[Daily] 2021-06-23 WED

LeetCode

Today: Swift

1. Two Sum

Swift basic functions

Summary

• Array

  var arr : [Int] = []
  var arr2 = [Int]()
  var arr3 : Array<Int> = []

  arr.append(2)
  

• For

  for i in arr {}
  for i in 0...n {}
  for i in 0..<n {}
  for i in (0...n).reversed() {}
  for i in (0..<n>).reversed() {}
  for i in stride(from: n, to: 0, by: -2) {}
  

Appendix

• Swift array blog
• Swift for blog
• Swift stride blog