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Create directory if it does not exist

... What will -Force actually do? The documentation says "Forces this cmdlet to create an item that writes over an existing read-only item". Will it delete an existing folder? It should be clear in this answer. – Peter Mortensen...
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Handling optional parameters in javascript

... second argument is a function or not: function getData (id, parameters, callback) { if (arguments.length == 2) { // if only two arguments were supplied if (Object.prototype.toString.call(parameters) == "[object Function]") { callback = parameters; } } //... } You can also us...
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Time complexity of Sieve of Eratosthenes algorithm

...oose upper-bound is n(1+1/2+1/3+1/4+1/5+1/6+…1/n) (sum of reciprocals of all numbers up to n), which is O(n log n): see Harmonic number. A more proper upper-bound is n(1/2 + 1/3 + 1/5 + 1/7 + …), that is sum of reciprocals of primes up to n, which is O(n log log n). (See here or here.) The "find...
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$PHP_AUTOCONF errors on mac os x 10.7.3 when trying to install pecl extensions

...imilar errors. This is on MAC OS X 10.7.3 (lion) and I also have XCODE installed on it. I also installed Zend Server community edition before running these commands and have CFLAGS='-arch i386 -arch x86_64' environment variables set. So please help with what I need to do ...
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How to write LaTeX in IPython Notebook?

...you would. Then use nbconvert to turn the ipynb to TeX (code, figures and all), and run latex to render that to PDF, etc. You don't get live-rendered TeX in the browser like you do with MathJax / Markdown, but you do still have TeX / code in one document. – minrk ...
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Change priorityQueue to max priorityqueue

...unction, names its input parameters x and y and returns y-x, which is basically what the int comparator class does except it returns x-y – Edi Bice Jun 22 '17 at 19:44 15 ...
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“From View Controller” disappears using UIViewControllerContextTransitioning

... goes black. The key UIWindow is completely empty – no view hierarchy at all! I played around a bit and it looks like there is an easy workaround, for simple cases. You can just re-add the toViewController's view as a subview of the key window's: transitionContext.completeTransition(true) UIAp...
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Is it possible in SASS to inherit from a class in another file?

The question pretty much says it all. 4 Answers 4 ...
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test if event handler is bound to an element in jQuery [duplicate]

...a('events') has been removed in jQuery 1.8. For "debugging, you can use $._data(element, 'events'), but it's undocumented (and may change). blog.jquery.com/2012/08/09/jquery-1-8-released – Rocket Hazmat Aug 16 '12 at 18:43 ...
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How are VST Plugins made?

... VST2. These tutorials cover creating plugins that run on Win/Mac, 32/64, all plugin formats from the same code base. share | improve this answer | follow | ...