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How do I use a custom deleter with a std::unique_ptr member?
...signatures:
Bar* create();
void destroy(Bar*);
You can write your class Foo like this
class Foo {
std::unique_ptr<Bar, void(*)(Bar*)> ptr_;
// ...
public:
Foo() : ptr_(create(), destroy) { /* ... */ }
// ...
};
Notice that you don't need to write any lambda or custom...
Convert list to array in Java [duplicate]
...
Either:
Foo[] array = list.toArray(new Foo[0]);
or:
Foo[] array = new Foo[list.size()];
list.toArray(array); // fill the array
Note that this works only for arrays of reference types. For arrays of primitive types, use the tra...
dyld: Library not loaded … Reason: Image not found
When trying to run an executable I've been sent in Mac OS X, I get the following error
31 Answers
...
Are PHP Variables passed by value or by reference?
... final test, var3: final test
Passed by value/reference example:
$var1 = "foo";
$var2 = "bar";
changeThem($var1, $var2);
print "var1: $var1, var2: $var2";
function changeThem($var1, &$var2){
$var1 = "FOO";
$var2 = "BAR";
}
output:
var1: foo, var2 BAR
Object variables passed by ref...
linux: kill background task
How do I kill the last spawned background task in linux?
8 Answers
8
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rsync error: failed to set times on “/foo/bar”: Operation not permitted
...
If /foo/bar is on NFS (or possibly some FUSE filesystem), that might be the problem.
Either way, adding -O / --omit-dir-times to your command line will avoid it trying to set modification times on directories.
...
Execute the setInterval function without delay the first time
...It's simplest to just call the function yourself directly the first time:
foo();
setInterval(foo, delay);
However there are good reasons to avoid setInterval - in particular in some circumstances a whole load of setInterval events can arrive immediately after each other without any delay. Anothe...
Get the name of an object's type
...quivalent of Java's class.getName()?
No.
ES2015 Update: the name of class Foo {} is Foo.name. The name of thing's class, regardless of thing's type, is thing.constructor.name. Builtin constructors in an ES2015 environment have the correct name property; for instance (2).constructor.name is "Number...
Strangest language feature
...
These let you use the "WTF operator": (foo() != ERROR)??!??! cerr << "Error occurred" << endl;
– user168715
Jan 4 '10 at 21:39
57
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Replace whitespaces with tabs in linux
How do I replace whitespaces with tabs in linux in a given text file?
10 Answers
10
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