The JavaScript String indexOf function is used to find the index of a specified substring within a string. It takes one or two arguments, the first being the substring to search for and the second being an optional starting index. If the substring is found, the function returns the index of the first occurrence of the substring within the string. If the substring is not found, the function returns -1. The function is case-sensitive, meaning that it will only match substrings that have the same case as the search string. Keep reading below to learn how to Javascript String indexOf in Go.

Looking to get a head start on your next software interview? Pickup a copy of the best book to prepare: Cracking The Coding Interview!

Buy Now On Amazon

Javascript String indexOf in Go With Example Code

JavaScript’s `indexOf` method is a useful tool for finding the index of a specific character or substring within a string. If you’re working with Go, you might be wondering how to achieve the same functionality. Fortunately, Go provides a built-in function that can accomplish this task: `strings.Index`.

To use `strings.Index`, you’ll need to pass in two arguments: the string you want to search, and the substring you’re looking for. The function will return the index of the first occurrence of the substring within the string, or -1 if the substring is not found.

Here’s an example of how to use `strings.Index` in Go:

package main

import (

func main() {
str := "Hello, world!"
index := strings.Index(str, "world")
fmt.Println(index) // Output: 7

In this example, we’re searching for the substring “world” within the string “Hello, world!”. The `strings.Index` function returns the index of the first occurrence of “world”, which is 7.

Keep in mind that `strings.Index` is case-sensitive, so if you’re searching for a substring that could be capitalized differently, you’ll need to convert both the string and the substring to the same case before searching.

Overall, `strings.Index` is a powerful tool for finding substrings within strings in Go. With this function in your toolkit, you’ll be able to easily search and manipulate strings in your Go programs.

Equivalent of Javascript String indexOf in Go

In conclusion, the equivalent function of Javascript’s String indexOf in Go is the strings.Index function. This function returns the index of the first occurrence of a substring within a given string. It is a useful tool for searching and manipulating strings in Go programming. By understanding the similarities and differences between these two functions, developers can easily transition between the two languages and efficiently work with strings in their code. Whether you are a beginner or an experienced developer, the strings.Index function in Go is a valuable tool to have in your programming arsenal.

Contact Us