Tech Interview – Recursive Tree Traversal

One of the improvements we need to make on the Like Statistic application is to change the structure of the database where the datafiles are stored. The database is a directory with datafiles, and the program reads all datafiles from that given directory from a single level, but doesn’t read those from the subdirectories. In […]

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Expression Tree Based Activators

In the previous part, in the convention based factory, we used the Activator class CreateInstance() method to create a parser dynamically using a type information. This solution works well in our example, but there is a faster way to create class instances than using Activator.

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Tech Interview – Refactoring V – Convention Based Factory

In the previous part we fixed the code which reads the Person instances from the datafiles. A part of this code was a Factory class based on a switch statement. This solution is ok, but when we add a new parser, we need to remember to add a new case block to the switch statement. […]

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Tech Interview – Refactoring IV – SOLID Refactor

In this part we are going to refactor the parsers and the factory method more, utilizing design patterns and the SOLID principles.

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Tech Interview – Refactoring III – Simple Refactor

In the previous part we looked over the MainWindow class and found some improvement points. Those were common mistakes with simple fix. We skipped a big switch block, because it needed more work, and today we are going to refactor that part. We will not refactor it to its final form, though, first, we just make it better. In a second blog post, we will improve the code more.

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Tech Interview – Refactoring II – Code Smells

In this part we are going to take a look at the source code and try to answer the question that usually sounds like “what problems can you see at first look” or “what do you dislike when you look at this code” or “how would you change the code to make it better”.

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Tech Interview – Refactoring I

In this series we are going to solve a programming test which was designed for interviews to see how a candidate can solve practical problems. During the test, we need to refactor and improve a small application.

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