndexMaxID value is 0

Code

// test.swift
let kIndexMinID :Int    = 100
let kIndexMaxID :Int    = 200

Question

• Why not init value? (when init?)
• How to global variable init ?

Status

• Xcode 8.2.1
• Apple Swift version 3.0.2 (swiftlang-800.0.63 clang-800.0.42.1)

Answer 1

It's highly recommended to encapsulate constants in structs

struct Constants {
   static let kIndexMinID = 100
   static let kIndexMaxID = 200
}

The benefit (apart from the encapsulation) is that the constants are initialized lazily.