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When to use nil, blank, empty? [duplicate]
...method you ask for does not
belong to Ruby, it is a Rails
extension:
http://api.rubyonrails.com/classes/Object.html#M000011.
If you click through to the link at the end of that post you will find that the blank? method simply combines the nil? and empty? method calls.
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c++ boost::multi_index composite keys efficiency - c++1y / stl - 清泛IT社区，为创新赋能！
...k questions and I will try my best to clarify exactly what I mean!
From：http://stackoverflow.com/questio ... ite-keys-efficiency
Lookups involving composite keys do not go through any two-stage process as you describe. composite_key-induced orderings are normal orderings, the only special thing ...
Technically what is the main difference between Oracle JDK and OpenJDK? [duplicate]
...ran into problems with code using URLConnection to poll a data source over HTTP. Worked fine with Oracle JDK 7 & 8, but would intermittently lose cookie headers with OpenJDK 7 & 8. I was really hoping that something like HttpUrlConnection would be uniform across both now... In the end swi...
Difference between window.location.href, window.location.replace and window.location.assign
...orrect. The assign method does add a new record to the history.
Reference: http://developer.mozilla.org/en/window.location
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undefined method `source_index' for Gem:Module (NoMethodError)
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This helped me: http://djellemah.com/blog/2013/02/27/rails-23-with-ruby-20/
I did this in combination with gem update --system 1.8.25, which might not be needed for your case.
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Ruby : How to write a gem? [closed]
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This is how I usually create and release Gems:
Sign-up for https://github.com
Sign-up for https://rubygems.org
$ gem install ore rubygems-tasks rdoc rspec
$ mine awesome_gem
cd awesome_gem/ and edit the README.rdoc and awesome_gem.gemspec, write code in lib/awesome_gem/ and adding RS...
php implode (101) with quotes
... $value = "'$value'";
}
$comma_separated = implode(",", $array);
Demo: http://codepad.org/O2kB4fRo
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Any good boolean expression simplifiers out there? [closed]
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You can try Wolfram Alpha as in this example based on your input:
http://www.wolframalpha.com/input/?i=((A%20OR%20B)%20AND%20(NOT%20B%20AND%20C)%20OR%20C)&t=crmtb01&f=rc
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Supervisor socket error issue [closed]
... start someapp ## works
cd somedirectory
supervisorctl restart someapp ## http://localhost:9001 refused connection
Solution would be to always use the absolute path. e.g.:
Good:
supervisord -c /etc/supervisor/supervisord.conf
Bad:
supervisord -c supervisord.conf
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ASP.NET Identity's default Password Hasher - How does it work and is it secure?
...e of the salt to generate and the number of hashing iterations to perform.
https://msdn.microsoft.com/en-us/library/h83s4e12(v=vs.110).aspx
The salt and the hash are then mashed together(salt first followed
by the hash) and encoded as a string (so the salt is encoded in the
hash). This encoded hash...