Slice string into letters

Question

How to slice one string in Go language into array of string letters it contains?

For example, turn string \"abc\" into array \"a\", \"b\", \"c\".

Answer 1

Use a conversion to runes, for example

package main

import "fmt"

func main() {
        s := "Hello, 世界"
        for i, r := range s {
                fmt.Printf("i%d r %c\n", i, r)
        }
        fmt.Println("----")
        a := []rune(s)
        for i, r := range a {
                fmt.Printf("i%d r %c\n", i, r)
        }
}

Playground

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Output:

i0 r H
i1 r e
i2 r l
i3 r l
i4 r o
i5 r ,
i6 r  
i7 r 世
i10 r 界
----
i0 r H
i1 r e
i2 r l
i3 r l
i4 r o
i5 r ,
i6 r  
i7 r 世
i8 r 界

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From the link:

Converting a value of a string type to a slice of runes type yields a slice containing the individual Unicode code points of the string. If the string is empty, the result is []rune(nil).