Code Issues for anonymous methods and lambda expressions
We already reviewed the refactorings for anonymous methods and lambda expressions and know how to deal with these language structures. Now its time to review what Code Issues for anonymous methods and lambda expressions CodeRush Pro provides.
Delegate can be replaced with lambda expression
Cause:
Lambda expressions are simply an improvement to the syntax of anonymous methods. This code issue suggests you that the anonymous method can replaced with a lambda expression.
Sample:
How to fix:
- If you prefer lambda expressions, you can convert an anonymous method to a lambda expression by executing the Compress to Lambda Expression code fix for this issue, which may improve code readability:
Resulting code:
ForEach Action can be called
Cause:
This code issue suggests that the code block of the List iteration can be converted to an anonymous method which can be passed as the Action delegate to the List.ForEach method. This may improve code readability.
Sample:
How to fix:
- Apple the Introduce ForEach Action code fix:
Resulting code:
Anonymous method cannot have ‘params’ parameter
Cause:
When the anonymous method contains a ‘params’ parameter, you will see an error in the code editor, because this is a violation of the programming language specification.
Sample:
How to fix:
- Remove the incorrect ‘params’ parameter:
Lambda expression cannot have ‘params’ parameter
Cause:
This is the same language specification violation as the previous code issue. You will see an error, because lambda expressions must have an unchanging number of parameters and cannot have a ‘params’ parameter.
Sample:
How to fix:
- Remove the incorrect ‘params’ parameter:
Lambda parameter has redundant type specification
Cause:
The type specifier to the lambda expression parameter is redundant and can be removed. Removing a redundant type specification may improve code readability.
Sample:
How to fix:
- Apply the Remove Redundant Type Specification refactoring:
