irb(main):001:0> a = [3,2,1]
=> [3, 2, 1]
irb(main):002:0> a.sort
=> [1, 2, 3]
irb(main):003:0> a
=> [3, 2, 1]

a_list = [3,2,1]
a_list.sort() # None
a_list # [1,2,3]

如果你不想影响a_list，则可以用sorted方法。

a_list = [3,2,1]
sorted(a_list)
 # [1,2,3]

const arr = ["peach", "straw", "apple", "spork"];
arr.sort();

const arr = [5, 2, 3, 7, 9, 1];
arr.sort((a, b) => b - a);

import "sort"

strs := []string{"c", "a", "b"}
sort.Strings(strs)
fmt.Println("Strings:", strs)

ints := []int{7, 2, 4}
sort.Ints(ints)
fmt.Println("Ints:   ", ints)