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Current time in microseconds in java

...now outdated. The OpenJDK and Oracle implementations of Java 9 come with a new implementation of Clock that provides for capturing the current moment with a resolution finer than milliseconds. On a MacBook Pro Retina I am getting the current time in microseconds (six digits of decimal fraction). Act...
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Signed to unsigned conversion in C - is it always safe?

...ther integer type other than _Bool, if the value can be represented by the new type, it is unchanged. Otherwise, if the new type is unsigned, the value is converted by repeatedly adding or subtracting one more than the maximum value that can be represented in the new type until the value is in the...
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How does IPython's magic %paste work?

...e for another useful IPython magic function. First to restate what @EOL said, one way to solve OP's problem is to turn off auto-indentation by first running %autoindent and doing the paste (not needed if you are using %paste, of course). Now to add more information to what is already there here, o...
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Configuration System Failed to Initialize

I'm new to Visual Studio. I'm currently creating a Login form. 27 Answers 27 ...
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What's the meaning of “=>” (an arrow formed from equals & greater than) in JavaScript?

...lly binds the this value (does not bind its own this, arguments, super, or new.target). Arrow functions are always anonymous. These function expressions are best suited for non-method functions and they can not be used as constructors. A Note on How this Works in Arrow Functions One of the most han...
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Dynamically update values of a chartjs chart

...up that look very nice: Here's an example of updating a line chart using new data: http://jsbin.com/yitep/5/edit Here's how we can update existing data on a line chart: http://jsbin.com/yitep/4/edit Original Post As of Nov 2013, there seem to be very few options for updating charts. There is...
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What is more efficient: Dictionary TryGetValue or ContainsKey+Item?

...t TryGetValue has a slight edge: static void Main() { var d = new Dictionary<string, string> {{"a", "b"}}; var start = DateTime.Now; for (int i = 0; i != 10000000; i++) { string x; if (!d.TryGetValue("a", out x)) throw new ApplicationExcepti...
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Cast an instance of a class to a @protocol in Objective-C

...unction () { StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f617616%2fcast-an-instance-of-a-class-to-a-protocol-in-objective-c%23new-answer', 'question_page'); } ); ...
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CSS Background Opacity [duplicate]

... Actually it does work in all new browsers and IE 9 and up. Take a look here example – daniels Jun 18 '14 at 20:33 12 ...
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Which .NET Dependency Injection frameworks are worth looking into? [closed]

... configuration through an internal DSL. Autofac is an IoC container of the new age with all of it's inherent functional programming support. It also takes a different approach on managing lifetime than the others. Autofac is still very new, but it pushes the bar on what is possible with IoC. Ninject...