drop

static VALUE
enum_drop(VALUE obj, VALUE n)
{
    VALUE args[2];
    long len = NUM2LONG(n);

    if (len < 0) {
        rb_raise(rb_eArgError, "attempt to drop negative size");
    }

    args[1] = len;
    args[0] = rb_ary_new();
    rb_block_call(obj, id_each, 0, 0, drop_i, (VALUE)args);
    return args[0];
}