# Is File.open deprecated? **URL:** \ **Category:** Ruby\ **Created:** [January 7, 2010, 1:30am UTC](https://www.ruby-forum.com/t/is-file-open-deprecated/181184 "2010-01-07T01:30:41Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![Xeno\_C](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/x/958977/32.png) [@Xeno\_C](https://www.ruby-forum.com/u/Xeno_C)\ **Post date:** [January 7, 2010, 1:30am UTC](https://www.ruby-forum.com/t/is-file-open-deprecated/181184/1 "2010-01-07T01:30:41Z")
I don’t see it mentioned in the File chapter of the latest Pickaxe book? Is this just a mistake? I would think it would be mentioned as deprecated otherwise…??? Apparently I use File.new instead, but it seems like File.open is worth leaving around…? ---
**Author:** ![Xeno\_C](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/x/958977/32.png) [@Xeno\_C](https://www.ruby-forum.com/u/Xeno_C)\ **Post date:** [January 7, 2010, 1:34am UTC](https://www.ruby-forum.com/t/is-file-open-deprecated/181184/2 "2010-01-07T01:34:11Z")
Xeno C. wrote: > I don’t see it mentioned in the File chapter of the latest Pickaxe > book? Is this just a mistake? I would think it would be mentioned as > deprecated otherwise…??? Apparently I use File.new instead, but it > seems like File.open is worth leaving around…? > It looks like the answer of my question is on page 162. Apparently it > still is > in use as a regular class method, and works a little differently from > “new”, and > just got left out of the main “File” method definitions. I am interested in any further comments on this that can reaffirm my sanity in this matter. xc ---
**Author:** ![Xeno\_C](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/x/958977/32.png) [@Xeno\_C](https://www.ruby-forum.com/u/Xeno_C)\ **Post date:** [January 7, 2010, 1:59am UTC](https://www.ruby-forum.com/t/is-file-open-deprecated/181184/3 "2010-01-07T01:59:57Z")
Rick DeNatale wrote: > No, it’s not on my page 549. I’ve got instance methods pid through putc on that page, and open nowhere to be found… Ah, wait, it’s a class method not an instance method: IT’s on Page 540 in this edition (Programming Ruby 1.9). xc ---
**Author:** ![Xeno\_C](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/x/958977/32.png) [@Xeno\_C](https://www.ruby-forum.com/u/Xeno_C)\ **Post date:** [January 7, 2010, 1:37am UTC](https://www.ruby-forum.com/t/is-file-open-deprecated/181184/4 "2010-01-07T01:37:42Z")
On Wed, Jan 6, 2010 at 7:30 PM, Xeno C. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > I don’t see it mentioned in the File chapter of the latest Pickaxe book? Is > this just a mistake? I would think it would be mentioned as deprecated > otherwise…??? Apparently I use File.new instead, but it seems like > File.open is worth leaving around…? It’s actually IO.open, and File which is a subclass of IO inherits it. It’s documented on page 549. – Rick DeNatale Blog: [http://talklikeaduck.denhaven2.com/](http://talklikeaduck.denhaven2.com/) Twitter: [http://twitter.com/RickDeNatale](http://twitter.com/RickDeNatale) WWR: [http://www.workingwithrails.com/person/9021-rick-denatale](http://www.workingwithrails.com/person/9021-rick-denatale) LinkedIn: [Rick DeNatale - Developer - IBM | LinkedIn](http://www.linkedin.com/in/rickdenatale) ---
**Author:** ![Xeno\_C](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/x/958977/32.png) [@Xeno\_C](https://www.ruby-forum.com/u/Xeno_C)\ **Post date:** [January 7, 2010, 3:38am UTC](https://www.ruby-forum.com/t/is-file-open-deprecated/181184/5 "2010-01-07T03:38:18Z")
It’s page 549 of the PDF version, my dead tree version is upstairs. On Wed, Jan 6, 2010 at 7:59 PM, Xeno C. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > > > > xc > > – > “It’s the preponderance, stupid!” - Professor Stephen Schneider, IPCC member – Rick DeNatale Blog: [http://talklikeaduck.denhaven2.com/](http://talklikeaduck.denhaven2.com/) Twitter: [http://twitter.com/RickDeNatale](http://twitter.com/RickDeNatale) WWR: [http://www.workingwithrails.com/person/9021-rick-denatale](http://www.workingwithrails.com/person/9021-rick-denatale) LinkedIn: [Rick DeNatale - Developer - IBM | LinkedIn](http://www.linkedin.com/in/rickdenatale)