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Basic List - MetaTrader 5용 라이브러리
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- 2020.06.20 06:54
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/****************************************************************
BasicList
The List class template provides a basic container for storing an ordered list
of basic data type objects.
For convenience, List also provides synonyms for stack operations,
which make code that uses List for stacks more explicit without defining another class.
/**/
template<typename T>class BasicList { public: //construction, destruction, initialization, and assignment BasicList() {} BasicList(BasicList&src) {Copy(items,src.items);} ~BasicList() {} BasicList operator=(BasicList&); //accessing T operator[](int i) {return Get(i);} T Get(int at) {int c=Count(); if(c>0&&at>=0&&at<c) {return items[at];} return NULL;} T First() {int c=Count(); if(c>0) {return items[0];} return NULL;} T Last() {int c=Count(); if(c>0) {return items[c-1];} return NULL;} // int Count() {return ArraySize(items);} int Find(T item) {int c=Count(); for(int i=0; i<c; i++) {if(item==items[i]) {return i;}} return -1;} void Print() {int c=ArraySize(items); for(int i=0; i<c; i++) {PrintFormat("%d:%s",i,(string)items[i]);}} //adding void operator+=(T item) {Append(item);} void operator^=(T item) {Prepend(item);} void Append(T item) {int c=ArraySize(items); IncreaseAt(c); items[c]=item;} void Prepend(T item) {IncreaseAt(0); items[0]=item;} //removing void operator-=(T item) {Remove(item);} void operator~() {RemoveAll();} void Remove(T item) {int f=Find(item); if(f>-1) {ReduceAt(f);}} void RemoveLast() {ReduceAt(ArraySize(items)-1);} void RemoveFirst() {ReduceAt(0);} void RemoveAll() {ArrayFree(items);} //stack interface T Top() {return Last();} void Push(T item) {Append(item);} T Pop() {T top=Top(); RemoveLast(); return top;} protected: T items[]; //service void ReduceAt(int); void IncreaseAt(int); void Copy(T&dst[],T&src[]) {int c=ArraySize(src); ArrayResize(dst,c); for(int i=0; i<c; i++) {dst[i]=src[i];}} };
/****************************************************************
Mql does not allow to manipulate pointers and basic types in one template,
so one generic list with pointer control is impossible for all built-in types and user types.
This is why I made an independent template List for basic types.
Available operators:
[index] Get, eg. T var=list[3];
+= Append, eg. list+=var;
^= Prepend, eg. list^=var;
-= Remove, eg. list-=var;
~ RemoveAll, eg. ~list;
= Copy list, eg. T listA=listB; //A-new,B-existing
/**/
/**************************************************************** Example of BasicList usage /****************************************************************/ void OnStart() { BasicList<string>list; /**/ list+="worry"; //append list+="be happy"; //append list.Print(); //see output /**/ {string s; for(int i=0; i<10; i++) {s+="-";} Print(s);} /**/ list^="don't"; //remove BasicList<string>list2=list; //copy list list2.Print(); //see output /**/ {string s; for(int i=0; i<10; i++) {s+="-";} Print(s);} /**/ ~list; //clean list Print(list2.Pop()); //pop /**/ {string s; for(int i=0; i<10; i++) {s+="-";} Print(s);} /**/ list2.Print(); //see output } /**************************************************************** Output: /** 0:worry 1:be happy ---------- 0:don't 1:worry 2:be happy ---------- be happy ---------- 0:don't 1:worry /**/
Object List
A basic container for storing an ordered list of objects.
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