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Libraries

CHashArrayStringString - library for MetaTrader 5

Views:
3782
Rating:
(48)
Published:
2015.01.28 15:48
Updated:
2016.11.22 07:32
\MQL5\Scripts\ \MQL5\Include\
hasharray.mqh (5.08 KB) view
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An include file contains a set of classes demonstrating one of methods of organizing lines hash array with a string key.

An example of usage:

#include <HashArray.mqh>

void OnStart()
  {
   CHashArrayStringString Hash;
   Hash.Put("k1", "v1");
   Hash.Put("k2", "v2");

   Hash["k3"] = "v3";
   Hash["k2"] = "vv2";

   string t1 = Hash["k1"].value;
   string t2 = Hash["k2"].value;
   string t3 = Hash["k3"].value;

   Alert("k1=",t1);
   Alert("k2=",t2);
   Alert("k3=",t3);
  }


The result:


Performance test:

An include file contains a set of classes demonstrating one of methods of organizing lines hash array with a string key.

#include <HashArray.mqh>
void OnStart()
{
   CHashArrayStringString Hash();
   uint StartTime=GetTickCount();
   for(int n=0; n<10000; n++)
   {
      Hash["key"+IntegerToString(n)] = "trash";
   }
   uint timeTotal = GetTickCount() - StartTime;
   Alert("add 10k elements in ", IntegerToString(timeTotal), " ms");
   
}
add 10k elements in 31 ms

add 10k elements in 31 ms

Translated from Russian by MetaQuotes Ltd.
Original code: https://www.mql5.com/ru/code/7047

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