81 lines
2 KiB
MQL5
81 lines
2 KiB
MQL5
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//+------------------------------------------------------------------+
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//| ArraySwapSimple.mq5 |
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//| Copyright 2021, MetaQuotes Ltd. |
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//| https://www.mql5.com |
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//+------------------------------------------------------------------+
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#define PRT(A) Print(#A, "=", (A))
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//+------------------------------------------------------------------+
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//| Simple class for array processing |
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//+------------------------------------------------------------------+
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template<typename T>
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class Worker
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{
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T array[];
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public:
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Worker(T &source[])
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{
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// ArrayCopy(array, source); // overheads
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ArraySwap(source, array);
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}
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bool process(const int mode)
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{
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if(ArraySize(array) == 0) return false;
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switch(mode)
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{
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case -4:
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// TODO: shuffle
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break;
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case -3:
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// TODO: apply logarithmic scale
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break;
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case -2:
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// TODO: add gaussian noise to array
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break;
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case -1:
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ArrayReverse(array);
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break;
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// ...
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}
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return true;
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}
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T operator[](int i)
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{
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return array[i];
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}
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void get(T &result[])
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{
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ArraySwap(array, result);
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}
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};
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//+------------------------------------------------------------------+
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//| Script program start function |
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//+------------------------------------------------------------------+
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void OnStart()
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{
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double data[];
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ArrayResize(data, 3);
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data[0] = 1;
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data[1] = 2;
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data[2] = 3;
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PRT(ArraySize(data)); // 3
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Worker<double> simple(data);
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PRT(ArraySize(data)); // 0
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simple.process(-1);
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// can access elements by index
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// Print(simple[0]);
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double res[];
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simple.get(res);
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ArrayPrint(res); // 3.00000 2.00000 1.00000
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}
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//+------------------------------------------------------------------+
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