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start MySQL server from command line on Mac OS Lion

I installed mySQL for my Mac. Beside starting the SQL server with mySQL.prefPane tool installed in System Preference, I want to know the instruction to start from command-line. I do as follow: ...
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How to avoid Dependency Injection constructor madness?

I find that my constructors are starting to look like this: 9 Answers 9 ...
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Why are elementwise additions much faster in separate loops than in a combined loop?

Suppose a1 , b1 , c1 , and d1 point to heap memory and my numerical code has the following core loop. 10 Answers ...
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Android update activity UI from service

I have a service which is checking for new task all the time. If there is new task, I want to refresh the activity UI to show that info. I did find https://github.com/commonsguy/cw-andtutorials/tree/master/18-LocalService/ this example. Is that a good approch ? Any other examples? ...
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Enum type constraints in C# [duplicate]

What is the reason behind C# not allowing type constraints on Enum 's? I'm sure there is a method behind the madness, but I'd like to understand why it's not possible. ...
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How do I specify new lines on Python, when writing on files?

In comparison to Java (in a string), you would do something like "First Line\r\nSecond Line" . 13 Answers ...
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How can I add (simple) tracing in C#? [closed]

I want to introduce some tracing to a C# application I am writing. Sadly, I can never really remember how it works and would like a tutorial with reference qualities to check up on every now and then. It should include: ...
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How do I git rm a file without deleting it from disk? [duplicate]

The command removes the file in my system. I meant it to remove only the file from Git-repository. 2 Answers ...
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Ruby array to string conversion

I have a ruby array like ['12','34','35','231'] . 12 Answers 12 ...
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How can I get the last day of the month in C#? [duplicate]

How can I find the last day of the month in C#? 5 Answers 5 ...