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Fastest way to check if a value exists in a list

What is the fastest way to know if a value exists in a list (a list with millions of values in it) and what its index is? 1...
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How efficient is locking an unlocked mutex? What is the cost of a mutex?

In a low level language (C, C++ or whatever): I have the choice in between either having a bunch of mutexes (like what pthread gives me or whatever the native system library provides) or a single one for an object. ...
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Facebook API “This app is in development mode”

What does "development mode" mean for a facebook app? I find no exact explanation of what I can and can't do while in development mode and what's the relation with the "Not available to all users because your app is not live". ...
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How to print instances of a class using print()?

...> t Test() >>> print(t) member of Test The __str__ method is what happens when you print it, and the __repr__ method is what happens when you use the repr() function (or when you look at it with the interactive prompt). If this isn't the most Pythonic method, I apologize, because I'm s...
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Html List tag not working in android textview. what can i do?

... then what can i do to rectify it? – Praveen Jun 30 '10 at 15:04 2 ...
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What is the difference between JAX-RS and JAX-WS?

...d vice versa? 2) I can't think of any reason it wouldn't be able to. What does it mean by "REST is particularly useful for limited-profile devices, such as PDAs and mobile phones"? 3) REST based architectures typically will use a lightweight data format, like JSON, to send data back and fort...
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Emulate a do-while loop in Python?

... I am not sure what you are trying to do. You can implement a do-while loop like this: while True: stuff() if fail_condition: break Or: stuff() while not fail_condition: stuff() What are you doing trying to use a do while lo...
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What is JavaScript garbage collection?

What is JavaScript garbage collection? What's important for a web programmer to understand about JavaScript garbage collection, in order to write better code? ...
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Understand convertRect:toView:, convertRect:FromView:, convertPoint:toView: and convertPoint:fromVie

...bview corresponds to a point at 20,30 in the superview. This conversion is what those methods are doing. Your example above is pointless (no pun intended) since it converts a point from a view to itself, so nothing will happen. You would more commonly find out where some point of a view was in rel...
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Calculate the execution time of a method

...ve an I/O time-taking method which copies data from a location to another. What's the best and most real way of calculating the execution time? Thread ? Timer ? Stopwatch ? Any other solution? I want the most exact one, and briefest as much as possible. ...