Durations in Go

A Duration is a count of nanoseconds with units in the literal.

func durations() []string {
    timeout := 1500 * time.Millisecond
    budget := 2 * time.Minute

    started := time.Now().Add(-90 * time.Second)
    elapsed := time.Since(started)

    return []string{
        timeout.String(),
        fmt.Sprintf("%.1f", timeout.Seconds()),
        budget.String(),
        elapsed.Round(time.Second).String(),
        (budget - elapsed).Truncate(time.Second).String(),
    }
}

How it works

Multiply by a unit constant: 5 * time.Second.
Since and Sub return Durations you can round.
Truncate and Round control how it prints.

Keywords and builtins used here

func
return
string

The run, in numbers

Lines: 15
Characters to type: 350
Tokens: 109
Three-star pace: 100 tpm

At the three-star pace of 100 tokens a minute, this run takes about 65 seconds.

Type this snippet

Step 2 of 2 in Time, step 5 of 26 in Standard library & project layout.

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