very first iteration

util/util.go

@@ -0,0 +1,54 @@
+// vi:ts=4:sts=4:sw=4:noet:tw=72
+
+package util
+
+import (
+	"bytes"
+	"math/rand"
+	"strconv"
+	"time"
+)
+
+func ToInt(v interface{}) int {
+	switch v.(type) {
+	case int:
+		return v.(int)
+	case float64:
+		return int(v.(float64))
+	case string:
+		ret, _ := strconv.Atoi(v.(string))
+		return ret
+	default:
+		return 0
+	}
+}
+
+func NumberToString(n int, sep rune) string {
+	start := 0
+	var buf bytes.Buffer
+
+	s := strconv.Itoa(n)
+	if n < 0 {
+		start = 1
+		buf.WriteByte('-')
+	}
+	l := len(s)
+	ci := 3 - ((l - start) % 3)
+	if ci == 3 {
+		ci = 0
+	}
+	for i := start; i < l; i++ {
+		if ci == 3 {
+			buf.WriteRune(sep)
+			ci = 0
+		}
+		ci++
+		buf.WriteByte(s[i])
+	}
+	return buf.String()
+}
+
+func Random(min, max int) int {
+	rand.Seed(time.Now().Unix())
+	return rand.Intn(max-min) + min
+}