Introduction to Code Reviews
Because the design description helps you to code and documents each program components, your program reflects your interpretation of the design. The documentation explain in words and pictures what the program is supposed to be in the code. Thus it is helpful to ask an objective group of experts to review both your code and its documentation for misunderstandings, inconsistencies, and other faults. This process is known as code review and it is similar to the requirement and design reviews.
Code reviews are designed to detect defects that originate during the coding process, although they can also detect defects in detailed design. However it is unlikely that reviews will reveal errors in system design or requirements. For the code review a team is formed composed of the programmer and three or four other technical experts the team studies the program in an organized way to look for faults. The technical experts can be other programmers, designers technical writers or project supervisors but the code review team contains no one from the customer organization. Customer express requirements and approve the proposed design. They are interested in implementation only when we can demonstrate that the system as a whole works according to their description. Two types of code reviews are there:
Code Walk thoughts
Code Inspections
1. Code Walk Thoughts
In the code walk through one presents his code and accompanying documentation to the review team and the team comments on their correctness. During the walk through the discussion is held and time to time controlled. The atmosphere is informal and the focus of attention is on the code not the coder. Although supervisory personnel may be present, the walk through has no influence on your performance appraisal consistent with the general intent of testing finding faults but not necessary fixing them.
2. Code Inspections
A code inspection originally introduced by Fagan at IBM is similar to a walk through but is more formal. In an inspection, the review team checks the code and documentation against a prepared list of concerns. For example the team may examine the definition and use of data types and structures to see if their use is consistent with the design and with system standards and procedures. The team can review algorithms and computations for their correctness and efficiency. Comments can be compared wide code to ensure that they are accurate and complete. Similarly the interfaces among components can be checked for correctness.
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