Scala how to split all items in an array to another immutable array

Question

I have an input string

val x = "snapshot_year_month=201610,snapshot_day=05,source='zzz'"
val y = x.split(",")

This produces a 3 part array y. Now, I want to take each item in y and split it again by = and have the final output in Array[Array[String]. How would I do this? I tried the following but it did not work.

var finalSplit = y.foreach(z => z.split("="))

Variable size. @YuvalItzchakov I know I could create a mutable array, append to it over each iteration, but this seems like a poor approach. — test acc
– test acc, Commented Oct 17, 2018 at 14:46
.foreach returns a Unit. It doesn't return anything (at least, it doesn't return anything you can later manipulate). Use .map instead. — James Whiteley
– James Whiteley, Commented Oct 17, 2018 at 14:50

Yuval Itzchakov · Accepted Answer · 2018-10-17 14:52:07Z

2

You need to use .map instead of .foreach. The latter returns Unit, which is meant to execute a side effect and not return any value:

val data = "snapshot_year_month=201610,snapshot_day=05,source='zzz'"
val splitData = x.split(",")

val finalRes: Array[Array[String]] = splitData.map(_.split("="))

edited Oct 17, 2018 at 14:52

answered Oct 17, 2018 at 14:46

Yuval Itzchakov

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