CODEWITHSUNDEEP
scala
Dhrumil Shah
Dhrumil Shah

Reputation: 33

How could get Size of element in ArraySeq and also extract 1 by 1 element from it

I am new in scala. and I want to get below size of element from ArraySeq(Split by comma)

ArraySeq(A,B,C,D) // 4
ArraySeq(A,B,C)) // 3
ArraySeq(A,B)) //2
ArraySeq(A,B,C,D,E)) // 5

Also I would like to access each element from ArraySeq.

Does anyone can help me out of that?

Upvotes: 0

Views: 292

Answers (1)

AlexV
AlexV

Reputation: 449

You can use .size on any of the scala collections.

e.g. scala ArraySeq(A,B,C,D).size would return 4

There are a few ways to go about accessing the elements of the sequence

val example = ArraySeq(1,2,3,4,5)

// Using the apply method 
example(1) // Result 2
example(10) // ArrayIndexOutOfBoundsException is thrown

// Using .get to avoid exceptions
example.get(2) // Result Some(3)
example.get(10) // Result None

// You can transform all elements using map
example.map(_  * 2) // Result ArraySeq(2,4,6,8,10)

// Or do something with all elements
example.foreach(println) // prints 1,2,3,4,5 separated by newlines

If you have a nested ArraySeq (i,e, ArraySeq[ArraySet[T]]) you can get the total size using:

val exampleNested = ArraySeq(ArraySeq(1,2),ArraySeq(3,4,5), ArraySeq(6,7,8))

exampleNested.map(_.size).sum // Returns total size of 8

You can also flatten the nested collections to a single array seq for ease of use with

exampleNested.flatten // Result ArraySeq(1, 2, 3, 4, 5, 6, 7, 8)

Upvotes: 1

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