Any way to ask an Enumerator what the underlying object it is
enumerating for is? Eg.
e = Enumerator.new([1,2,3], :each)
e.some_method #=> [1,2,3]
Not as far as I know,
but this patch could do it if you really need it
— enumerator.c 2009-04-19 15:33:31.000000000 +0200
+++ enumerator-with-obj-access.c 2009-07-18 18:02:33.000000000
+0200
@@ -537,6 +537,12 @@
return v;
}
+static VALUE
+enumerator_get_object( VALUE obj )
+{
-
return enumerator_ptr( obj )->obj;
+}
+
/*
- call-seq:
- e.rewind => e
@@ -788,6 +794,7 @@
rb_define_method(rb_cEnumerator, “initialize”,
enumerator_initialize, -1);
rb_define_method(rb_cEnumerator, “initialize_copy”,
enumerator_init_copy, 1);
rb_define_method(rb_cEnumerator, “each”, enumerator_each, 0);
- rb_define_method(rb_cEnumerator, “get_object”,
enumerator_get_object, 0);
rb_define_method(rb_cEnumerator, “each_with_index”,
enumerator_with_index, 0);
rb_define_method(rb_cEnumerator, “each_with_object”,
enumerator_with_object, 1);
rb_define_method(rb_cEnumerator, “with_index”,
enumerator_with_index, 0);
please note that
2.times.get_object will give you 2 and not [0, 1] which 2.times.to_a
would give you.
Cheers
Robert
On 7/18/09, Intransition [email protected] wrote:
Any way to ask an Enumerator what the underlying object it is
enumerating for is? Eg.e = Enumerator.new([1,2,3], :each)
e.some_method #=> [1,2,3]
–
Toutes les grandes personnes ont d’abord été des enfants, mais peu
d’entre elles s’en souviennent.
All adults have been children first, but not many remember.
[Antoine de Saint-Exupéry]
but this patch could do it if you really need it
Is this functionality…useful enough to merit being submitted to core?
On 7/18/09, Roger P. [email protected] wrote:
but this patch could do it if you really need it
Is this functionality…useful enough to merit being submitted to core?
I do not think so, I was in a strange mood and as there is no other
way…
I suspect that enumerator hides its obj by designed.
But of course this patch is in the public domain now.
Cheers
Robert
–
Toutes les grandes personnes ont d’abord été des enfants, mais peu
d’entre elles s’en souviennent.
All adults have been children first, but not many remember.
[Antoine de Saint-Exupéry]