github.com/graybobo/golang.org-package-offline-cache@v0.0.0-20200626051047-6608995c132f/x/talks/2015/go-for-java-programmers/google-serial.go (about)

     1  // +build OMIT
     2  
     3  package main
     4  
     5  import (
     6  	"fmt"
     7  	"math/rand"
     8  	"time"
     9  )
    10  
    11  type Result string
    12  
    13  // START1 OMIT
    14  func Google(query string) (results []Result) {
    15  	results = append(results, Web(query))
    16  	results = append(results, Image(query))
    17  	results = append(results, Video(query))
    18  	return
    19  }
    20  
    21  // STOP1 OMIT
    22  
    23  // START2 OMIT
    24  var (
    25  	Web   = fakeSearch("web")
    26  	Image = fakeSearch("image")
    27  	Video = fakeSearch("video")
    28  )
    29  
    30  type Search func(query string) Result // HL
    31  
    32  func fakeSearch(kind string) Search {
    33  	return func(query string) Result {
    34  		time.Sleep(time.Duration(rand.Intn(100)) * time.Millisecond)
    35  		return Result(fmt.Sprintf("%s result for %q\n", kind, query))
    36  	}
    37  }
    38  
    39  // STOP2 OMIT
    40  
    41  func init() {
    42  	rand.Seed(time.Now().UnixNano())
    43  }
    44  
    45  func main() {
    46  	start := time.Now()
    47  	results := Google("golang") // HL
    48  	elapsed := time.Since(start)
    49  	fmt.Println(results)
    50  	fmt.Println(elapsed)
    51  }