Regarding calculating the size of list which is internally is a value of Map

Question

I have query I have a Map which consist of key and valuses will be of type list

Map<String, List<String>> ppvValidatedinfo = new Map<String, List<String>>

Now I am adding some data into the map initially

 1234 , 456987

but next time when data added to map it becomes like this

1234 , [456987,125789]

As shown above that 1234 is key and 456987,125789 are the values internally maintened in list and are the values of the map

Now my query is that I have to go in flow where list size increases more than 1 please advise how can i track the size of the list , I want to track the size of the list which is a value of map

`ppvValidatedinfo.get(1234).size()`? Also, do you want to use [`multimap`](http://stackoverflow.com/questions/3093863/how-to-create-a-multimapk-v-from-a-mapk-collection) — Karthik T, Jan 16 '13 at 06:35
@KarthikT The key is a String. `ppvValidatedinfo.get("1234").size()` — Sri Harsha Chilakapati, Jan 16 '13 at 06:43
@SriHarshaChilakapati ah yes ofcourse.. too late to fix though — Karthik T, Jan 16 '13 at 06:44

score 0 · Answer 1 · answered Jan 16 '13 at 07:01

Whenever you are doing insert, add a check after inserting to see if list size becomes greater than one. e.g.

public void add(String key,String value){
ppvValidatedinfo.get(key).add(value);
if(ppvValidatedinfo.get(key).size()>1){
//size is greater than 1 
doProcessing();
}
}

Regarding calculating the size of list which is internally is a value of Map

1 Answers1