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M_PI works with math.h but not with cmath in Visual Studio

... Interestingly I checked this on an app of mine and I got the same error. I spent a while checking through headers to see if there was anything undef'ing the _USE_MATH_DEFINES and found nothing. So I moved the #define _USE_MATH_DEFINES #include <cmath> to be th...
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How to disable HTML button using JavaScript?

...attributes are defined as boolean, which means you can specify their value and leave everything else out. i.e. Instead of disabled="disabled", you include only the bold part. In HTML 4, you should include only the bold part as the full version is marked as a feature with limited support (although th...
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Mailto links do nothing in Chrome but work in Firefox?

...n change how mailto: links behave in chrome by visiting chrome://settings/handlers, or Chrome Settings->Content Settings->Manage Handlers... If "email" is not listed on that page, then see this answer regarding how to proceed. ...
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Coding Practices which enable the compiler/optimizer to make a faster program

... Write to local variables and not output arguments! This can be a huge help for getting around aliasing slowdowns. For example, if your code looks like void DoSomething(const Foo& foo1, const Foo* foo2, int numFoo, Foo& barOut) { for (int...
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In Python, using argparse, allow only positive integers

... type would be the recommended option to handle conditions/checks, as in Yuushi's answer. In your specific case, you can also use the choices parameter if your upper limit is also known: parser.add_argument('foo', type=int, choices=xrange(5, 10)) Note: Use range ...
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How do you detect/avoid Memory leaks in your (Unmanaged) code? [closed]

... unmanaged C/C++ code, what are the best practices to detect memory leaks? And coding guidelines to avoid? (As if it's that simple ;) ...
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How to use ng-repeat without an html element

...er it comes out) you'll be able to repeat over multiple elements, e.g., dt and dd: youtube.com/watch?v=W13qDdJDHp8&t=17m28s – Mark Rajcok Jul 18 '13 at 13:50 ...
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How do I format a string using a dictionary in python-3.x?

..."]} {geopoint["longitude"]}') 41.123 71.091 Note the outer single quotes and inner double quotes (you could also do it the other way around). share | improve this answer | ...
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Adding a new value to an existing ENUM Type

... NOTE if you're using PostgreSQL 9.1 or later, and you are ok with making changes outside of a transaction, see this answer for a simpler approach. I had the same problem few days ago and found this post. So my answer can be helpful for someone who is looking for solut...
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How can I find and run the keytool

... Or C:\Program Files\Android\Android Studio\jre\bin – SHAHM Jul 25 '18 at 5:41 ...