context.go
func (ctx *Context) ParamsFloat64(name string) float64 {
	v, _ := strconv.ParseFloat(ctx.Params(name), 64)
	return v
}
func (ctx *Context) ParamsFloat64(name string) float64 {
	v, _ := strconv.ParseFloat(ctx.Params(name), 64)
	return v
}
// ParamsFloat64 returns params result in int64 type.
// e.g. ctx.ParamsFloat64(":uid")