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Ruby optional parameters

...cope ||= LDAP::LDAP_SCOPE_SUBTREE ... do something ... end Now if you call the method as above, the behaviour will be as you expect. share | improve this answer | follow ...
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Make anchor link go some pixels above where it's linked to

... window.scrollTo(window.scrollX, window.scrollY - 100); }); This will allow the browser to do the work of jumping to the anchor for us and then we will use that position to offset from. EDIT 1: As was pointed out by @erb, this only works if you are on the page while the hash is changed. Enter...
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How can I return pivot table output in MySQL?

... This basically is a pivot table. A nice tutorial on how to achieve this can be found here: http://www.artfulsoftware.com/infotree/qrytip.php?id=78 I advise reading this post and adapt this solution to your needs. Update After the l...
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What does $(function() {} ); do?

Sometimes I make a function and call the function later. 5 Answers 5 ...
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Iterator invalidation rules

... C++17 (All references are from the final working draft of CPP17 - n4659) Insertion Sequence Containers vector: The functions insert, emplace_back, emplace, push_back cause reallocation if the new size is greater than the old capa...
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How do you remove a Cookie in a Java Servlet

... I tried setMaxAge(0) initially in firefox but I still saw it listed in my cookies as "Expires: at end of session" and thought my servlet was still receiving that expired cookie. It might've been a combo of needing to set the response.setContentType(...
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Android Fragments and animation

... To achieve the same thing with hiding or showing a fragment you'd simply call ft.show or ft.hide, passing in the Fragment you wish to show or hide respectively. For reference, the XML animation definitions would use the objectAnimator tag. An example of slide_in_left might look something like this...
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Is it possible to make anonymous inner classes in Java static?

... a reference to the pointer of the containing instance (they are also not called inner classes anymore, they are called nested classes). ...
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What's the best way to do a backwards loop in C/C#/C++?

... std::vector Using iterators C++ allows you to do this using std::reverse_iterator: for(std::vector<T>::reverse_iterator it = v.rbegin(); it != v.rend(); ++it) { /* std::cout << *it; ... */ } Using indices The unsigned integral type returned by std::vector<T>::size is not...
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Reactive Extensions bug on Windows Phone

...r is creating a connection to the compiler, and the debugger as well needs all vars to be strictly typed. The debugger is guessing correct, and the compiler is somehow taking ques from it. It doesnt really matter why the debugger fixes the problem, the root cause has been found. ...