Scala Programming for Big Data Analytics by Irfan Elahi;

Author:Irfan Elahi;
Language: eng
Format: epub
ISBN: 9781484248102
Publisher: Springer Nature

Using foreach on Lists

Now with this understanding of map, let’s look at foreach . It is pretty simple. It operates the same way as map in that you pass a function that you want to apply to each element of the list. The only caveat is that in foreach, the return type is Unit. It returns no value. Unlike with map, in which you get a list, albeit a changed one, with foreach, you don’t get a list in return.

Figure 9-8 illustrates this further.

Figure 9-8.Return type of foreach function on List

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