refactor: ♻️ 2.0 (#3)

src/backend/NSExt/Extensions/IntExtensions.cs

@@ -0,0 +1,41 @@
+namespace NSExt.Extensions;
+
+/// <summary>
+///     IntExtensions
+/// </summary>
+public static class IntExtensions
+{
+    /// <summary>
+    ///     判断枚举是否包含某个位
+    /// </summary>
+    public static bool HasFlag<T>(this int me, T flag)
+        where T : Enum
+    {
+        return ((long)me).HasFlag(flag);
+    }
+
+    /// <summary>
+    ///     生成随机数
+    /// </summary>
+    /// <param name="me">me</param>
+    public static int Rand(this int[] me)
+    {
+        return new Random(Guid.NewGuid().GetHashCode()).Next(me[0], me[1]);
+    }
+
+    /// <summary>
+    ///     ToString 的 Invariant 版本
+    /// </summary>
+    public static string ToInvString(this int me)
+    {
+        return me.ToString(CultureInfo.InvariantCulture);
+    }
+
+    /// <summary>
+    ///     转换成ipv4
+    /// </summary>
+    public static string ToIpV4(this int me)
+    {
+        return string.Join(".", BitConverter.GetBytes(me).Reverse());
+    }
+}