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Typesafe Go Data Structure with generics, rich interfaces, functional transformation, and more...

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cuzfrog/tgods

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Typesafe Go Data Structures

Your brand-new Golang collections implementation with generics.Go version >=1.18. If facing compiler issue, please upgrade to1.19.

go get github.com/cuzfrog/tgods@<version>

Interfaces

Implementation\InterfaceStackListQueueDequeSetMapMultiMapGraph
arrayStack✔️
circularArray✔️✔️✔️✔️
linkedList✔️✔️✔️✔️
binaryHeap✔️
rbTree✔️✔️
hashTable✔️✔️
linkedHashTable✔️✔️
enumMap✔️
enumSet✔️
multiMap✔️✔️
treeAdjacencyList✔️

Top interfaceCollection contains general methods, sub-interfaces likeArrayList,SortedSet,SortedMap provide more rich functionalities.All interface definitions can be found:here

Data Structures:

  • arrayStack - fixed length first-in-last-out array based stack. Backing upStack
  • circularArray - variable length/cap array with fast add/remove at head or tail and random access with index. Backing upStack,ArrayList,Queue,Deque
  • linkedList - doubly linked list with fast add/remove. Backing upStack,LinkedList,Queue,Deque
  • binaryHeap - binary heap based min or max priority queue. Backing upQueue
  • rbTree - recursion-free red black tree implementation. Backing upSortedSet,SortedMap
  • hashTable - variable length/cap array based hash table, hash collision is handled by linked nodes. Backing upSet,Map
  • linkedHashTable hashTable preserving inserting or configurable access order. Can serve as anLRU cache. Backing upLinkedSet,LinkedMap
  • enumMap &enumSet fast array based map and set withInteger as the key. ImplementingSortedMap,SortedSet respectively.
  • multiMap multimap implementation witharrayListMultiMap andhashSetMultiMap constructors.
  • treeAdjacencyList a treeMap based graph implementation with directional edge properties.It has typicalO(log(n)) time complexity for adding, searching, and removing vertices. Backing upGraph

Usage:

Rich Constructors:

import"github.com/cuzfrog/tgods/collections"list:=collections.NewLinkedListOf(1,2,3)// List[int]list:=collections.NewArrayListOf(1,2,3)// List[int]queue:=collections.NewLinkedListQueue[int]()// Queue[int]queue:=collections.NewArrayListQueue[int]()// Queue[int]hashMap:=collections.NewHashMapOf[string,int](funcs.NewStrHash(),funcs.ValueEqual[string])// Map[string, int]hashMap:=collections.NewHashMapOfStrKey[int](EntryOf("Earth",3),EntryOf("Mars",4))// Map[string, int]cache:=collections.NewLRUCacheOfStrKey[int](40,collections.PutOrder+collections.GetOrder)// LRU cache[string, int] of size limit 40// more...

Client implementation ofconstraint interfaces to simplify collection creation:

typemyStructstruct {...}func (s*myStruct)Hash()uint {...}func (s*myStruct)Equal(other*myStruct)bool {...}hashSet:=collections.NewHashSetC[*myStruct]()

Functional Transformation

import"github.com/cuzfrog/tgods/transform"c:=collections.NewArrayListOf(1,3,4)l:=collections.NewLinkedListOf[string]()transform.MapTo[int,string](c,l,func(elemint)string {returnfmt.Sprint(elem) })// l ["1", "2", "3"]listOfList:=...// List[List[int]] [[1, 3], [2, 4]]list:=NewArrayListOf[int]()transform.FlattenTo[types.List[int],int](listOfList,list)// list [1, 3, 2, 4]c:=collections.NewArrayListOf(1,3,4)transform.Reduce[int,string](c,"",func(accstring,nextint)string {returnacc+strconv.Itoa(next) })// "134"c:= []int{1,3,4}transform.CountSlice[int](c,func(elemint)bool {returnelem>2})// 2, yeah for slices, also has Count for Collection// more...

Built-in Utils & Functions:

import"github.com/cuzfrog/tgods/utils"list:=collections.NewArrayListOf(1,3,2)// ArrayList 1, 3, 2list.Sort(funcs.ValueLess[int])// ArrayList 1, 2, 3utils.StringFrom(list)// [1, 2, 3]utils.SliceFrom(list)// []int{1, 2, 3}m:=// Map [1->"a", 2->"b"]utils.KeysFrom(m)// [1, 2]// functions:import"github.com/cuzfrog/tgods/funcs"funcs.NewStrHash()// func(s string) uint, create a string hash function based on 64bit or 32bit platformfuncs.ValueEqual// (a, b comparable) bool// HOFs:funcs.CompToEq// func(comp Compare[T]) Equal[T]funcs.InverseComp// func(comp Compare[T]) Compare[T]// more...

Semantic Iteration:

Iteration behavior is based on which interface type is constructed.

list:=collections.NewLinkedListOf[int]()// interface List[int], implementation linkedList[int]list.Add(1)list.Add(2)list.Add(3)list.Each(func (i,vint) {fmt.Print(v)})// 123stack:=collections.NewLinkedListStack[int]()// interface Stack[int], implementation linkedList[int]stack.Push(1)stack.Push(2)stack.Push(3)stack.Each(func (i,vint) {fmt.Print(v)})// 321

Development

Run test:

go test --tags=test ./...

Author

Cause Chung(cuzfrog@gmail.com)

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