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How to check if field is null or empty in MySQL?

... Gleb KemarskyGleb Kemarsky 7,85855 gold badges3232 silver badges5555 bronze badges add a comment ...
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What does Expression.Quote() do that Expression.Constant() can’t already do?

...sure induced, if you do this you'll get a "variable 's' of type 'System.Int32' is not defined" exception on the invocation. (Aside: I've just reviewed the code generator for delegate creation from quoted expression trees, and unfortunately a comment that I put into the code back in 2006 is still ...
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How can I create a two dimensional array in JavaScript?

... | edited Aug 14 '19 at 6:32 Adam 12k99 gold badges8080 silver badges137137 bronze badges answered Jun 8...
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AngularJs $http.post() does not send data

...| edited Jul 15 '15 at 11:32 answered Nov 29 '13 at 0:45 Fe...
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What is a NullReferenceException, and how do I fix it?

...t value when a null is encountered: IService CreateService(ILogger log, Int32? frobPowerLevel) { var serviceImpl = new MyService(log ?? NullLog.Instance); // Note that the above "GetValueOrDefault()" can also be rewritten to use // the coalesce operator: serviceImpl.FrobPowerLevel = fr...
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How do I break a string over multiple lines?

... Matt WilliamsonMatt Williamson 32.1k1010 gold badges5757 silver badges6969 bronze badges ...
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Sending multipart/formdata with jQuery.ajax

...how is it possible to send this Data to the server? The resulting array ( $_POST ) on the serverside php-script is 0 ( NULL ) when using the file-input. ...
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How do I concatenate two arrays in C#?

...e. – Jon Schneider Feb 20 '15 at 19:32 1 This is what happens without the toArray() Cannot impli...
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How to generate a random number in C++?

...d (assuming rand() itself is uniformly distributed from 0 to RAND_MAX) */ while( ( n = rand() ) > RAND_MAX - (RAND_MAX-5)%6 ) { /* bad value retrieved so get next one */ } printf( "%d,\t%d\n", n, n % 6 + 1 ); } return 0; } ^^^ THAT sequence from a sing...
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How can I extend typed Arrays in Swift?

... | edited May 25 at 7:32 Ramis 7,11744 gold badges4949 silver badges7373 bronze badges answered Nov ...