题解 | 简单错误记录

package main

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

// 错误信息
type errMes struct {
	name  string
	line  int
	times int
}

func main() {
	errMesSlice := make([]errMes, 0)
	errMesMap := make(map[string]int)
	for true {
		var url string
		var line int
		_, err := fmt.Scan(&url, &line)
		if err != nil {
			break
		}

		urlSlice := strings.Split(url, "\\")
		fileName := urlSlice[len(urlSlice)-1]
		if len(fileName) > 16 {
			fileName = fileName[len(fileName)-16:]
		}

		if item, exist := errMesMap[fileName+strconv.Itoa(line)]; exist {
			// map中已有记录，说明错误已加入到切片了，那么item就是切片的下表
			errMesSlice[item].times++
		} else {
			errMesSlice = append(errMesSlice, errMes{
				name:  fileName,
				line:  line,
				times: 1,
			})
			// 把新加入切片的下表，存入map中
			errMesMap[fileName+strconv.Itoa(line)] = len(errMesSlice) - 1
		}
	}
	result := make([]errMes, 8)
	if len(errMesSlice) > 8 {
		result = errMesSlice[len(errMesSlice)-8:]
	} else {
        result = errMesSlice
    }
	for _, errRow := range result {
		fmt.Println(errRow.name, errRow.line, errRow.times)
	}
}