append vs. << for QStringList

[ce_nort]

Newbie understanding question. I'm using QStringList as an example, but it's kind of a general question.
If I have a QStringList that I want to populate, I can do:

QStringList myList;
myList << "String1" << "String2";

QStringList myList;
myList << "String1" << "String2";

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Or I can do:

QStringList myList;
myList.append("String1");
myList.append("String2");

QStringList myList;
myList.append("String1");
myList.append("String2");

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Obviously the first one is more concise, but is there any behind the scenes benefit to one approach or the other? When would I use one vs the other and why?

[wysota]

They are equivalent.

[anda_skoa]

Those are basically equivalent, the operator<<() approach is just for added convenience in case you want to add multple entries.

It also can be used for things like on-the-fly creation of a QStringList

void someFunction(const QStringList &list);
 
// pass a list without creating a local variable first
someFunction(QStringList() << "a" << "b");

void someFunction(const QStringList &list);

// pass a list without creating a local variable first
someFunction(QStringList() << "a" << "b");

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Cheers,
_