Scala trait or concrete class

Question

So I get what we can do with traits but in what cases should we prefer their use to a concrete class ? I was told to use traits everywhere I can and when I need to instanciate something use a regular class.

Edit : I am actually asking about when to use a trait insted of a concrete class not an abstract one

mfirry · Accepted Answer · 2017-02-16T20:51:06.080

1

As it's often the case, there is no single rule, but I personally found useful a general suggestion give in Odersky/Spoon/Venners book "Programming in Scala".

It says if the behaviour will not be reused in other unrelated classes, use a concrete class. On the other hand, if you think you'll reuse that behaviour somewhere else in unrelated places, make it a trait.

edited Feb 16 '17 at 20:51

answered Feb 16 '17 at 16:54

mfirry

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Thanks exactly what I wanted ! – blank_sam Feb 16 '17 at 17:16
Sorry, but an external link without at least a summary isn't ideal (in this case specifically I get a "viewing limit" message for that page). – Travis Brown Feb 16 '17 at 17:34
@TravisBrown I edited the question, mine was actually different and mfirry provided the exact answer to it. – blank_sam Feb 17 '17 at 09:06

Scala trait or concrete class

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