Duplicates on apex function call with apex repeat

Question

I have a below apex function call

<apex:actionFunction name="searchContinueAvailableSlotJS" action="{!searchnextSevenSlots}" status="searchOpenSlots" onComplete="Appointment.onContinuationComplete()" rerender="confirmMsgPanel,nextSevenDaysId"/>

On Above call I rerender the components with id nextsevendays. Now this component has a apex:repeat which has a Map in it and that map gets updated on every apex function call. and I recurrsively calling the apex function 4 times like below from a javascript function

function1 () {
if(counter < 4){
searchContinueAvailableSlotJS();
}
}

Now this creates duplicate values on the UI as below. After first call say Map has value1 After second call map has value1 , value 2 so on UI it displays duplicate values Value 1 Value 1 Value 2 Value 1 Value 2 Value 3 ..... and so on. Can someone suggest a way to overcome this problem.Thanks

Answer 1

I think for each counter you are adding values in the map. Here I am thinking it is not simple as Value 1, Value 2....kind of simple values, rather it may have list of values.

So, let's say you are passing values in lstString, for each iteration it may be specific set of values (e.g. Value 1 on first iteration, Value 2 in 2nd iteration.

//first call
List<String> lstString = new List<String>();
lstString.add('Value 1');

//hold value values in the map
Map<String, List<String>> myMap = new Map<String, List<String>>();

//loop through list of values before putting into map, let's say you want to put 'Value 1' in the map
for(String outerStr:lstString)
{
    for(String str:myMap.keySet())  //compare with the key
    {
        List<String> lstInternalString = myMap.get(str); //get list of values already exist in the map
        String str2 = String.join(lstInternalString,','); //create a string with comma delimited way.
        if(!str2.contains(outerStr))                    //check 'Value 1' exists in the map.
        {
            //add value to the map
            myMap.put(str, lstInternalString.add(outerStr));
        }
    }
}