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10 things you (probably) don't know about Go

 6 years ago
source link: https://talks.golang.org/2012/10things.slide
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10 things you (probably) don't know about Go

10 things you (probably) don't know about Go

Andrew Gerrand

Gopher

1. Anonymous structs

  • Grouped globals
var config struct {
    APIKey      string
    OAuthConfig oauth.Config
}

config.APIKey = "BADC0C0A"
  • Template data
data := struct {
    Title string
    Users []*User
}{
    title,
    users,
}
err := tmpl.Execute(w, data)

(Cheaper and safer than using map[string]interface{}.)

2

1b. Anonymous structs

  • Test tables
var indexRuneTests = []struct {
    s    string
    rune rune
    out  int
}{
    {"a A x", 'A', 2},
    {"some_text=some_value", '=', 9},
    {"☺a", 'a', 3},
    {"a☻☺b", '☺', 4},
}
  • Embedded lock
var hits struct {
    sync.Mutex
    n int
}

hits.Lock()
hits.n++
hits.Unlock()

3

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