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Rails 3.1: Engine vs. Mountable App
...ntable Engine
The engine's namespace is isolated by default:
# my_engine/lib/my_engine/engine.rb
module MyEngine
class Engine < Rails::Engine
isolate_namespace MyEngine
end
end
With a mountable engine, the routes are namespaced and the parent app can bundle this functionality unde...
How to install the JDK on Ubuntu Linux
...elow, in "Terminal" using your installation path...
export JAVA_HOME=/usr/lib/jvm/java-8-openjdk
(Note: /usr/lib/jvm/java-8-openjdk is symbolically used here just for demostration. You should use your path as per your installation.)
For PATH (Environment Variable) type command as shown below, in ...
How can I tell if a library was compiled with -g?
I have some compiled libraries on x86 Linux and I want to quickly determine whether they were compiled with debugging symbols.
...
What are libtool's .la file for?
What are libtool's .la files for? How are they used with a shared object?
3 Answers
...
How to set Oracle's Java as the default Java in Ubuntu?
...
I put the line:
export JAVA_HOME=/usr/lib/jvm/java-7-oracle
in my ~/.bashrc file.
/usr/lib/jvm/java7-oracle should be a symbolic link pointing to /usr/lib/jvm/java-7-oracle-[version number here].
The reason it's a symbolic link is that in case there's a new v...
R: rJava package install failing
...al setting for PATH and JAVA_HOME looked like this:
export JAVA_HOME=/usr/lib/jvm/java-6-sun
export PATH=$PATH:$JAVA_HOME/bin
And I added /jre so it now looks like this:
export JAVA_HOME=/usr/lib/jvm/java-6-sun/jre
export PATH=$PATH:$JAVA_HOME/bin
Everything in Java seemed to work fine without...
jar not loaded. See Servlet Spec 2.3, section 9.7.2. Offending class: javax/servlet/Servlet.class
... Maven project which is also a dynamic web project. I have used all Spring libraries in Maven. I created web.xml , but when I start my Tomcat 7 server I am getting the following message:
...
Run a JAR file from the command line and specify classpath
...clipse Export function). My dependencies are all in a directory labeled lib . I can't seem to get a straight answer on how to execute my JAR file while specifying it should use the lib/* as the classpath.
...
Couldn't connect to server 127.0.0.1:27017
...
Step 1: Remove lock file.
sudo rm /var/lib/mongodb/mongod.lock
Step 2: Repair mongodb.
sudo mongod --repair
Step 3: start mongodb.
sudo start mongodb
or
sudo service mongodb start
Step 4: Check status of mongodb.
sudo status mongodb
or
sudo service mongo...