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Assets/Dreamteck/Utilities/ArrayUtility.cs

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+namespace Dreamteck
+{
+    public static class ArrayUtility
+    {
+        public static void Add<T>(ref T[] array, T item)
+        {
+            T[] newArray = new T[array.Length + 1];
+            array.CopyTo(newArray, 0);
+            newArray[newArray.Length - 1] = item;
+            array = newArray;
+        }
+        public static bool Contains<T>(T[] array, T item)
+        {
+            for (int i = 0; i < array.Length; i++)
+            {
+                if (array[i].Equals(item)) return true;
+            }
+            return false;
+        }
+        public static int IndexOf<T>(T[] array, T value)
+        {
+            for (int i = 0; i < array.Length; i++)
+            {
+                if (array[i].Equals(value)) return i;
+            }
+            return 0;
+        }
+        public static void Insert<T>(ref T[] array, int index, T item)
+        {
+            T[] newArray = new T[array.Length + 1];
+            for (int i = 0; i < newArray.Length; i++)
+            {
+                if (i < index) newArray[i] = array[i];
+                else if (i > index) newArray[i] = array[i - 1];
+                else newArray[i] = item;
+            }
+            array = newArray;
+        }
+
+
+        public static void RemoveAt<T>(ref T[] array, int index)
+        {
+            if (array.Length == 0) return;
+            T[] newArray = new T[array.Length - 1];
+            for (int i = 0; i < array.Length; i++)
+            {
+                if (i < index) newArray[i] = array[i];
+                else if (i > index) newArray[i-1] = array[i];
+            }
+            array = newArray;
+        }
+    }
+}