String Replacement and Building

Matnni almashtirish va qurish

Matn ichidagi biror qismni boshqasiga almashtirish kerak bo'lsa — strings.Replace/ReplaceAll. Matnni bo'lak-bo'lak yig'ish kerak bo'lsa esa — strings.Builder.

example.go

package main

import (
	"fmt"
	"strings"
)

func main() {
	text := "cat sat on the mat"
	fmt.Println(strings.ReplaceAll(text, "at", "og"))

	var b strings.Builder
	b.WriteString("Salom")
	b.WriteString(", ")
	b.WriteString("dunyo!")
	fmt.Println(b.String())
}

ReplaceAll matndagi barcha nusxalarini almashtiradi (Replace(s, old, new, n) esa faqat birinchi n tasini). strings.Builder — matnni bo'lak-bo'lak yig'ish uchun samarali qurilma: xuddi Lego bloklarini bittalab qo'shib katta qasr qurgandek, oddiy + bilan matn qo'shishdan ancha tezroq ishlaydi, ayniqsa ko'p marta qo'shilganda.

>_ Exercise

strings.Builder yordamida bo'lakchalarni birlashtiring, so'ng birinchi almashtirishni bajaring.

•strings.Builder yordamida parts'ni "-" bilan birlashtirib bitta matn hosil qiling
•natijani chop eting
•natijadagi birinchi "-" ni "_" ga almashtirib yana bir marta chop eting (strings.Replace, n=1)

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Key Takeaway

Key Takeaway:

Ko'p marta matn qo'shish kerak bo'lganda strings.Builder ishlating — u + bilan qo'shishdan tezroq. Almashtirish uchun Replace (chegaralangan) yoki ReplaceAll (hammasi) ishlating.

NEXT UP

Type Conversions with strconv

OUTPUT

$ go run main.go
Kodingizni ishga tushiring