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David Demelier wrote:

As we have already discussed this, some of us on the lists think that
math.isfloat is great but should also reflect the opposite as

Joseph Manning and I thought this idea great as you only need to
remember there are* to check the type. So you don't need to
think which one of the function is available.

This makes the library clear and adds a symmetry to the API.

However Thijs Schreijer also thougth about the functione type() that
should returns two values like this:

type(10) ->  "number", "integer"
type(10.0) ->  "number", "float"

What about math.type( 10 )   -> "integer"
           math.type( 10.0 ) -> "float"
           math.type( "foo" ) -> string

Or just return nil for not numbers..