minmax_by()
public
Returns two elements array array containing the objects in enum
that gives the minimum and maximum values respectively from the given
block.
a = %w(albatross dog horse)
a.minmax_by {|x| x.length }
/*
* call-seq:
* enum.minmax_by {| obj| block } => [min, max]
*
* Returns two elements array array containing the objects in
* <i>enum</i> that gives the minimum and maximum values respectively
* from the given block.
*
* a = %w(albatross dog horse)
* a.minmax_by {|x| x.length } #=> ["dog", "albatross"]
*/
static VALUE
enum_minmax_by(obj)
VALUE obj;
{
VALUE memo[4];
RETURN_ENUMERATOR(obj, 0, 0);
memo[0] = Qundef;
memo[1] = Qundef;
memo[2] = Qnil;
memo[3] = Qnil;
rb_block_call(obj, id_each, 0, 0, minmax_by_i, (VALUE)memo);
return rb_assoc_new(memo[2], memo[3]);
}