How to reactively check for an error after an operation fails, and how a subsequent successful operation clears the error state.
Illustrates lazy evaluation by creating a custom 'Repeat' function that executes a code block (passed with `ByExpr`) a specified number of times.
Illustrates the core relationship between the uCalc engine, an Item (variable), and a compiled Expression.
Internal Test (Configurability) Verifying that `{@StatementSeparator}` respects the engine's definition (e.g., checking if it correctly ignores a comma used as a parameter separator).
Internal test to confirm instance isolation by proving a DataType is strictly bound to its parent uCalc instance.
Internal Test: A custom `IIf` implementation using `ByExpr` to test lazy evaluation. The branches containing division by zero are never executed, preventing errors.
Internal Test: A variadic function that sums only the arguments matching a specific data type name, testing argument introspection capabilities.
Internal Test: An advanced example that adds logging to each transaction to trace the balance changes, showing how DSLs can be combined with custom functions.
