How to Split Strings and Assign Values in Go?

Splitting Strings and Assigning Values in Go

In Python, splitting a string and assigning the resulting values to variables can be done in one step using the split() method and multiple assignment. However, in Go, this approach fails with the error "assignment count mismatch."

Solution

To split a string and assign values in Go, there are two possible approaches:

Two-Step Approach:

1. Split the string using strings.Split().
2. Assign the resulting slice elements to variables using multiple assignment.

package main

import (
    "fmt"
    "strings"
)

func main() {
    s := strings.Split("127.0.0.1:5432", ":")
    ip, port := s[0], s[1]
    fmt.Println(ip, port)
}

One-Step Approach Using net.SplitHostPort():

This approach leverages the net.SplitHostPort() function, which is designed for extracting the host and port from a network address:

package main

import (
    "fmt"
    "net"
)

func main() {
    host, port, err := net.SplitHostPort("127.0.0.1:5432")
    fmt.Println(host, port, err)
}

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