Go by Example: Sorting by Functions

Ba’zan to’plamni uning tabiiy tartibidan boshqa narsa bo’yicha saralashni xohlaymiz. Masalan, faraz qilaylik, satrlarni alifbo tartibida emas, balki uzunligi bo’yicha saralashni xohladik. Mana Go’da maxsus saralashga misol.

 
package main
 
import (
    "cmp"
    "fmt"
    "slices"
)
 
func main() {
    fruits := []string{"peach", "banana", "kiwi"}

Satr uzunliklari uchun taqqoslash funksiyasini amalga oshiramiz. cmp.Compare bunga yordam beradi.

 
    lenCmp := func(a, b string) int {
        return cmp.Compare(len(a), len(b))
    }

Endi fruitsni nom uzunligi bo’yicha saralash uchun bu maxsus taqqoslash funksiyasi bilan slices.SortFuncni chaqira olamiz.

 
    slices.SortFunc(fruits, lenCmp)
    fmt.Println(fruits)

O’rnatilgan tip bo’lmagan qiymatlar slice’ini saralash uchun xuddi shu usuldan foydalanishimiz mumkin.

 
    type Person struct {
        name string
        age  int
    }
 
    people := []Person{
        Person{name: "Jax", age: 37},
        Person{name: "TJ", age: 25},
        Person{name: "Alex", age: 72},
    }

peopleni yoshi bo’yicha slices.SortFunc yordamida saralang.

Eslatma: agar Person struct katta bo’lsa, slice o’rniga *Personni o’z ichiga olishini xohlashingiz va saralash funksiyasini shunga moslab sozlashingiz mumkin. Shubhangiz bo’lsa, benchmark qiling!

 
    slices.SortFunc(people,
        func(a, b Person) int {
            return cmp.Compare(a.age, b.age)
        })
    fmt.Println(people)
}
 
$ go run sorting-by-functions.go 
[kiwi peach banana]
[{TJ 25} {Jax 37} {Alex 72}]

Keyingi misol: .

mualliflar: Mark McGranaghan va Eli Bendersky | tarjima: @elchintoyirov | manba | litsenziya