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How can I detect if a browser is blocking a popup?

...al idea was to show another content without closing the main window. As of now, there are other ways to do that: JavaScript is able to send requests for server, so popups are rarely used. But sometimes they are still handy. In the past evil sites abused popups a lot. A bad page could open tons of p...
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Constructor of an abstract class in C#

... possible to write constructor for an abstract class in C#? As far as I know we can't instantiate an abstract class.. so what is it for? You can't instantiate the class, right? ...
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Ineligible Devices section appeared in Xcode 6.x.x

...thanks @steveb). You won't see your device in deploy target list. I don't know if other versions are supported. Update 3. Use Xcode 6.2 instead of Xcode 6.3 beta in order to debug with a device running iOS 8.2 Updated 4 : for Xcode 6.3 (and eventually 6.3 beta if someone use it :) ), if you have thi...
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How can I get a web site's favicon?

...s/files from the same place. Getting the default icons from my system for known file types isn't terribly complicated, but I don't know how to get the favicon from a website. (SO has the grey->orange stack icon in the address bar for instance) ...
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Getting the client's timezone offset in JavaScript

...ndard since ES 1, so I'm sure any implementation problem might be fixed by now, I mean, that is a 7 years old article. – LasagnaAndroid May 30 '14 at 20:24 54 ...
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Using HTML5/Canvas/JavaScript to take in-browser screenshots

...http://hertzen.com/experiments/jsfeedback/ edit The html2canvas script is now available separately here and some examples here. edit 2 Another confirmation that Google uses a very similar method (in fact, based on the documentation, the only major difference is their async method of traversing/dra...
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Unable to simultaneously satisfy constraints, will attempt to recover by breaking constraint

...o do this: DEBUG VIEW HIERARCHY (Do not recommend this way) Since you know where to find unexpected constraints (PBOUserWorkDayHeaderView) there is a way to do this fairly well. Lets find UIView and NSLayoutConstraint in red rectangles. Since we know their id in memory it is quite easy. Stop a...
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How do I fix PyDev “Undefined variable from import” errors?

...art Eclipse, do Project>Pydev>Remove error markers, and numpy should now appear in the Forced builtins. – smci Nov 1 '17 at 16:43 ...
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How can I profile C++ code running on Linux?

... of the time (and thus costs that much). For simplicity, suppose we don't know what f is, but assume it is either 0.1, 0.2, 0.3, ... 0.9, 1.0, and the prior probability of each of these possibilities is 0.1, so all of these costs are equally likely a-priori. Then suppose we take just 2 stack sample...
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Where can I learn jQuery? Is it worth it?

...es learning about web development on w3schools.com . It's hit or miss, I know, but the PHP and CSS sections specifically have proven very useful for reference. ...