Refinement & Refactoring

Successive Refinement

• Write a draft or "monolith" first

• Refine/refactor it

Coding Cycle

• Think

• Code

• Think again

• Optimize/refactor

Modifications

• Refactor first, write code after that

• Change the "pseudo code" first, the real code after that

• Refactor to isolate changed part

Refactoring

• Refactoring is good, technical debt is bad

• Refactoring is a mandatory part of the iterative development

• Continuously refactor unclean code to clean code

• Always refactor for changes in the requirements - "Until now the program had to do this, from now on the program has to do that"

Design Patterns

(Not part of this training. See links.)