rb_ary_delete_at 2067 array.c            return rb_ary_delete_at(ary, NUM2LONG(pos));
rb_ary_delete_at 2131 array.c            return rb_ary_delete_at(ary, NUM2LONG(arg1));
rb_ary_delete_at 7599 ext/win32ole/win32ole.c         rb_ary_delete_at(ary, at);
rb_ary_delete_at   67 include/ruby/intern.h VALUE rb_ary_delete_at(VALUE, long);