最近发现不少小伙伴都对Golang很感兴趣，所以今天继续给大家介绍Golang相关的知识，本文《更新结构中的映射式数据结构》主要内容涉及到等等知识点，希望能帮到你！当然如果阅读本文时存在不同想法，可以在评论中表达，但是请勿使用过激的措辞~
问题内容package main
import "fmt"
type State string
const (
// PASS check passed.
PASS State = "PASS"
// FAIL check failed.
FAIL = "FAIL"
// WARN could not carry out check.
WARN = "WARN"
// INFO informational message
INFO = "INFO"
// SKIP for tests skipped
SKIP = "SKIP"
)
// SummaryLevelWise is a summary of results of control checks run CIS Levelwise
type Something struct{
SummaryLevelWise map[string]*Summary
}
// Summary is a summary of the results of control checks run.
type Summary struct {
Pass int `json:"total_pass"`
Fail int `json:"total_fail"`
Warn int `json:"total_warn"`
Info int `json:"total_info"`
Skip int `json:"total_skip"`
}
func main() {
s := &Something{}
s.doingSomething()
// This is one way I tried to update the map[string]*struct variable
s.SummaryLevelWise["1"].Pass, s.SummaryLevelWise["1"].Fail, s.SummaryLevelWise["1"].Warn, s.SummaryLevelWise["1"].Info, s.SummaryLevelWise["1"].Skip = 0,0,0,0,0
// Another way that didn't work
// s.SummaryLevelWise["1"] = &Summary{0,0,0,0,0}
}
func summarizeLevel(summary *Summary) {
switch PASS{
case PASS:
summary.Pass++
case FAIL:
summary.Fail++
case WARN:
summary.Warn++
case INFO:
summary.Info++
case SKIP:
summary.Skip++
}
}
func(something *Something ) doingSomething(){
level1 := "1"
for i:=0; i<10; i++ {
summarizeLevel(something.SummaryLevelWise[level1])
}
fmt.Println(something)
}我得到的错误是
恐慌：运行时错误：无效的内存地址或零指针 取消引用 [信号 sigsegv：分段违规代码=0x1 addr=0x0 电脑=0x1091ac4] goroutine 1 [运行]: main.summarizelevel(...) /users/i345678/go/src/github.concur.com/test/test/main.go:68 main.(*something).doingsomething(0xc00000c028) /users/i345678/go/src/github.concur.com/test/test/main.go:89 +0x64 main.main() /users/i345678/go/src/github.concur.com/test/test/main.go:58 +0x44 退出状态 2
级别字符串的值为“1”和“2”。
解决方案
func main() {
s := &Something{}
// Intialize map.
s.SummaryLevelWise = map[string]*Summary{}
//s.SummaryLevelWise["1"].Pass, s.SummaryLevelWise["1"].Fail, s.SummaryLevelWise["1"].Warn, s.SummaryLevelWise["1"].Info, s.SummaryLevelWise["1"].Skip = 0,0,0,0,0
s.SummaryLevelWise["1"] = &Summary{0,0,0,0,0}
s.doingSomething()
}地图可以为零。因此需要初始化它们。
以上就是《更新结构中的映射式数据结构》的详细内容，更多关于的资料请关注编程网公众号！
