1819SEM1 Question 3

[Zhiaowei99]

Summary

I have trouble using the stream method. I can't figure out why. Can anyone help me? :))

Description

Post the question that you would like your peers or seniors to answer.

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[ShyamalSankar]

Once you process the stream it is gone. Ie if you find the max you cannot use the stream again to find the minimum.

I suggest converting every element of the IntStream to an instance of the minMax class.
Like so: instream.map(x -> new MinMax(x,x)).reduce(lambda)

Inside your lambda you should extract the min of x and the min of y and compare them and get the minimum between the 2.
Do the same for the max and then create a new min max instance and return it. Hope this helps!

[eseutella]

Hello here's my attempt. I map each element in the stream to a new MinMax(element, element) and then I use reduce to get the maximum and minimum values. Hope this helps!

[Jeyxiang]

Hi you can only operate on the stream once. Meaning to say instream can only be used once, so after calling a terminal operation on a stream (max() in this case), you cannot use the same stream again. You can check out this link for a clearer explanation.

[Jjjetplane]

Streams can only be used once, once consumed if cannot be reused.

[seanangwj]

As what is already mentioned above, the stream has been operated on and to solve this question, you can try using reduce instead.

[markwty]

You can also consider using IntSummaryStatistics

and then retrieve the maximum and minimum.

[chooweixiang98]