CODEWITHSUNDEEP
go
chefcurry7
chefcurry7

Reputation: 5241

Get character at index of string

func lengthOfLongestSubstring(s string) {
    match := make(map[string]int)
    var current string

    current = s[0]

    if match[current] == 1 {
        ///
    }

}

Why do I get the error cannot use s[0] (type byte) as type string in assignment? As far as I can tell it's clear that s is of type string, why does accessing a character turn it into type byte?

Upvotes: 4

Views: 13693

Answers (2)

Heissenberger
Heissenberger

Reputation: 306

Let's read how one of the Go designers look at strings in go:

In Go, a string is in effect a read-only slice of bytes. If you're at all uncertain about what a slice of bytes is or how it works, please read the previous blog post; we'll assume here that you have.

It's important to state right up front that a string holds arbitrary bytes. It is not required to hold Unicode text, UTF-8 text, or any other predefined format. As far as the content of a string is concerned, it is exactly equivalent to a slice of bytes.

So, apparently in your case, s[0] is a byte type, you need explicit case if you really need the assignment.

Upvotes: 5

Xian Shu
Xian Shu

Reputation: 708

func lengthOfLongestSubstring(s string) {
    strArr:=[]rune(s) 
    fmt.Println(string(strArr[0]))

}

Upvotes: 8

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