duanchen7401
duanchen7401
2019-06-27 20:28

从字符串值更新map [string] int [关闭]

已采纳

I am trying to parse a json-like string which looks like this.

"abc:9, bar:3"

What I would like to have at the end is a map[string]int which looks like this:

map[string]int{"abc":9, "bar":3}

I have gotten as far as splitting it into a set of 'pairs', like so:

`["abc:9", "bar:3"]

I am struggling with how to get that structure into the final map[string]int. I have tried ranging over the slice, but I am missing how to actually get it into the map.

        val := "abc:9, bar:3"
        lsd := make(map[string]int)
        c := strings.Split(val, ",")
        for k, v := range c {
            lsd = v[k] // where I am struggling, I know this is wrong, but I can't seem to find the proper syntax and tools for this
        }

Can anyone point me in the right direction to end up with the map[string]int I am looking for here?

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1条回答

  • dounabi6295 dounabi6295 2年前

    This is a tiny bit cheesy but I was having trouble making fmt.Sscanf grok the pattern, so I am just splitting again. And you may have been missing strconv - strconv.Atoi is a quick converter.

    package main

import (
    "fmt"
    "strconv"
    "strings"
)

func main() {
    lsd := make(map[string]int)
    toParse := "abc:5, foo:5"
    parts := strings.Split(toParse, ", ")
    for _, p := range parts {

        results := strings.SplitN(p, ":", 2)
        val, err := strconv.Atoi(results[1])
        if err != nil {
            panic(err)  //probably want to do somethig better
        }
        lsd[results[0]] = val
    }

    fmt.Printf("%#v", lsd)
}

    map[string]int{"abc":5, "foo":5}

    https://play.golang.org/p/UadibEzTXWU

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