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Purpose of returning by const value? [duplicate]
...on-const value, and you could write:
(a + b).expensive();
In the age of C++11, however, it is strongly advised to return values as non-const so that you can take full advantage of rvalue references, which only make sense on non-constant rvalues.
In summary, there is a rationale for this practice...
Does Java have buffer overflows?
...s:
If you call native code via JNI
In the JVM itself (usually written in C++)
The interpreter or JIT compiler does not work correctly (Java bytecode mandated bounds checks)
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Generic type conversion FROM string
...I must point out that my experience with parameterised types is limited to C++ and its templates, but I imagine there is some way to do the same sort of thing using C# generics.
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Func vs. Action vs. Predicate [duplicate]
...sed with Linq, Action and Func are concepts logically independent of Linq. C++ already contained the basic concept in form of typed function pointers.
Here is a small example for Action and Func without using Linq:
class Program
{
static void Main(string[] args)
{
Action<int>...
Memory address of variables in Java
...object has the same hashcode. I am confused because I have learned in c or c++ every variable or object have different memory location. Then in java How can identify or differentiate two objects with the same hashCode.
– Ved Prakash
Jun 8 '18 at 16:46
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How do I flush the cin buffer?
How do I clear the cin buffer in C++?
13 Answers
13
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How to declare a global variable in php?
...NTENT is attempted to modify? Is it just like final in Java or const in C, C++ and C#?
– Lion
Nov 23 '12 at 14:05
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Cast to int vs floor
...t in the top-most bits being dropped (C, probably) or undefined behaviour (C++ and possibly C). EG if your int is 32 bits, you will only have a sign bit plus 31 bits of data. So using this with a double that is large in size is going to produce unintended results.
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Creating a “logical exclusive or” operator in Java
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Bear in mind that you can't define new operators in C++ either. All you can do is give new meanings to the old ones.
– David Thornley
Apr 7 '09 at 20:57
Explicit specialization in non-namespace scope [duplicate]
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VC++ is non-compliant in this case - explicit specializations have to be at namespace scope. C++03, §14.7.3/2:
An explicit specialization shall be declared in the namespace of which the template is a member, or, for membe...