Question

I have a QHash<QString,QString>.
I use the following expression to check whether a value is there in the QHash::keys() or not.

//programme
QHash<QString,QString> samplehash;
QString value = "somevalue";
if(samplehash.contains(value)) // Condition - 1
{
 //some code
}

Sometimes the above conditions matches, sometimes not for the same letters of different case. Is the QHash::contains method case-sensitive?

Answer 1

QHash.contains() is case sensitive as John T mentioned. Without the code there is not much to figure out. You can imagine it doing a == between the keys.

Please do not forget that accessing a non existent element via [] will create an empty entry in the hash, this might be what causes your bug. contains does not insert an entry into the hash, neither does value