singleton-pattern 23 observer-pattern 23 factory-pattern 23 facade-pattern 23 design-patterns 23 adapter-pattern 23 builder-pattern 23 decorator-pattern 22 visitor-pattern 22 strategy-pattern 21 state-pattern 21 proxy-pattern 21 prototype-pattern 21 memento-pattern 21 mediator-pattern 21 abstract-factory-pattern 21 design-pattern 21 composite-pattern 21 bridge-pattern 21 golang 5 tree 2 stack 2 set 2 queue 2 map 2 list 2 iterator 2 iterables 2 iterable 2 go 2 generics 2 generic 2 datastructures 2 data-structures 2 design 1 object-oriented-programming 1