Please use code tags!

The code you are showing is calculating the sum of products of the x y and z component of two vectors a and b.

The arrows have the highest precedence in this calculation, then the multiplication and last the addition.

See "algebraic definition" in http://en.wikipedia.org/wiki/Dot_product for mathematical background.

a1 is $a->X and so on. ..

Cheers Rolf
(addicted to the Perl Programming Language and ☆☆☆☆ :)
Je suis Charlie! </""sub>

In reply to Re: about the application of arrow operator by LanX
in thread about the application of arrow operator by windcrazy86

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