fmt verbs in Go

The verb decides the rendering: value, quoted, type, or Go syntax.

type Run struct {
    Lang string
    TPM  float64
}

func verbs() []string {
    run := Run{Lang: "go", TPM: 104.567}
    return []string{
        fmt.Sprintf("%v", run),
        fmt.Sprintf("%+v", run),
        fmt.Sprintf("%#v", run),
        fmt.Sprintf("%T", run),
        fmt.Sprintf("%q|%8.2f|%-8s|", run.Lang, run.TPM, run.Lang),
        fmt.Sprintf("%d %05d %x %b", 42, 42, 255, 5),
    }
}

How it works

1. %v is the default, %+v adds struct field names.
2. %q quotes, %T prints the type, %#v prints Go syntax.
3. Width and precision go between the percent and the verb.

Keywords and builtins used here

• float64
• func
• return
• string
• struct
• type

The run, in numbers

Lines

16

Characters to type

331

Tokens

106

Three-star pace

95 tpm

At the three-star pace of 95 tokens a minute, this run takes about 67 seconds.

Type this snippet

Step 4 of 5 in Strings & formatting, step 28 of 30 in Language basics.

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