Weird syntax to sum matrix

[michel perez]

This syntax https://godoc.org/github.com/gonum/matrix/mat64#Dense.Add is so weird why there is not just a function that sums a and b and returns a new  matrix instead?

[Brendan Tracey]

The main reason is that an Add method has to exist. There are many reasons to store the result into an existing matrix, for example reducing memory allocations, or reducing the number of variable names, as in a.Add(a,b). The question is if an Add function is worth it on top of the add method. I don't think

var c mat64.Dense
c.Add(a,b)

is all that much more trouble than

c := mat64.Add(a,b)

Simplicity argues against providing both, especially since for consistency essentially every method would have to be duplicated.

[Dan Kortschak]

It makes allocation pressure reduction easier.

--
afk
Dan

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From: gonu...@googlegroups.com <gonu...@googlegroups.com> on behalf of michel perez <michel....@gmail.com>
Sent: Thursday, November 10, 2016 1:47:31 PM
To: gonum-dev
Subject: [gonum-dev] Weird syntax to sum matrix

 

This syntax https://godoc.org/github.com/gonum/matrix/mat64#Dense.Add is so weird why there is not just a function that sums a and b and returns a new  matrix instead?

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