Array Sort ((String Values)) MQL5

[Ahmed Mohamed Abd Elfattah Alesawy]

 >>> can you help me please ?

I can not find the equivalent in MQL5 doing sort for ((( string values ))) .... this my code in MQL4 and ArraySort works OK in string values

string x[];
ArrayResize(x,OrdersTotal()+1);
for(int i=0;i<OrdersTotal();i++)
      {
         if(OrderSelect(i,SELECT_BY_POS,MODE_TRADES)==true)
         {
            x[i]=OrderSymbol();
         }
      }
ArraySort(x,WHOLE_ARRAY,0,MODE_ASCEND); // I can not find the equivalent in MQL5 work on string values

[Enrique Dangeroux]

Egyptian.Smart:

 >>> can you help me please ?

I can not find the equivalent in MQL5 doing sort for ((( string values ))) .... this my code in MQL4 and ArraySort works OK in string values

https://www.mql5.com/en/docs/array/arraysort

It can not sort based on string according to the docs. 

Maybe this https://www.mql5.com/en/articles/1334 can help you to give Arrays more functionality found in other programming languages.

[Ahmed Mohamed Abd Elfattah Alesawy]

Egyptian.Smart:

 >>> can you help me please ?

I can not find the equivalent in MQL5 doing sort for ((( string values ))) .... this my code in MQL4 and ArraySort works OK in string values

I solve My Problem by working with ArrayString.mqh file

#include <Arrays\ArrayString.mqh> // put this line at the begin of code after #property lines

void OnTick()
{
      CArrayString *array=new CArrayString; // put this line at the begin of OnTick() or at the begin of OnStart()
.
.
.
      string x[];
      for(int i=0;i<PositionsTotal();i++)
      {
         PositionGetTicket(i);
         array.Insert(PositionGetString(POSITION_SYMBOL),i);
      }
      array.Sort(0);
      for(int i=0;i<PositionsTotal();i++)
      {
         x[i]=array.At(i);
      }

[William Roeder]

See pass generic class data field - Swing Trades - MQL4 and MetaTrader 4 - MQL4 programming forum № 2/3

[Enrique Dangeroux]

Egyptian.Smart:

I solve My Problem by working with ArrayString.mqh file

Glad you solved your problem and posted the solution. Thanks!

[Ahmed Mohamed Abd Elfattah Alesawy]

Enrique Dangeroux:

https://www.mql5.com/en/docs/array/arraysort

It can not sort based on string according to the docs. 

Maybe this https://www.mql5.com/en/articles/1334 can help you to give Arrays more functionality found in other programming languages.

Thanks for your response ... I found the solution ... and i put it in comments

[nicholish en]

Egyptian.Smart:

I solve My Problem by working with ArrayString.mqh file

Hi, just a couple of tips when working with the standard library collections... See comments in code.

void OnStart()
{
   //CArrayString *array=new CArrayString; // put this line at the begin of OnTick() or at the begin of OnStart()
   CArrayString array; //Better to statically instantiate so you don't have to remember to delete. 
   string x[]; //You already have a string array object... no point in having two... but leaving it here for demonstration
   for(int i=0;i<PositionsTotal();i++)
   {
      PositionGetTicket(i);
      //array.Insert(PositionGetString(POSITION_SYMBOL),i);
      //Add is safer and quicker. Only use insert when you have to specify the index
      array.Add(PositionGetString(POSITION_SYMBOL));    
   }
   //array.Sort(0);
   array.Sort();
   ArrayResize(x,array.Total());
   //for(int i=0;i<PositionsTotal();i++)
   for(int i=0;i<array.Total();i++)
   {
      //x[i]=array.At(i);
      // use the overloaded operator instead      x[i]=array[i];
   }
}

[Alain Verleyen]

Egyptian.Smart:

I solve My Problem by working with ArrayString.mqh file

There are a lot of ways to code inefficiently. If you are just happy it's working no problem for me, but putting all these strings in an array to sort it, is really time consuming.

May I ask you why you need to sort symbols used on every position ?

[Cristof Ensslin]

Ahmed Alesawy:

I solve My Problem by working with ArrayString.mqh file

Thanks, this helped me a ton!

[Cristof Ensslin]

nicholi shen:

Hi, just a couple of tips when working with the standard library collections... See comments in code.

These tips worked like gold for me, thank you!