gozzo 尜舟

The utils in golang.

浮点数 decimal

package main
import (
    "fmt"

    "github.com/azhai/gozzo/decimal"
)

// 浮点数
func main() {
    x := 123.45678
    a := decimal.NewDecimal(decimal.RoundN(x, 2), 2)
    fmt.Println(a.String()) // 123.45
    b := decimal.ParseDecimal(a.String(), 2)
    fmt.Println(b.String()) // 123.45
}

文件操作 filesystem

package main

import (
    "fmt"

    fs "github.com/azhai/gozzo/filesystem"
)

// 文件计行
func main() {
    filename := "README.md"
    count := fs.LineCount(filename)

    // 逐行返回，适用于大文件
    var lines []string
    r := fs.NewLineReader(filename)
    for r.Reading() {
        lines = append(lines, r.Text())
    }
    if len(lines) == count {
        fmt.Printf("%s have %d lines\n", filename, count)
    } else {
        fmt.Println("Error !")
    }
}

文件日志 logging

package main

import (
    "math"
    "time"

    "github.com/azhai/gozzo/logging"
)

// CalcAge 计算年龄
func CalcAge(birthday string) int {
    birth, err := time.Parse("2006-01-02", birthday)
    if err != nil {
        return -1
    }
    hours := time.Since(birth).Hours()
    return int(math.Round(hours / 24 / 365.25))
}

func main() {
    birthday := "1996-02-29"
    age := CalcAge(birthday)
    logger := logging.NewLoggerURL("debug", "stdout") // 输出到屏幕
    logger.Infof("I was born on %s, I am %d years old.", birthday, age)
}

go代码美化 rewrite

➜ make && ./bin/rew -h

#/usr/local/go/bin/go clean
rm -f ./bin/*
Clean all.
Compile rew ...
GOOS=darwin GOARCH=amd64 CGO_ENABLED=1 /usr/local/go/bin/go build -ldflags="-s -w" -o ./bin/rew ./cmd/rew
Build success.

Version: v1.4.2
Usage: rew [flags] [dir ...]
  -v    display more information