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Why is there no String.Empty in Java?

I understand that every time I type the string literal "" , the same String object is referenced in the string pool. 11 An...
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Getting MAC Address

I need a cross platform method of determining the MAC address of a computer at run time. For windows the 'wmi' module can be used and the only method under Linux I could find was to run ifconfig and run a regex across its output. I don't like using a package that only works on one OS, and parsing ...
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CSS Selector “(A or B) and C”?

This should be simple, but I'm having trouble finding the search terms for it. Let's say I have this: 4 Answers ...
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Selecting data from two different servers in SQL Server

How can I select data in the same query from two different databases that are on two different servers in SQL Server? 15 An...
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Rails extending ActiveRecord::Base

I've done some reading about how to extend ActiveRecord:Base class so my models would have some special methods. What is the easy way to extend it (step by step tutorial)? ...
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Does Django scale? [closed]

I'm building a web application with Django. The reasons I chose Django were: 29 Answers ...
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How to calculate an angle from three points? [closed]

Lets say you have this: 16 Answers 16 ...
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C++: const reference, before vs after type-specifier

What is the difference between the arguments in: 7 Answers 7 ...
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How to write into a file in PHP?

I have this script on one free PHP-supporting server: 9 Answers 9 ...
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What does the comma operator , do?

What does the , operator do in C? 8 Answers 8 ...