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How do I add a simple onClick event handler to a canvas element?

I'm an experienced Java programmer but am looking at some JavaScript/HTML5 stuff for the first time in about a decade. I'm completely stumped on what should be the simplest thing ever. ...
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Difference between two dates in MySQL

... SELECT TIMEDIFF('2007-12-31 10:02:00','2007-12-30 12:01:01'); -- result: 22:00:59, the difference in HH:MM:SS format SELECT TIMESTAMPDIFF(SECOND,'2007-12-30 12:01:01','2007-12-31 10:02:00'); -- result: 79259 the difference in seco...
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How to change the value of ${user} variable used in Eclipse templates

...ing the default @author template I would like Eclipse to use user's real name taken from account information (in Linux - but Windows solution is also welcome). Entering it somewhere into Eclipse configuration would be acceptable, too, alas I can't find the right place. ...
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iOS 6 apps - how to deal with iPhone 5 screen size? [duplicate]

...ints to lay things out. Nothing will be hard-coded, and your life will become a lot simpler. However, if you have to support older iOS's, then it really depends on your application. A majority of applications that use a standard navigation bar, and/or tab bar, could simply expand the content in the...
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How to pre-populate the sms body text via an html link

...UPDATE: Apparently iOS8 had to go and change things on us, so thanks to some of the other commenters/responders, there's a new style for iOS: <a href="sms:/* phone number here */&body=/* body text here */">Link</a> (phone number is optional) ...
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Compiling simple Hello World program on OS X via command line

...'ve got a simple hello world example that I'm trying to compile on OS X, named hw.cpp : 8 Answers ...
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How to use PHP OPCache?

...code caching module called OPCache, but there doesn't appear to be any documentation for it. 5 Answers ...
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Responsive iframe using Bootstrap

... Option 1 With Bootstrap 3.2 you can wrap each iframe in the responsive-embed wrapper of your choice: http://getbootstrap.com/components/#responsive-embed <!-- 16:9 aspect ratio --> <div class="embed-responsive embed-responsive-16by9"> <iframe class="embed-...
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promise already under evaluation: recursive default argument reference or earlier problems?

... Formal arguments of the form x=x cause this. Eliminating the two instances where they occur we get: f <- function(x, T) { 10 * sin(0.3 * x) * sin(1.3 * x^2) + 0.001 * x^3 + 0.2 * x + 80 } g <- function(x, T, f. = f) { ## 1...
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Haskell: Where vs. Let

...re vs. Let but I am having trouble discerning when to use each. Could someone please provide some context or perhaps a few examples that demonstrate when to use one over the other? ...