Refactor to improve iterations

- Use function abstractions (such as map, reduce, filter etc.) over
  for-of loops to gain benefits of having less side effects and easier
  readability.
- Enable `downLevelIterations` for writing modern code with lazy evaluation.
- Refactor for of loops to named abstractions to clearly express their
  intentions without needing to analyse the loop itself.
- Add missing cases for changes that had no tests.

tests/unit/application/Parser/Script/Compiler/Expressions/ExpressionsCompiler.spec.ts

@@ -151,6 +151,14 @@ describe('ExpressionsCompiler', () => {
             .withArgument('parameter2', 'value'),
           expectedError: 'parameter value(s) not provided for: "parameter1", "parameter3" but used in code',
         },
+        {
+          name: 'parameter names are not repeated in error message',
+          expressions: [
+            new ExpressionStub().withParameterNames(['parameter1', 'parameter1', 'parameter2', 'parameter2'], false),
+          ],
+          args: new FunctionCallArgumentCollectionStub(),
+          expectedError: 'parameter value(s) not provided for: "parameter1", "parameter2" but used in code',
+        },
       ];
       for (const testCase of testCases) {
         it(testCase.name, () => {