How to Split a String in Golang Using the SplitAfterN Function

A guide on how to use the `SplitAfterN` function in Golang to split a string based on a separator and limit the number of resulting parts. This function is useful when you need to split a string but retain the separator.

In this article, we will explore how to use the SplitAfterN function in Golang to split a string into smaller parts while retaining the separators and limiting the number of output elements. This function is especially useful when you need to split a string without discarding the delimiter.

Go Code

package main

import (
	"fmt"
	"strings"
)

func main() {
	// The string to split
	str := "go,lang,split,after,n"
	
	// Use SplitAfterN to split the string after each comma, limiting to 3 parts
	result := strings.SplitAfterN(str, ",", 3)

	// Print the result
	fmt.Println(result)
}

Detailed explanation:

1. package main: Declares the main package.
2. import "fmt" and import "strings": Imports the fmt and strings packages to work with strings and print the result.
3. str := "go,lang,split,after,n": The string to split.
4. strings.SplitAfterN(str, ",", 3): This function splits the string str into 3 parts using commas (,), keeping the commas in the result.
5. fmt.Println(result): Prints the resulting slice after splitting the string.

Tips:

• SplitAfterN is useful when you need to retain the separator in the result.
• When limiting the number of parts, the remaining string will be stored in the last element.

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