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Make first letter of a string upper case (with maximum performance)

...t.First().ToString().ToUpper() + input.Substring(1); } } } Really old answers public static string FirstCharToUpper(string input) { if (String.IsNullOrEmpty(input)) throw new ArgumentException("ARGH!"); return input.First().ToString().ToUpper() + String.Join("", input....
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How to perform mouseover function in Selenium WebDriver using Java?

... Its not really possible to perform a 'mouse hover' action, instead you need to chain all of the actions that you want to achieve in one go. So move to the element that reveals the others, then during the same chain, move to the now rev...
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Set focus on TextBox in WPF from view model

...ample? Is it a TextBox control? If yes, then you are on a wrong way. Generally speaking it's not a good idea to have any reference to UI in your ViewModel. You can ask "Why?" but this is another question to post on Stackoverflow :). The best way to track down issues with Focus is... debugging .Net ...
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Function for Factorial in Python

...The concept used here is called recursion ( en.wikipedia.org/wiki/Recursion_(computer_science) ) - a function calling itself is perfectly fine and often useful. – schnaader Nov 7 '14 at 10:06 ...
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How do I determine if my python shell is executing in 32bit or 64bit?

...test for older systems, this slightly more complicated test should work on all Python 2 and 3 releases: $ python-32 -c 'import struct;print( 8 * struct.calcsize("P"))' 32 $ python-64 -c 'import struct;print( 8 * struct.calcsize("P"))' 64 BTW, you might be tempted to use platform.architecture() fo...
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Python: using a recursive algorithm as a generator

...h a natural recursive solution. Now it happens that, even for relatively small input, the sequences are several thousands, thus I would prefer to use my algorithm as a generator instead of using it to fill a list with all the sequences. ...
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NULL vs nullptr (Why was it replaced?) [duplicate]

...problem" of my answer, plus it's a nice reference. This answer is just a small part of the reasons. – Cheers and hth. - Alf Dec 11 '13 at 3:22 1 ...
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Block Declaration Syntax List

...at this is distinct from "Blocks as Parameters"; in this instance, you're calling a method that wants a block argument with an anonymous block. If you have already declared a block variable, it is sufficient to pass the variable name as the argument. [someObject doSomethingWithBlock: ^return_type (...
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JSONDecodeError: Expecting value: line 1 column 1 (char 0)

...on struct = {} try: try: #try parsing to dict dataform = str(response_json).strip("'<>() ").replace('\'', '\"') struct = json.loads(dataform) except: print repr(resonse_json) print sys.exc_info() Note: Quotes within the data must be properly escaped ...
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What is the difference between C++ and Visual C++? [duplicate]

...979 at Bell Labs as an enhancement to the C programming language and originally named "C with Classes". It was renamed to C++ in 1983. C++ is widely used in the software industry. Some of its application domains include systems software, application software, device drivers, embedded software, high...