CODEWITHSUNDEEP
listerlangtuples
0xAX
0xAX

Reputation: 21817

Erlang list question

I have a list with tuples in Erlang for example:

[{1, "AAA"}, {2, "AAA"}, {3, "AAAAAAAA"}]

How can i get tuple from this list with max first element from this tuples?

Thank you.

Upvotes: 3

Views: 694

Answers (2)

Arjan
Arjan

Reputation: 21465

In this case lists:max/1 will return what you want. For this to work all tuples must have the same number of elements.

Upvotes: 5

D.Nibon
D.Nibon

Reputation: 2919

Use lists:keysort/2.

1> lists:keysort(1, [{1, "AAA"}, {2, "AAA"}, {3, "AAAAAAAA"}]).

Another thread

edit: Seems I read your questions to fast. If you only want one tuple containing a maximum value and your tuples are of same size Arjan should be the accepted answer.

If you only want one term() element containing a maximum value, and if the rule with similar tuple-sizes Arjan stated doesn't apply, I would go with either a lists:foldl/3 or own recursion function.

Sorting the whole list is unnecessary unless you want the whole list sorted. My mistake.

Upvotes: 3

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