package inf_test import ( "fmt" "os" "text/tabwriter" "gopkg.in/inf.v0" ) // This example displays the results of Dec.Round with each of the Rounders. // func ExampleRounder() { var vals = []struct { x string s inf.Scale }{ {"-0.18", 1}, {"-0.15", 1}, {"-0.12", 1}, {"-0.10", 1}, {"-0.08", 1}, {"-0.05", 1}, {"-0.02", 1}, {"0.00", 1}, {"0.02", 1}, {"0.05", 1}, {"0.08", 1}, {"0.10", 1}, {"0.12", 1}, {"0.15", 1}, {"0.18", 1}, } var rounders = []struct { name string rounder inf.Rounder }{ {"RoundDown", inf.RoundDown}, {"RoundUp", inf.RoundUp}, {"RoundCeil", inf.RoundCeil}, {"RoundFloor", inf.RoundFloor}, {"RoundHalfDown", inf.RoundHalfDown}, {"RoundHalfUp", inf.RoundHalfUp}, {"RoundHalfEven", inf.RoundHalfEven}, {"RoundExact", inf.RoundExact}, } fmt.Println("The results of new(inf.Dec).Round(x, s, inf.RoundXXX):\n") w := tabwriter.NewWriter(os.Stdout, 0, 0, 1, ' ', tabwriter.AlignRight) fmt.Fprint(w, "x\ts\t|\t") for _, r := range rounders { fmt.Fprintf(w, "%s\t", r.name[5:]) } fmt.Fprintln(w) for _, v := range vals { fmt.Fprintf(w, "%s\t%d\t|\t", v.x, v.s) for _, r := range rounders { x, _ := new(inf.Dec).SetString(v.x) z := new(inf.Dec).Round(x, v.s, r.rounder) fmt.Fprintf(w, "%d\t", z) } fmt.Fprintln(w) } w.Flush() // Output: // The results of new(inf.Dec).Round(x, s, inf.RoundXXX): // // x s | Down Up Ceil Floor HalfDown HalfUp HalfEven Exact // -0.18 1 | -0.1 -0.2 -0.1 -0.2 -0.2 -0.2 -0.2 // -0.15 1 | -0.1 -0.2 -0.1 -0.2 -0.1 -0.2 -0.2 // -0.12 1 | -0.1 -0.2 -0.1 -0.2 -0.1 -0.1 -0.1 // -0.10 1 | -0.1 -0.1 -0.1 -0.1 -0.1 -0.1 -0.1 -0.1 // -0.08 1 | 0.0 -0.1 0.0 -0.1 -0.1 -0.1 -0.1 // -0.05 1 | 0.0 -0.1 0.0 -0.1 0.0 -0.1 0.0 // -0.02 1 | 0.0 -0.1 0.0 -0.1 0.0 0.0 0.0 // 0.00 1 | 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 // 0.02 1 | 0.0 0.1 0.1 0.0 0.0 0.0 0.0 // 0.05 1 | 0.0 0.1 0.1 0.0 0.0 0.1 0.0 // 0.08 1 | 0.0 0.1 0.1 0.0 0.1 0.1 0.1 // 0.10 1 | 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 // 0.12 1 | 0.1 0.2 0.2 0.1 0.1 0.1 0.1 // 0.15 1 | 0.1 0.2 0.2 0.1 0.1 0.2 0.2 // 0.18 1 | 0.1 0.2 0.2 0.1 0.2 0.2 0.2 }