dearCode
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Iterating through a list
I'm working with a craps play. One of the things that I have to do is to store each game of craps in a List<Integer> and then store all the games in List<List<Integer>>. How can I iterate through the list of lists of integers "List<List<Integer>>" to find how many times each of the numbers between 2 and 12 is repeated?
sameer_goyal
In my view, there's no easy of doing it. You will have to loop through the first level of list and fetch the List<Integer> and then loop through that and check if you can locate the desired numbers. Once you locate, set flags and counters to maintain the checks.
ASKER
Well I know that I could iterate through all the numbers using two for loops, but I'm confused about how to find how many of number 2 for example is in the List<List<Integer>> and display it and do the same with the other numbers "2-12". Help please!
What paltform or language are you using?
ASKER
Java
Not sure, but do you have Dictionary Collection in Java?
ASKER
What do you mean by dictionary collection?
You can use a generic collection like a Dictionary which allows Key-Value pair storage. In the inner loop, you can for each number like 2-12, make 2 as a key and the value can be a counter which you increase every time an occurence of the key is found. So at the end of the loop you will a colelction with Keys which are the numbers and subsequent count that were found in the List<List<Integer>>
i see that there is no Dictionary in Java. Sorry, I am a .NET developer primarily.
Instead, you have a 'Map' collection. You can use Map instead of Dictionary.
Instead, you have a 'Map' collection. You can use Map instead of Dictionary.
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ASKER
Thanks! That was very helpful.