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Why is it impossible to build a compiler that can determine if a C++ function will change the value
I read this line in a book:
13 Answers
13
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How do you force a makefile to rebuild a target
I have a makefile that builds and then calls another makefile. Since this makefile calls more makefiles that does the work it doesnt really change. Thus it keeps thinking the project is built and upto date.
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Is a memory leak created if a MemoryStream in .NET is not closed?
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If something is Disposable, you should always Dispose it. You should be using a using statement in your bar() method to make sure ms2 gets Disposed.
It will eventually get cleaned up by the garbage collector, but it is always good practi...
asp.net mvc: why is Html.CheckBox generating an additional hidden input
...Html.CheckBox("foo") generates 2 inputs instead of one, anybody knows why is this so ?
10 Answers
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What does “javascript:void(0)” mean?
... the given
expression and then returns undefined.
The void operator is often used merely
to obtain the undefined primitive
value, usually using “void(0)” (which
is equivalent to “void 0”). In these
cases, the global variable undefined
can be used instead (assuming it has
n...
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...