On Sun, 24 Nov 2002, Jim Freeze wrote:

>   return rb_num_coerce_bin(x, y);
> What does the _bin stand for and what does this function do?

Quick check from the source makes it seem like it acts just like
Numeric.coerce:

$ ri coerce
--------------------------------------------------------- Numeric#coerce
     num.coerce( aNumeric ) -> anArray
------------------------------------------------------------------------
     If aNumeric is the same type as num, returns an array containing
     aNumeric and num. Otherwise, returns an array with both aNumeric
     and num represented as Float objects.

The _bin propably refers to the fact that the function takes two arguments.

  -- Nikodemus