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Getting an object’s methods without the inherited methods

test = SomeObject.new
test.methods - test.class.superclass.new.methods

Or is there a shorter, less convoluted way?

Update November 12th: yes there seems to be…

puts String.instance_methods(false)

From the Ruby For Rails Book, page 254, paragraph 9.8.1….

But: String.instance_methods(false).size = 83 , whereas (test.methods – test.class.superclass.new.methods).size = 102 (with test a string object).

>> puts (test.methods - test.class.superclass.new.methods - String.instance_methods(false)).sort
<
<=
>
>=
all?
any?
between?
collect
detect
each_with_index
entries
find
find_all
grep
inject
map
max
member?
min
partition
reject
select
sort
sort_by
zip
=> nil
>> exit

The difference seems to be the methods of the mixed in modules…

This entry was posted on Tuesday, November 7th, 2006 at 1:49 pm and is filed under Language. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.

One Response to “Getting an object’s methods without the inherited methods”

  1. Using Rails for Batch processes (example: Moneybird export via API and command-line) — Written along the rails Says:
    March 4th, 2011 at 7:58 am

    [...] ← Getting an object’s methods without the inherited methods [...]

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