Finding array with empty elements

Question

I have the following structure:

val s1 = Seq(1,2,3,4,5)
val s2 = Seq()
val s3 = Seq(6,7,8,9)
val seq = Seq(s1,s2,s3)

What I need is to validate that all the sequences in seq have at least one element. I tried to accomplish this with filter, but couldn't, any ideas?

Xavier Guihot · Accepted Answer · 2018-04-13 19:19:46Z

1

You're probably looking for the forall function:

seq.forall(!_.isEmpty)

which translates into: Are all sequences in seq non-empty? and thus returns false with your example since s2 is empty.

answered Apr 13, 2018 at 19:19

Xavier Guihot

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Jeffrey Chung Over a year ago

Or seq.forall(_.nonEmpty).

Manoj Kumar Dhakad · Accepted Answer · 2018-04-13 19:15:16Z

1

You can use below line of code.

val distinct=seq.filter(_.length>0)

answered Apr 13, 2018 at 19:15

Manoj Kumar Dhakad

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Comments

Gabriele Petronella · Accepted Answer · 2018-04-13 20:41:29Z

1

This finds all the sequences with at least one element

seq.filterNot(_.isEmpty)

while this checks that all sequences have at least one element

seq.forAll(!_.isEmpty)

or

!seq.exists(_.isEmpty)

edited Apr 13, 2018 at 20:41

answered Apr 13, 2018 at 19:08

Gabriele Petronella

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Raman Mishra · Accepted Answer · 2018-04-13 20:18:34Z

0

This should also work.

seq.filter(_.nonEmpty)

answered Apr 13, 2018 at 20:18

Raman Mishra

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