Case insensitive string search in golang

Question

How do I search through a file for a word in a case insensitive manner?

For example

If I'm searching for UpdaTe in the file, if the file contains update, the search should pick it and count it as a match.

Answer 1

strings.EqualFold() can check if two strings are equal, while ignoring case. It even works with Unicode. See http://golang.org/pkg/strings/#EqualFold for more info.

http://play.golang.org/p/KDdIi8c3Ar

package main

import (
    "fmt"
    "strings"
)

func main() {
    fmt.Println(strings.EqualFold("HELLO", "hello"))
    fmt.Println(strings.EqualFold("ÑOÑO", "ñoño"))
}

Both return true.