GoLang生成留存率时间周期

快来打我* 2022-12-20 08:37 140阅读 0赞

## 需求 ##

生成留存率生成周期

package main
    
    import (
    	"flag"
    	"fmt"
    	"regexp"
    	"strconv"
    	"strings"
    	"time"
    )
    
    const (
    	layoutISO = "2006/01/02 15:04:05"
    )
    
    var flagNow string
    
    func init() { 
    	flag.StringVar(&flagNow, "now", "", "set current time,if empty,will use now time")
    	flag.Parse()
    }
    
    func main() { 
    	if len(flagNow) == 0 { 
    		flagNow = time.Now().Format(layoutISO)
    	} else { 
    		flagNow = strings.ReplaceAll(flagNow, "-", "/")
    	}
    	re := regexp.MustCompile(`(?P<year>\d{2,4})[\D]{1}(?P<month>\d{1,2})[\D]{1}(?P<day>\d{1,2})(\s+(?P<hour>\d{1,2}):(?P<min>\d{1,2}):(?P<sec>\d{1,2}))?`)
    	match := re.FindStringSubmatch(flagNow)
    	subMatchMap := make(map[string]int)
    	for i, name := range re.SubexpNames() { 
    		if i != 0 && len(name) > 0 { 
    			subMatchMap[name], _ = strconv.Atoi(match[i])
    		}
    	}
    	flagNow = fmt.Sprintf("%04d/%02d/%02d %02d:%02d:%02d",
    		subMatchMap["year"], subMatchMap["month"], subMatchMap["day"], subMatchMap["hour"], subMatchMap["min"], subMatchMap["sec"])
    
    	now, err := time.Parse(layoutISO, flagNow)
    	if err != nil { 
    		panic(err)
    	}
    
    	fmt.Printf("now=%s %s (%d)\n", now.Format("2006/01/02 15:04:05"), now.Weekday(), int(now.Weekday()))
    
    	i := 0
    	for i < 20 { 
    		start := time.Date(now.Year(), now.Month(), now.Day()-7*i-int(now.Weekday()), 0, 0, 0, 0, time.UTC)
    		end := time.Date(now.Year(), now.Month(), now.Day()-7*i+int(now.Weekday()), 23, 59, 59, 0, time.UTC)
    
    		fmt.Printf("%d) %s [%s] ~ %s [%s]\n", i,
    			start.Format("2006/01/02 15:04:05"), start.Weekday(),
    			end.Format("2006/01/02 15:04:05"), end.Weekday())
    		i++
    	}
    }

## 测试 ##

F:\mycode\go>go run genWeek.go --now "2020-11-11 12:30:05"
    now=2020/11/11 12:30:05 Wednesday (3)
    0) 2020/11/08 00:00:00 [Sunday] ~ 2020/11/14 23:59:59 [Saturday]
    1) 2020/11/01 00:00:00 [Sunday] ~ 2020/11/07 23:59:59 [Saturday]
    2) 2020/10/25 00:00:00 [Sunday] ~ 2020/10/31 23:59:59 [Saturday]
    3) 2020/10/18 00:00:00 [Sunday] ~ 2020/10/24 23:59:59 [Saturday]
    4) 2020/10/11 00:00:00 [Sunday] ~ 2020/10/17 23:59:59 [Saturday]
    5) 2020/10/04 00:00:00 [Sunday] ~ 2020/10/10 23:59:59 [Saturday]
    6) 2020/09/27 00:00:00 [Sunday] ~ 2020/10/03 23:59:59 [Saturday]
    7) 2020/09/20 00:00:00 [Sunday] ~ 2020/09/26 23:59:59 [Saturday]
    8) 2020/09/13 00:00:00 [Sunday] ~ 2020/09/19 23:59:59 [Saturday]
    9) 2020/09/06 00:00:00 [Sunday] ~ 2020/09/12 23:59:59 [Saturday]
    10) 2020/08/30 00:00:00 [Sunday] ~ 2020/09/05 23:59:59 [Saturday]
    11) 2020/08/23 00:00:00 [Sunday] ~ 2020/08/29 23:59:59 [Saturday]
    12) 2020/08/16 00:00:00 [Sunday] ~ 2020/08/22 23:59:59 [Saturday]
    13) 2020/08/09 00:00:00 [Sunday] ~ 2020/08/15 23:59:59 [Saturday]
    14) 2020/08/02 00:00:00 [Sunday] ~ 2020/08/08 23:59:59 [Saturday]
    15) 2020/07/26 00:00:00 [Sunday] ~ 2020/08/01 23:59:59 [Saturday]
    16) 2020/07/19 00:00:00 [Sunday] ~ 2020/07/25 23:59:59 [Saturday]
    17) 2020/07/12 00:00:00 [Sunday] ~ 2020/07/18 23:59:59 [Saturday]
    18) 2020/07/05 00:00:00 [Sunday] ~ 2020/07/11 23:59:59 [Saturday]
    19) 2020/06/28 00:00:00 [Sunday] ~ 2020/07/04 23:59:59 [Saturday]