Adds remove functions for table to list helper standard library

Upsilon/BaseTypes/ScriptTypeInterfaces/IITerable.cs

@@ -1,5 +1,4 @@
 using System.Collections.Generic;
-using Upsilon.Evaluator;
 
 namespace Upsilon.BaseTypes.ScriptTypeInterfaces
 {

Upsilon/StandardLibraries/ListLibrary.cs

@@ -1,5 +1,9 @@
+using System.Collections.Generic;
 using Upsilon.BaseTypes;
+using Upsilon.BaseTypes.ScriptTable;
 using Upsilon.BaseTypes.ScriptTypeInterfaces;
+using Upsilon.BaseTypes.UserData;
+using Upsilon.Text;
 
 namespace Upsilon.StandardLibraries
 {
@@ -17,5 +21,31 @@ namespace Upsilon.StandardLibraries
             }
             return false;
         }
+
+        [ScriptFunction("remove", "Removes an object from a table.", directScriptManipulation: true)]
+        public void Remove(ListUserData userList, ScriptType obj)
+        {
+            userList.List.Remove(obj);
+        }
+
+        [ScriptFunction("remove", "Removes an object from a table.", directScriptManipulation: true)]
+        public void Remove(NumeratedScriptTable scriptTable, ScriptType obj)
+        {
+            var enumerator = scriptTable.GetEnumerator();
+            var toRemove = new List<int>();
+            var i = 1;
+            while (enumerator.MoveNext())
+            {
+                var current = enumerator.Current;
+                if (current == obj)
+                    toRemove.Add(i);
+                i++;
+            }
+            enumerator.Dispose();
+            foreach (var index in toRemove)
+            {
+                scriptTable.Set(null, new TextSpan(), index.ToScriptType(), new ScriptNull());
+            }
+        }
     }
 }