method

minmax

v1_8_7_72 - Show latest stable - 0 notes - Class: Enumerable

minmax() public

Returns two elements array which contains the minimum and the maximum value in the enumerable. The first form assumes all objects implement Comparable; the second uses the block to return a <=> b.

   a = %w(albatross dog horse)
   a.minmax                                  #=> ["albatross", "horse"]
   a.minmax {|a,b| a.length <=> b.length }   #=> ["dog", "albatross"]

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/*
 *  call-seq:
 *     enum.minmax                   => [min,max]
 *     enum.minmax {|a,b| block }    => [min,max]
 *
 *  Returns two elements array which contains the minimum and the
 *  maximum value in the enumerable.  The first form assumes all
 *  objects implement <code>Comparable</code>; the second uses the
 *  block to return <em>a <=> b</em>.
 *
 *     a = %w(albatross dog horse)
 *     a.minmax                                  #=> ["albatross", "horse"]
 *     a.minmax {|a,b| a.length <=> b.length }   #=> ["dog", "albatross"]
 */

static VALUE
enum_minmax(obj)
    VALUE obj;
{
    VALUE result[3];
    VALUE ary = rb_ary_new3(2, Qnil, Qnil);

    result[0] = Qundef;
    if (rb_block_given_p()) {
        result[2] = ary;
        rb_block_call(obj, id_each, 0, 0, minmax_ii, (VALUE)result);
    }
    else {
        rb_block_call(obj, id_each, 0, 0, minmax_i, (VALUE)result);
    }
    if (result[0] != Qundef) {
        RARRAY(ary)->ptr[0] = result[0];
        RARRAY(ary)->ptr[1] = result[1];
    }
    return ary;
}

minmax

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