Alex On > Recent Status Updates

Policy and level. The closer the code is to the input and output for example: console.log() or with nodejs process.stdin, process.stdout the lower the level.

Low level code should not change high level code. One way to seperate them is to use dependency inversion which involves using an interface to reverse the dependency.

Author talked about depency management, stability and abstractness of a component hierarchy.

A component that is 100% concrete and stable is very hard to work with as a volatile component.

A component that is 100% abstract and unstable is useless as a volatile component.

Some principles: SDP an ADP. SDP stands for Stable Dependencies Principle and ADP stands for Acyclic dependencies principle.

Some problems and solutions with Liskovs substitution principle and dependency inversion principle.

Some new design principles. SRP and OCP.

So far very interesting and easy to understand.

A clean architecture makes coding less expensive in large projects.