Unexpected behavior from for loop

Question

I sure hope this is something simple. When I grab information from within an if statement that is inside of a for loop it is not carried to outside of the for loop. I can print the information from within the if statement just fine and then lose it afterwards. Am I missing something? Coming from Python I have never experienced this before.

func main() {
    var neededinfo string
    for _, slice := range info_slices {
        // Get information out of slices
        if strings.Contains(slice, "indicator ") {
            neededinfo := string(ExeSH("echo '" + slice + "' | awk '{ print $4 }'"))
            neededinfo = neededinfo[1:len(neededinfo)-2]
            fmt.Println(neededinfo) // Returns my information
        }
    }
    fmt.Println(neededinfo) // Returns nothing
}

why are you initializing neededinfo again inside the loop? — ymg
– ymg, Commented Jul 9, 2014 at 23:51
I would remove the colon on the first line after your if statement and then see if that works, because var is technically initializing the variable. — ymg
– ymg, Commented Jul 9, 2014 at 23:52

fabmilo · Accepted Answer · 2014-07-10 00:29:02Z

2

Most likely is the fact that you are overwriting the neededinfo variable

func main() {
    var neededinfo []string
    for _, slice := range info_slices {
        // Get information out of slices
        if strings.Contains(slice, "indicator ") {
            response := string(ExeSH("echo '" + slice + "' | awk '{ print $4 }'"))
            neededinfo = append(neededinfo, response[1:len(response)-2]
        }
    }
    fmt.Println(neededinfo) 
}

edited Jul 10, 2014 at 0:29

answered Jul 9, 2014 at 23:54

fabmilo

48.5k16 gold badges108 silver badges123 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

Unexpected behavior from for loop

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related