Sort strings by length and then abc order

---

examples/sort-two-conditions/sort_by_two_conditions.go

package main

import (
    "fmt"
    "sort"
)

func main() {
    animals := []string{"snail", "dog", "cow", "elephant", "chicken", "mouse"}
    fmt.Println(animals)

    sort.Slice(animals, func(i, j int) bool {
        if len(animals[i]) != len(animals[j]) {
            return len(animals[i]) < len(animals[j])
        }
        return animals[i] < animals[j]
    })
    fmt.Println(animals)

}

[snail dog cow elephant chicken mouse]
[cow dog mouse snail chicken elephant]