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Should I use encodeURI or encodeURIComponent for encoding URLs?

... It depends on what you are actually wanting to do. encodeURI assumes that the input is a complete URI that might have some characters which need encoding in it. encodeURIComponent will encode everything with special meaning, so you use it for components ...
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How to fix the flickering in User controls

...f controls, those holes are visible to the user for a while. They are normally white, contrasting badly with the BackgroundImage when it is dark. Or they can be black if the form has its Opacity or TransparencyKey property set, contrasting badly with just about anything. This is a pretty fundamen...
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Will Emacs make me a better programmer? [closed]

... who are merely good or competent will pick up an IDE and get to know it really well, and maybe do decently enough in it, but they'll restrict themselves to what the IDE provides for them. In other words, they adapt themselves to the IDE. The great programmers, on the other hand, will adapt their en...
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A Regex that will never be matched by anything

... This is actually quite simple, although it depends on the implementation / flags*: $a Will match a character a after the end of the string. Good luck. WARNING: This expression is expensive -- it will scan the entire line, find the en...
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Setting Windows PowerShell environment variables

...t finds in the WindowsPowerShell directory under My Documents folder. Typically you have a profile.ps1 file already there. The path on my computer is C:\Users\JaredPar\Documents\WindowsPowerShell\profile.ps1 share ...
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Regex Email validation

...ccurate as mine, I thought I would post it here. @"^[\w!#$%&'*+\-/=?\^_`{|}~]+(\.[\w!#$%&'*+\-/=?\^_`{|}~]+)*" + "@" + @"((([\-\w]+\.)+[a-zA-Z]{2,4})|(([0-9]{1,3}\.){3}[0-9]{1,3}))$"; For more info go read about it here: C# – Email Regular Expression Also, this checks for RFC validity ...
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What is the difference between an interface and abstract class?

...'t do anything. It's just a pattern. For example (pseudo code): // I say all motor vehicles should look like this: interface MotorVehicle { void run(); int getFuel(); } // My team mate complies and writes vehicle looking that way class Car implements MotorVehicle { int fuel; vo...
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What does the “===” operator do in Ruby? [duplicate]

... Just like with every other method in Ruby (or actually pretty much any object-oriented language), a === b means whatever the author of a's class wants it to mean. However, if you don't want to confuse the heck out of your colleagues, the convention is that === is the cas...
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How to remove convexity defects in a Sudoku square?

...surements[ ColorNegate@Binarize[srcAdjusted], {"ConvexArea", "Mask"}][[All, 2]]; largestComponent = Image[SortBy[components, First][[-1, 2]]] By filling this image, I get a mask for the sudoku grid: mask = FillingTransform[largestComponent] Now, I can use a 2nd order derivative fil...
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Rails: How does the respond_to block work?

...html The Responder does NOT contain a method for .html or .json, but we call these methods anyways! This part threw me for a loop. Ruby has a feature called method_missing. If you call a method that doesn't exist (like json or html), Ruby calls the method_missing method instead. http://ruby-meta...