Question

How to case-insensitively check if a character exists in a string with Go

Answer 1

package main

import (
    "fmt"
    "strings"
)

// Case-insensitive check without a loop
func charExistsIgnoreCase(s string, target byte) bool {
    // Convert both to lowercase and use Contains()
    return strings.Contains(strings.ToLower(s), strings.ToLower(string(target)))
}

func main() {
    // Define the string we want to search in
    s := "GoLanguage"

    // Perform the case-insensitive check
    exists := charExistsIgnoreCase(s, 'g')

    // Print the raw boolean result
    fmt.Println(exists)

    // Conditional check
    if exists {
        fmt.Println("exists")
    } else {
        fmt.Println("not exists")
    }
}



/*
run:

true
exists

*/

 

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