Get a different result when calling the same function

Question

I am a scala newbie.

This is my code. The results of two types of same method use are different, can anyone explain to me why???

Answer 1

The thing is that in Scala, all functions ( or "operators") which have names ending with a colon ':' are deemed as right associative when used with infix notation.

So... for your function,

def ::(t: TG) = ???

When, you are writing

val lxx3 = lxx1 :: lxx2

The function :: associates to the right (ie. with lxx2 ). So it is actually equivalent to

val lxx3 = lxx2.::(lxx1)

instead of this,

val lxx3 = lxx1.::(lxx2)