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Spring Expression Language (SpEL) with @Value: dollar vs. hash ($ vs. #)
....com/javaee/5/tutorial/doc/bnahq.html which served as a template for SpEL. From the Spring docu: "The Spring Expression Language (SpEL for short) is a powerful expression language that supports querying and manipulating an object graph at runtime. The language syntax is similar to Unified EL but off...
Pure virtual destructor in C++
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And since this got a down vote, I should clarify: If you derive anything from A and then try to delete or destroy it, A's destructor will eventually be called. Since it is pure and doesn't have an implementation, undefined behavior will ensue. On one popular platform, that will invoke the purecall...
How to test if one java class extends another at runtime?
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Are you looking for:
Super.class.isAssignableFrom(Sub.class)
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private final static attribute vs private final attribute
... final over private static final to squeeze out/reclaim that little memory from the class? Let's say for the calculator device with limited ram but plenty of CPU resources.
– Win Myo Htet
Jun 14 '13 at 21:29
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What makes JNI calls slow?
... making its own calls to the JVM. Accessing Java fields, methods and types from the native code requires something similar to reflection. Signatures are specified in strings and queried from the JVM. This is both slow and error-prone.
Java Strings are objects, have length and are encoded. Accessing ...
How do you handle multiple submit buttons in ASP.NET MVC Framework?
Is there some easy way to handle multiple submit buttons from the same form? For example:
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Comparator.reversed() does not compile using lambda
...dditional type information that fills this gap. This information is absent from the third line, so the compiler infers u to be Object (the inference fallback of last resort), which fails.
Obviously if you can use a method reference, do that and it'll work. Sometimes you can't use a method reference...
Reload an iframe with jQuery
...rameId);
iframe.src = iframe.src;
If you are trying to reload the iframe from another iframe, you are out of luck, that is not possible.
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Prevent body scrolling but allow overlay scrolling
...ent) {event.preventDefault();}, false ); which SADLY disables all elements from being scrollable, too. Have not found any solution so far (without extra plugIns)
– Garavani
Sep 4 '14 at 7:12
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Best way to reverse a string
...hars in C# are unicode characters, not bytes. Xor may be faster, but apart from being far less readable, that may even be what Array.Reverse() uses internally.
– Nick Johnson
Oct 23 '08 at 13:18
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