Why Clean Code?

Enterprise Software

It is not enough to learn a programming language. We have to develop enterprise software which are:

• Large: 100k – 1M lines

• Long life cycle (years)

• Complex

• Many developer

• Many modifications

• Iterative development

Problems

• Many bugs - potential bugs hiding in the code

• Code is too complex - hard to understand

• Code is fragile - changes causes new bugs, side effects

• Falling productivity - low development speed

• Unreliable, impossible estimations

• Too much Technical Debt collected

Technical Debt

• Invisible

• "Should have been done"

• "We will fix it later"

• Result of "quick & dirty" coding

• Poorly written code is a technical debt - "Should be written better"

The total cost of owning a mess. (Robert C. Martin)

Technical debt is the biggest risk of the development