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**Category:** Ruby\
**Created:** [May 22, 2009, 11:17am UTC](https://www.ruby-forum.com/t/htmldiff-for-jruby-and-ruby/168556 "2009-05-22T11:17:42Z")\
**Posts on this page:** 6\
**Page:** 1
**Author:**  [@virendra](https://www.ruby-forum.com/u/virendra)\
**Post date:** [May 22, 2009, 11:17am UTC](https://www.ruby-forum.com/t/htmldiff-for-jruby-and-ruby/168556/1 "2009-05-22T11:17:42Z")
hello there
from past few days iam trying to find out a gem that can compare the
difference between two html file. i have tried to install
myobie-htmldiff gem but the install didnt work out properly an it gave
me error
ERROR: could not find gem myobie-htmldiff locally or in a repository
Note:- i have followed all the steps that were mention in the github
myobie-htmldiff home page
i have also tried gem xhtmldiff but its seem to give me weird error
while taking the difference between the two html file
like
when i tried this
XHTMLDiff.diff(first\_file,second\_file)
ArgumentError: both arguments must be equal or both be elements. a is
String and b is String
i wish somebody out there can help me out
Thank anyway
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**Author:**  [@virendra](https://www.ruby-forum.com/u/virendra)\
**Post date:** [May 22, 2009, 12:01pm UTC](https://www.ruby-forum.com/t/htmldiff-for-jruby-and-ruby/168556/2 "2009-05-22T12:01:23Z")
Virendra N. wrote:
> from past few days iam trying to find out a gem that can compare the
> difference between two html file. i have tried to install
> myobie-htmldiff gem but the install didnt work out properly an it gave
> me error
> ERROR: could not find gem myobie-htmldiff locally or in a repository
Looks like github hasn’t built the gem. There was a bug which was
recently fixed which was preventing gems being built. You can ask the
author to bump the gem version to force a rebuild, or you can build and
install the gem yourself:
git clone git://github.com/myobie/htmldiff.git
cd htmldiff
gem build htmldiff.gemspec
sudo gem install htmldiff-0.0.1.gem
If you don’t have git available, then instead of ‘git clone’ just
download a tar or zip of the project (click the ‘download’ link on the
github page)
---
**Author:**  [@virendra](https://www.ruby-forum.com/u/virendra)\
**Post date:** [May 22, 2009, 12:25pm UTC](https://www.ruby-forum.com/t/htmldiff-for-jruby-and-ruby/168556/3 "2009-05-22T12:25:48Z")
Brian C. wrote:
> Virendra N. wrote:
>
> > from past few days iam trying to find out a gem that can compare the
> > difference between two html file. i have tried to install
> > myobie-htmldiff gem but the install didnt work out properly an it gave
> > me error
> > ERROR: could not find gem myobie-htmldiff locally or in a repository
>
> Looks like github hasn’t built the gem. There was a bug which was
> recently fixed which was preventing gems being built. You can ask the
> author to bump the gem version to force a rebuild, or you can build and
> install the gem yourself:
>
> git clone git://github.com/myobie/htmldiff.git
> cd htmldiff
> gem build htmldiff.gemspec
> sudo gem install htmldiff-0.0.1.gem
>
> If you don’t have git available, then instead of ‘git clone’ just
> download a tar or zip of the project (click the ‘download’ link on the
> github page)
i followed your step but when iam trying to do require “htmldiff” its
give me error like that says
’ LoadError: no such file to load – htmldiff’
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**Author:**  [@virendra](https://www.ruby-forum.com/u/virendra)\
**Post date:** [May 22, 2009, 5:09pm UTC](https://www.ruby-forum.com/t/htmldiff-for-jruby-and-ruby/168556/4 "2009-05-22T17:09:22Z")
On Fri, May 22, 2009 at 8:02 PM, Pieter V. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote:
> This might seem oddly self-serving, but you might look into the Differ gem.
>
> [GitHub - pvande/differ: A simple gem for generating string diffs](http://github.com/pvande/differ)
>
> While not designed to diff HTML specifically, that’s something that it
> could most probably be set up to do. Consider giving it a try.
That’s a string differ. A proper html differ needs to be aware of the
tree structure - it’s a different problem.
martin
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**Author:**  [@virendra](https://www.ruby-forum.com/u/virendra)\
**Post date:** [May 22, 2009, 4:33pm UTC](https://www.ruby-forum.com/t/htmldiff-for-jruby-and-ruby/168556/5 "2009-05-22T16:33:03Z")
This might seem oddly self-serving, but you might look into the Differ
gem.
> **[GitHub - pvande/differ: A simple gem for generating string diffs](https://github.com/pvande/differ)**
>
> A simple gem for generating string diffs. Contribute to pvande/differ development by creating an account on GitHub.
While not designed to diff HTML specifically, that’s something that it
could most probably be set up to do. Consider giving it a try.
(Full disclosure: Yeah, it’s mine.)
On Fri, May 22, 2009 at 3:25 AM, Virendra N.
---
**Author:**  [@virendra](https://www.ruby-forum.com/u/virendra)\
**Post date:** [May 22, 2009, 5:32pm UTC](https://www.ruby-forum.com/t/htmldiff-for-jruby-and-ruby/168556/6 "2009-05-22T17:32:17Z")
Pardon my confusion; htmldiff appears to be a string differ (with HTML
output) as well.