Why is there a seperate Math class?

ruby-talk
1

> In addition to the answers by others, what would you do for those

math

> functions whose arity isn't 1?
>
> Math.methods(false).select{ |n| Math.method(n).arity != 1 }
> #=> ["hypot", "atan2", "ldexp"]
>
> All three take two arguments. While 3.hypot(4) *might* make
> sense--given one leg of a right triangle, how long is the hypotenuse

to

> a given other leg--30.atan2( 40 ) makes little sense to me.

hypot and atan are vector methods, so [30, 40].atan2, [3,4].hypot
would be correct in the OO-sense, much like #max and #min are in Array
and not Math (compare to e.g. JavaScript where there is Math.max and
Math.min)

Good argument. In fact, one of them is there already:
  require 'matrix'
  Vector[3,4].r #=> 5.0

···

From: Ilmari Heikkinen [mailto:ilmari.heikkinen@gmail.com]

On 1/9/07, Phrogz <gavin@refinery.com> wrote:

2

Good argument. In fact, one of them is there already:
  require 'matrix'
  Vector[3,4].r #=> 5.0

Gavin -

Just wanted to point out to you that each of your replies is creating a
new thread. You might want to reply with the same subject to avoid this.
Just thought you'd like to know.

-Drew

···

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