Golang Code

Substring: How to Split a String

· 142 words · 1 minute read #substring #split #characters #rune #convert

In the example below we are looking at how to take the first x number of characters from the start of a string. If we know a character we want to separate on, like a space, we can use strings.Split() instead. But for this we’re looking to get the first 6 characters as a new string.

To do this we first convert it into a rune, allowing for better support in different languages and allowing us to use it like an array. Then we pick the first characters using [0:6] and converting it back to a string.

package main

import (
    "fmt"
)

func main() {

    myString := "Hello! This is a golangcode.com test ;)"

    // Step 1: Convert it to a rune
    a := []rune(myString)

    // Step 2: Grab the num of chars you need
    myShortString := string(a[0:6])

    fmt.Println(myShortString)
}

Example:

Image of Author Edd Turtle

Author: Edd Turtle

Edd is the Lead Developer at Hoowla, a prop-tech startup, where he spends much of his time working on production-ready Go and PHP code.

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