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Java Programming - Where should SQL statements be stored? [closed]
...e application grows in terms of size and/or reusability, the more the need is to externalize/abstractize the SQL statements.
Hardcoded (as static final constants) is the first step.
Stored in a file (properties/xml file) is the next step.
Metadata driven (as done by an ORM like Hibernate/JPA) is th...
Why is address zero used for the null pointer?
...ero after freeing their memory, because it means freeing the pointer again isn't dangerous; when I call malloc it returns a pointer with the value zero if it can't get me memory; I use if (p != 0) all the time to make sure passed pointers are valid, etc.
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How do you check that a number is NaN in JavaScript?
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Try this code:
isNaN(parseFloat("geoff"))
For checking whether any value is NaN, instead of just numbers, see here: How do you test for NaN in Javascript?
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Static variable inside of a function in C
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There are two issues here, lifetime and scope.
The scope of variable is where the variable name can be seen. Here, x is visible only inside function foo().
The lifetime of a variable is the period over which it exists. If x were define...
400 BAD request HTTP error code meaning?
...s are typically, and correctly I would say, used to indicate that the JSON is invalid in some way according to the API specification for the service.
By that logic, both the scenarios you provided should be 400's.
Imagine instead this were XML rather than JSON. In both cases, the XML would never p...
String vs. StringBuilder
...e between String and StringBuilder ( StringBuilder being mutable) but is there a large performance difference between the two?
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What is the meaning of single and double underscore before an object name?
...e are simply to indicate to other programmers that the attribute or method is intended to be private. However, nothing special is done with the name itself.
To quote PEP-8:
_single_leading_underscore: weak "internal use" indicator. E.g. from M import * does not import objects whose name starts...
What is the >>>= operator in C?
Given by a colleague as a puzzle, I cannot figure out how this C program actually compiles and runs. What is this >>>= operator and the strange 1P1 literal? I have tested in Clang and GCC. There are no warnings and the output is "???"
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How much is too much with C++11 auto keyword?
...word available in the C++11 standard for complicated templated types which is what I believe it was designed for. But I'm also using it for things like:
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How do arrays in C# partially implement IList?
So as you may know, arrays in C# implement IList<T> , among other interfaces. Somehow though, they do this without publicly implementing the Count property of IList<T> ! Arrays have only a Length property.
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