Assuming the quotes are correctly balanced and there are no escaped quotes, then it’s easy: result = subject.gsub(/a(?=(?:[^”]*”[^”]*”)*[^”]*\Z)/, ”) This replaces all the as with the empty string if and only if there is an even number of quotes ahead of the matched a. Explanation: a # Match a (?= # only if it’s followed … Read more
The specific version of mysql2 gem you’re trying to install (0.2.4) not only lacks binaries for Windows, but have issues on Windows. Please install mysql2 gem without indicating the version: gem install mysql2 Which will install latest version (0.2.6 at the time of my posting this) and also provides binaries for Windows which skip the … Read more
While IronRuby will make short work of talking to your .NET dll (it’ll be literally no code at all), it was abandoned by microsoft, and it never got a large enough open source community to keep it going after that event. I wouldn’t recommend it these days Regarding the COM solution, this may actually be … Read more
require MyEngine::Engine.root.join(‘app’, ‘models’, ‘my_engine’, ‘my_model’) before the model class definition in your application.
I just installed RMagick 2.13.1 successfully on Windows with Ruby v1.9.x ! Let me spill out the procedure, before I forget. Install DevKit : https://github.com/oneclick/rubyinstaller/wiki/Development-Kit . Install ImageMagick 6.6.x with windows installer with headers. NOTE: -Do not install ImageMagick in a path which has spaces in it. The default path C:/Program Files/… will not work. … Read more
Use: (//h2[. = ‘Foo bar’])[1]/following-sibling::p [1 = count(preceding-sibling::h2[1] | (//h2[. = ‘Foo bar’])[1])] In case it is guaranteed that every h2 has a distinct value, this may be simplified to: //h2[. = ‘Foo bar’]/following-sibling::p [1 = count(preceding-sibling::h2[1] | ../h2[. = ‘Foo bar’])] This means: Select all p elements that are following siblings of the h2 … Read more
The use of << to indicate an aliased mapping should be merged in to the current mapping isn’t part of the core Yaml spec, but it is part of the tag repository. The current Yaml library provided by Ruby – Psych – provides the dump and load methods which allow easy serialization and deserialization of … Read more
Use Net::HTTP: require ‘net/http’ source = Net::HTTP.get(‘stackoverflow.com’, ‘/index.html’)
Simply because they are not thread safe. Many rails=capable servers are multi-threaded. That means there may be multiple running instances of your application at any given time and any request by one of your users is going to be arbitrarily assigned to one of them. Class variables are not shared between processes so there is … Read more
Apparently there is a hard limit on the stack size for mac os x, taken from http://lists.apple.com/archives/scitech/2004/Oct/msg00124.html granted this is quite old, and Im not sure if its still true anymore, but to set it simply call ulimit -s hard, its 65532. or about 65 megs. I did some tests on snow leopard, 10.6.8, and … Read more