Swift_字典是无序的

var interestingNumbers = ["primes": [2, 3, 5, 7, 11, 13, 17],
                          "triangular": [1, 3, 6, 10, 15, 21, 28],
                          "hexagonal": [1, 6, 15, 28, 45, 66, 91]]
print(interestingNumbers)
# 第一次log: ["triangular": [1, 3, 6, 10, 15, 21, 28], "hexagonal": [1, 6, 15, 28, 45, 66, 91], "primes": [2, 3, 5, 7, 11, 13, 17]]
# 第二次log: ["hexagonal": [1, 6, 15, 28, 45, 66, 91], "triangular": [1, 3, 6, 10, 15, 21, 28], "primes": [2, 3, 5, 7, 11, 13, 17]]