以下成員源於類 QHash 被棄用。 提供它們是為使舊源代碼能繼續工作。強烈建議不要在新代碼中使用它們。
(deprecated in 6.6)
int
|
qGlobalQHashSeed () |
(deprecated in 6.6)
void
|
qSetGlobalQHashSeed (int newSeed ) |
[deprecated in 6.6]
int
qGlobalQHashSeed
()
This function is deprecated since 6.6. We strongly advise against using it in new code.
使用 QHashSeed::globalSeed () 代替。
Returns the current global QHash seed.
The seed is set in any newly created QHash 。見 qHash about how this seed is being used by QHash .
另請參閱 QHashSeed and QHashSeed::globalSeed ().
[deprecated in 6.6]
void
qSetGlobalQHashSeed
(
int
newSeed
)
This function is deprecated since 6.6. We strongly advise against using it in new code.
使用 QHashSeed 代替。
Sets the global QHash seed to newSeed .
Manually setting the global QHash seed value should be done only for testing and debugging purposes, when deterministic and reproducible behavior on a QHash is needed. We discourage to do it in production code as it can make your application susceptible to algorithmic complexity attacks .
From Qt 5.10 and onwards, the only allowed values are 0 and -1. Passing the value -1 will reinitialize the global
QHash
seed to a random value, while the value of 0 is used to request a stable algorithm for C++ primitive types types (like
int
) and string types (
QString
,
QByteArray
).
The seed is set in any newly created QHash 。見 qHash about how this seed is being used by QHash .
If the environment variable
QT_HASH_SEED
is set, calling this function will result in a no-op.
另請參閱 QHashSeed::globalSeed () 和 QHashSeed .