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diff --git a/notes.md b/notes.md new file mode 100644 index 0000000..ed96992 --- /dev/null +++ b/notes.md @@ -0,0 +1,24 @@ +# misc. axioms of big O + +- Arithmetic operations are constant +- Variable assignment is constant +- Accessing element in an array (by index) or object (by key) is constant +- In a loop, the complexity is the length of the loop times the complexity of whatever happens inside of the loop + +# SOLID + +- Single responsibility principle + - a class should only have 1 reason to change + - *separation of concerns* -- different classes handling different, independent tasks/problems +- Open-closed principle + - classes should be open for extension but closed for modification +- Liskove substitution principle + - you should be able to substitute a base type of a subtype +- Interface segregation principle + - don't put too much into an interface; split into seperate interfaces +- Dependency inversion principle + - high-level modules should no depend on low-level ones; use abstraction + +# Builder + +A component that provides an API for constructing an object step-by-step, this saves you from having a gigantic constructor. \ No newline at end of file |