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Difference between `const shared_ptr` and `shared_ptr`?
...t; sA(new A);
shared_ptr<A> sA2(new A);
sA = sA2; // compile-error
return sA;
}
shared_ptr<A> f2() {
shared_ptr<const A> sA(new A);
sA->a = 4; // compile-error
return sA;
}
int main(int argc, char** argv) {
f1();
f2();
return 0;
}
...
Why is iostream::eof inside a loop condition (i.e. `while (!stream.eof())`) considered wrong?
...llowing is how eof can be used (and even, be more reliable than fail() for error checking):
while( !(in>>std::ws).eof() ) {
int data;
in >> data;
if ( in.fail() ) /* handle with break or throw */;
// now use data
}
(Thanks Tony D for the suggestion to highlight the ...
Advantage of switch over if-else statement
... your example, the clearest code is probably:
if (RequiresSpecialEvent(numError))
fire_special_event();
Obviously this just moves the problem to a different area of the code, but now you have the opportunity to reuse this test. You also have more options for how to solve it. You could use s...
Converting a string to JSON object
...
This is not working. It is throwing an error "SyntaxError: JSON.parse: unexpected character" . There is nothing wrong with the string as when i get the same string through a ajax request and handle it as "JSON", no problem occurs.
– Zer0
...
Troubleshooting “The use statement with non-compound name … has no effect”
Getting this error when I put use Blog; at the top.
5 Answers
5
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Escaping single quote in PHP when inserting into MySQL [duplicate]
...his does not answer the question why the two queries to not throw the same error...
– sjw
Apr 22 '10 at 3:01
1
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Redis connection to 127.0.0.1:6379 failed - connect ECONNREFUSED
...
that error fixed but now new error show i.e, "Error: ERR wrong number of arguments for 'set' command"
– vineet
Aug 27 '15 at 11:58
...
Run a PostgreSQL .sql file using command line arguments
...
Of course, you will get a fatal error for authenticating, because you do not include a user name...
Try this one, it is OK for me :)
psql -U username -d myDataBase -a -f myInsertFile
If the database is remote, use the same command with host
psql -h hos...
What is the reason for a red exclamation mark next to my project in Eclipse?
...stly for built problems only. See here for more details. It is about built error decorater seen in eclipse.
An extract from that page:
Build path problems are sometimes easy to miss among other problems in
a project. The Package Explorer and Project Explorer views now show a
new decorator o...
How to initialize private static members in C++?
...mber in C++? I tried this in my header file, but it gives me weird linker errors:
17 Answers
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