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Use of Initializers vs Constructors in Java

So I've been brushing up on my Java skills as of late and have found a few bits of functionality that I didn't know about previously. Static and Instance Initializers are two such techniques. ...
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Unit Testing bash scripts

We have a system that has some bash scripts running besides Java code. Since we are trying to Test Everything That Could Possibly Break, and those bash scripts may break, we want to test them. ...
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ggplot2 plot without axes, legends, etc

I want to use bioconductor's hexbin (which I can do) to generate a plot that fills the entire (png) display region - no axes, no labels, no background, no nuthin'. ...
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How to stop app that node.js express 'npm start'

...estop, stop, poststop: Run by the npm stop command. Set one of the above in your package.json, and then use npm stop npm help npm-stop You can make this really simple if you set in app.js, process.title = myApp; And, then in scripts.json, "scripts": { "start": "app.js" , "stop": "...
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Is asynchronous jdbc call possible?

...I don't understand how any of the proposed approaches that wrap JDBC calls in Actors, executors or anything else can help here - can someone clarify. Surely the basic problem is that the JDBC operations block on socket IO. When it does this it blocks the Thread its running on - end of story. Whatev...
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How to make a function wait until a callback has been called using node.js

... The "good node.js /event driven" way of doing this is to not wait. Like almost everything else when working with event driven systems like node, your function should accept a callback parameter that will be invoked when then computation is complete. The caller shoul...
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error: command 'gcc' failed with exit status 1 while installing eventlet

I wanted to install eventlet on my system in order to have "Herd" for software deployment.. but the terminal is showing a gcc error: ...
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Create code first, many to many, with additional fields in association table

...t's not possible to create a many-to-many relationship with a customized join table. In a many-to-many relationship EF manages the join table internally and hidden. It's a table without an Entity class in your model. To work with such a join table with additional properties you will have to create a...
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How to define an enumerated type (enum) in C?

I'm not sure what is the proper syntax for using C enums. I have the following code: 13 Answers ...
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Learning Ruby on Rails

... I've been moving from C# in my professional career to looking at Ruby and RoR in my personal life, and I've found linux to be slightly more appealing personally for development. Particularly now that I've started using git, the implement...