diff options
| -rw-r--r-- | src/corelib/doc/src/containers.qdoc | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/src/corelib/doc/src/containers.qdoc b/src/corelib/doc/src/containers.qdoc index fa26409d83..6017269272 100644 --- a/src/corelib/doc/src/containers.qdoc +++ b/src/corelib/doc/src/containers.qdoc @@ -578,9 +578,11 @@ \snippet code/doc_src_containers.cpp 18 With QMap and QHash, \c foreach accesses the value component of - the (key, value) pairs. If you want to iterate over both the keys - and the values, you can use iterators (which are fastest), or you - can write code like this: + the (key, value) pairs automatically, so you should not call + values() on the container (it would generate an unnecessary copy, + see below). If you want to iterate over both the keys and the + values, you can use iterators (which are faster), or you can + obtain the keys, and use them to get the values too: \snippet code/doc_src_containers.cpp 19 |