updates

1 files changed, 23 insertions, 0 deletions

diff --git a/Extensions.cs b/Extensions.cs
new file mode 100644
index 0000000..6303c8c
--- /dev/null
+++ b/Extensions.cs
@@ -0,0 +1,23 @@
+namespace Q1Emu;
+
+using System.Collections.Generic;
+
+public static class Extensions
+{
+    public static IEnumerable<int> AllIndexesOf<T>(this IEnumerable<T> arr, T q)
+    {
+        var indexes = new List<int>();
+        int index = 0;
+
+        foreach (var item in arr)
+        {
+            if (EqualityComparer<T>.Default.Equals(item, q))
+            {
+                indexes.Add(index);
+            }
+            index++;
+        }
+
+        return indexes;
+    }
+}
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