The art of writing small and plain functions



The art of writing small and plain functions

The complexity of software applications is growing. The code quality is important in order to make the application stable and easily extensible.

Unfortunately almost every developer, including myself, in his career faced with bad quality code. And it's a swamp.
Such code has the following harmful characteristics:

  • Functions are too long and do too many things
  • Often functions have side effects that are difficult to understand or even debug
  • Unclear naming of functions and variables
  • Fragile code: a small modification unexpectedly breaks other application components
  • Poor or missing code coverage


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