# Newbie question about arrays **URL:** \ **Category:** Ruby\ **Created:** [June 18, 2006, 1:11am UTC](https://www.ruby-forum.com/t/newbie-question-about-arrays/63716 "2006-06-18T01:11:23Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![Gautam\_D](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/g/4da419/32.png) [@Gautam\_D](https://www.ruby-forum.com/u/Gautam_D)\ **Post date:** [June 18, 2006, 1:11am UTC](https://www.ruby-forum.com/t/newbie-question-about-arrays/63716/1 "2006-06-18T01:11:23Z")
Hello all, So I was going through the Ruby array documentation and came across Array. abbrev(pattern = nil). However, every time I run the example code in irb I get the following: rb(main):001:0\> %w{ car cone }.abbrev NoMethodError: undefined method `abbrev’ for [“car”, “cone”]:Array from (irb):1 irb(main):002:0\> What am I doing wrong? Do I need to include a module? If so, how? Thank you, Gautam ---
**Author:** ![Gautam\_D](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/g/4da419/32.png) [@Gautam\_D](https://www.ruby-forum.com/u/Gautam_D)\ **Post date:** [June 18, 2006, 1:26am UTC](https://www.ruby-forum.com/t/newbie-question-about-arrays/63716/2 "2006-06-18T01:26:53Z")
On 6/18/06, Gautam D. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > irb(main):002:0\> > > What am I doing wrong? Do I need to include a module? If so, how? Nothing, the documentation is wrong, I used irb to check again irb(main):007:0\> Array.new.methods.sort =\> [“&”, “\*”, “+”, “-”, “\<\<”, “\<=\>”, “==”, “===”, “=~”, “[]”, “[]=”, “ **id** ”, “ **send** ”, “all?”, “any?”, “assoc”, “at”, “class”, “clear”, “clone”, “collect”, “collect!”, “compact”, “compact!”, “concat”, “delete”, “delete\_at”, “delete\_if”, “detect”, “display”, “dup”, “each”, “each\_index”, “each\_with\_index”, “empty?”, “entries”, “eql?”, “equal?”, “extend”, “fetch”, “fill”, “find”, “find\_all”, “first”, “flatten”, “flatten!”, “freeze”, “frozen?”, “grep”, “hash”, “id”, “include?”, “index”, “indexes”, “indices”, “inject”, “insert”, “inspect”, “instance\_eval”, “instance\_of?”, “instance\_variable\_get”, “instance\_variable\_set”, “instance\_variables”, “is\_a?”, “join”, “kind\_of?”, “last”, “length”, “map”, “map!”, “max”, “member?”, “method”, “methods”, “min”, “nil?”, “nitems”, “object\_id”, “pack”, “partition”, “pop”, “private\_methods”, “protected\_methods”, “public\_methods”, “push”, “rassoc”, “reject”, “reject!”, “replace”, “respond\_to?”, “reverse”, “reverse!”, “reverse\_each”, “rindex”, “select”, “send”, “shift”, “singleton\_methods”, “size”, “slice”, “slice!”, “sort”, “sort!”, “sort\_by”, “taint”, “tainted?”, “to\_a”, “to\_ary”, “to\_s”, “transpose”, “type”, “uniq”, “uniq!”, “unshift”, “untaint”, “values\_at”, “zip”, “|”] irb(main):008:0\> and there just is no abbrev method. However you are right with the module idea, quite impressive for a newbie require “abbrev” =\> true irb(main):002:0\> Array.new.methods.sort =\> [“&”, “\*”, “+”, “-”, “\<\<”, “\<=\>”, “==”, “===”, “=~”, “[]”, “[]=”, “ **id** ”, “ **send** ”, “abbrev”, “all?”, “any?”, “assoc”, “at”, “class”, “clear”, “clone”, “collect”, “collect!”, “compact”, “compact!”, “concat”, “delete”, “delete\_at”, “delete\_if”, “detect”, “display”, “dup”, “each”, “each\_index”, “each\_with\_index”, “empty?”, “entries”, “eql?”, “equal?”, “extend”, “fetch”, “fill”, “find”, “find\_all”, “first”, “flatten”, “flatten!”, “freeze”, “frozen?”, “grep”, “hash”, “id”, “include?”, “index”, “indexes”, “indices”, “inject”, “insert”, “inspect”, “instance\_eval”, “instance\_of?”, “instance\_variable\_get”, “instance\_variable\_set”, “instance\_variables”, “is\_a?”, “join”, “kind\_of?”, “last”, “length”, “map”, “map!”, “max”, “member?”, “method”, “methods”, “min”, “nil?”, “nitems”, “object\_id”, “pack”, “partition”, “pop”, “private\_methods”, “protected\_methods”, “public\_methods”, “push”, “rassoc”, “reject”, “reject!”, “replace”, “respond\_to?”, “reverse”, “reverse!”, “reverse\_each”, “rindex”, “select”, “send”, “shift”, “singleton\_methods”, “size”, “slice”, “slice!”, “sort”, “sort!”, “sort\_by”, “taint”, “tainted?”, “to\_a”, “to\_ary”, “to\_s”, “transpose”, “type”, “uniq”, “uniq!”, “unshift”, “untaint”, “values\_at”, “zip”, “|”] [“ala”, “ada”, “b”, “broad”, “crypt”].abbrev =\> {“ala”=\>“ala”, “al”=\>“ala”, “b”=\>“b”, “broa”=\>“broad”, “crypt”=\>“crypt”, “c”=\>“crypt”, “ad”=\>“ada”, “cr”=\>“crypt”, “br”=\>“broad”, “broad”=\>“broad”, “cryp”=\>“crypt”, “ada”=\>“ada”, “bro”=\>“broad”, “cry”=\>“crypt”} irb(main):004:0\> And you are set for the Ruby Q., good luck 😉 Robert > Thank you, > Gautam – Deux choses sont infinies : l’univers et la bêtise humaine ; en ce qui concerne l’univers, je n’en ai pas acquis la certitude absolue. - Albert Einstein ---
**Author:** ![Gautam\_D](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/g/4da419/32.png) [@Gautam\_D](https://www.ruby-forum.com/u/Gautam_D)\ **Post date:** [June 18, 2006, 2:00am UTC](https://www.ruby-forum.com/t/newbie-question-about-arrays/63716/3 "2006-06-18T02:00:08Z")
On 6/18/06, Robin S. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > > > > You need to require the abbrev module in order to use this functionality. > Would be nice to remove the abbrev entry in the core doc of Array, or > alternatively, indicate that this > is an extension of Array implemented in the abbrev file. > The doc is quite good, really, ty all for your work! > Robert Thanks, > Robin – Deux choses sont infinies : l’univers et la bêtise humaine ; en ce qui concerne l’univers, je n’en ai pas acquis la certitude absolue. - Albert Einstein ---
**Author:** ![Gautam\_D](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/g/4da419/32.png) [@Gautam\_D](https://www.ruby-forum.com/u/Gautam_D)\ **Post date:** [June 18, 2006, 1:32am UTC](https://www.ruby-forum.com/t/newbie-question-about-arrays/63716/4 "2006-06-18T01:32:59Z")
Gautam D. wrote: > What am I doing wrong? Do I need to include a module? If so, how? > Yes, you need to do require ‘abbrev’. It should be mentioned in the documentation, but it is not. I think Gavin S. is the one to contact in this case, so this mail is CC to him. Gavin, could you add a note to lib/abbrev.rb, something like: You need to require the abbrev module in order to use this functionality. Thanks, Robin ---
**Author:** ![Gautam\_D](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/g/4da419/32.png) [@Gautam\_D](https://www.ruby-forum.com/u/Gautam_D)\ **Post date:** [June 18, 2006, 4:51am UTC](https://www.ruby-forum.com/t/newbie-question-about-arrays/63716/5 "2006-06-18T04:51:48Z")
Robert, Thank you for you quick response. Gautam.