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How to prevent buttons from submitting forms

...; return false;">Remove Last Item</button> ...that'll keep them from triggering a submit action when an exception occurs in the event handler. Then, fix your removeItem() function so that it doesn't trigger an exception: function removeItem() { var rows = $('form tr'); if ( rows.leng...
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start MySQL server from command line on Mac OS Lion

...ol installed in System Preference, I want to know the instruction to start from command-line. I do as follow: 13 Answers ...
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Changing Java Date one hour back

...e java.time types, call the conversion methods. Here is example code going from an Instant or a ZonedDateTime to a java.util.Date. java.util.Date date = java.util.Date.from( instant ); …or… java.util.Date date = java.util.Date.from( zdt.toInstant() ); About java.time The java.time frame...
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How to subtract X days from a date using Java calendar?

Anyone know a simple way using Java calendar to subtract X days from a date? 10 Answers ...
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pip broke. how to fix DistributionNotFound error?

...n/pip and everything worked again. __requires__ = 'pip==0.8.2' import sys from pkg_resources import load_entry_point if __name__ == '__main__': sys.exit( load_entry_point('pip==0.8.2', 'console_scripts', 'pip')() ) I installed pip through easy_install which probably caused me thi...
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Why is “final” not allowed in Java 8 interface methods?

...wed in this light. (Note too that class methods are going to be different from interface methods, no matter what the intent, by virtue of the fact that interface methods can be multiply inherited.) The basic idea of a default method is: it is an interface method with a default implementation, and ...
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Handling Dialogs in WPF with MVVM

...ple of this control in terms of how to show it, and retrieve dialog result from it etc. Especially in MVVM scenario in Silverlight. – Roboblob Jan 8 '10 at 15:41 16 ...
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Why don't C++ compilers define operator== and operator!=?

... That problem doesn't stop it from generating a copy ctor, where it's quite harmful. – MSalters Oct 20 '08 at 9:57 81 ...
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My Understanding of HTTP Polling, Long Polling, HTTP Streaming and WebSockets

... and the web regarding the keywords in my question title and learned a lot from them. Some of the questions I read are related to specific implementation challenges while others focus on general concepts. I just want to make sure I understood all of the concepts and the reasoning why technology X wa...
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Why are elementwise additions much faster in separate loops than in a combined loop?

...ch large allocations are requested, the allocator will request fresh pages from the OS. Therefore, there is a high chance that large allocations will appear at the same offset from a page-boundary. Here's the test code: int main(){ const int n = 100000; #ifdef ALLOCATE_SEPERATE double *a1 =...