爱好者

<input type="button" onclick="函数名()">

JS所有的事件名称都是以on开头

def estimate_house_sales_price(num_of_bedrooms, sqft, neighborhood):

price = 0




# In my area, the average house costs $200 per sqft

price_per_sqft = 200




if neighborhood == "hipsterton":

# but some areas cost a bit more

price_per_sqft = 400




elif neighborhood == "skid row":

# and some areas cost less

price_per_sqft = 100




# start with a base price estimate based on how big the place is

price = price_per_sqft*sqft




# now adjust our estimate based on the number of bedrooms

if num_of_bedrooms == 0:

# Studio apartments are cheap

price = price — 20000

else:

# places with more bedrooms are usually

# more valuable

price = price + (num_of_bedrooms * 1000)

return price

def estimate_house_sales_price(num_of_bedrooms, sqft, neighborhood):    
    price = 0    
    # In my area, the average house costs $200 per sqft    
    price_per_sqft = 200    
    if neighborhood == "hipsterton":    
    # but some areas cost a bit more    
    price_per_sqft = 400    
    elif neighborhood == "skid row":    
        # and some areas cost less    
        price_per_sqft = 100    
    # start with a base price estimate based on how big the place is    
    price = price_per_sqft*sqft    
    # now adjust our estimate based on the number of bedrooms    
    if num_of_bedrooms == 0:    
        # Studio apartments are cheap    
        price = price — 20000    
    else:    
        # places with more bedrooms are usually    
        # more valuable    
        price = price + (num_of_bedrooms * 1000)    
    return price

func main() { for {} }

type config struct {
	Home         string        `env:"HOME"`
	Port         int           `env:"PORT" envDefault:"3000"`
	IsProduction bool          `env:"PRODUCTION"`
	Hosts        []string      `env:"HOSTS" envSeparator:":"`
	Duration     time.Duration `env:"DURATION"`
	TempFolder   string        `env:"TEMP_FOLDER" envDefault:"${HOME}/tmp" envExpand:"true"`
}

func main() {
	cfg := config{}
if err := env.Parse(&cfg); err != nil {
		fmt.Printf("%+v\n", err)
	}

	fmt.Printf("%+v\n", cfg)
}

package main

import "fmt"

func main() {
 var a = 0.0
 const b = 0.0
 fmt.Println(a / b)
}

type config struct {
  Home         string        `env:"HOME"`
  Port         int           `env:"PORT" envDefault:"3000"`
  IsProduction bool          `env:"PRODUCTION"`
  Hosts        []string      `env:"HOSTS" envSeparator:":"`
  Duration     time.Duration `env:"DURATION"`
  TempFolder   string        `env:"TEMP_FOLDER" envDefault:"${HOME}/tmp" envExpand:"true"`
}

func main() {
  cfg := config{}
  if err := env.Parse(&cfg); err != nil {
    fmt.Printf("%+v\n", err)
  }

  fmt.Printf("%+v\n", cfg)
}

using CliWrap;

var result = await Cli.Wrap("path/to/exe")
    .WithArguments("--foo bar")
    .WithWorkingDirectory("work/dir/path")
    .ExecuteAsync();
    
// 输出包括：
// -- result.ExitCode        (int)
// -- result.StartTime       (开始时间)
// -- result.ExitTime        (结束时间)
// -- result.RunTime         (执行命令耗时)

if expr {
    n = trueVal
} else {
    n = falseVal
}

 -p ":8081"  监听8081
-p ":8081,:8082"  监听8081和8082
 -p ":8081,:8082,:9000-9999" 监听8081和8082以及9000,9001至9999，共1002个端口

askgit "SELECT * FROM commits"

package main

func main() {
var a = 1
if a != 1 {
println("oh no")
    }
}

time GOPATH=/tmp/throw GO111MODULE=on GOPROXY=https://goproxy.io go get github.com/go-sql-driver/mysql
...
real    0m0.934s
user    0m0.188s
sys    0m0.093s

var args struct {    Input    string   `arg:"positional"`    Output   []string `arg:"positional"`    Verbose  bool     `arg:"-v" help:"verbosity level"`    Dataset  string   `help:"dataset to use"`    Optimize int      `arg:"-O" help:"optimization level"`}arg.MustParse(&args)

package main

import "fmt"

func main() {
 fmt.Println(func() {} == func() {})
}

package main

import "fmt"

func main() {
 fmt.Println(func() {} == func() {})
}

var args struct {   
    Input    string   `arg:"positional"`    
    Output   []string `arg:"positional"`    
    Verbose  bool     `arg:"-v" help:"verbosity level"` 
    Dataset  string   `help:"dataset to use"`   
    Optimize int      `arg:"-O" help:"optimization level"`  
}   
arg.MustParse(&args)

package main

func main() {
    var a = 1
    if a != 1 {
        println("oh no")
    }
}

-p ":8081"  监听8081
-p ":8081,:8082"  监听8081和8082
 -p ":8081,:8082,:9000-9999" 监听8081和8082以及9000,9001至9999，共1002个端口

type Widget struct {
    id    int
    attrs []string
}
//下面两种传参有什么区别?
func doSomThing(ss *[]Widget){

}
func doOtherThing(sp []*widget){

}