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jQuery $(document).ready and UpdatePanels?

...d only re-bind if needed. Here is the latest version of the documentation from Microsoft: msdn.microsoft.com/.../bb383810.aspx A better option you may have, depending on your needs, is to use jQuery's .on(). These method are more efficient than re-subscribing to DOM elements on every update. Rea...
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FirstOrDefault: Default value other than null

... From the documentation for FirstOrDefault [Returns] default(TSource) if source is empty; From the documentation for default(T): the default keyword, which will return null for reference types and zero for numeric va...
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Does Typescript support the ?. operator? (And, what's it called?)

...rator (specifically, the "accessor variant" of the existential operator). From CoffeeScript's documentation on Operators: The accessor variant of the existential operator ?. can be used to soak up null references in a chain of properties. Use it instead of the dot accessor . in cases where the ...
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Private pages for a private Github repo

...blic. So no, at this time there is no way to create private GitHub pages from a private GitHub repository. EDIT: A simple workaround A workaround for some situations that might be helpful is to simply rename the repo to something other than the GitHub pages format while you want it to be privat...
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How can I use Timer (formerly NSTimer) in Swift?

...ton) { timer.invalidate() } // called every time interval from the timer func timerAction() { counter += 1 label.text = "\(counter)" } } Delayed event You can also use a timer to schedule a one time event for some time in the future. The main difference fr...
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Display image as grayscale using matplotlib

... The following code will load an image from a file image.png and will display it as grayscale. import numpy as np import matplotlib.pyplot as plt from PIL import Image fname = 'image.png' image = Image.open(fname).convert("L") arr = np.asarray(image) plt.imshow(...
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How to create an empty file at the command line in Windows?

...EMptyFile.txt copy /b NUL EmptyFile.txt "How to create empty text file from a batch file?" (2008) also points to: type NUL > EmptyFile.txt # also echo. 2>EmptyFile.txt copy nul file.txt > nul # also in qid's answer below REM. > empty.file fsutil file createnew file.cmd 0 # to create...
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How exactly does tail recursion work?

...eturn address of the function making the tail call, instead of the address from which the tail call was made. – Steve Jessop Mar 20 '13 at 9:59 ...
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What does the exclamation mark do before the function?

...ould seem to warrant. The unary operator ! (also ~, - and +) disambiguates from a function declaration, and allows the parens at the end () to invoke the function in-place. This is often done to create a local scope / namespace for variables when writing modular code. – Tom Aug...
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Are inline virtual functions really a non-sense?

... Virtual functions can be inlined sometimes. An excerpt from the excellent C++ faq: "The only time an inline virtual call can be inlined is when the compiler knows the "exact class" of the object which is the target of the virtual function call. This can happen only ...