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Thread: How to read and insert key and Value in the 3D QMap

  1. #1
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    Default How to read and insert key and Value in the 3D QMap

    I am new Map in QT and have a 3D map like this

    Qt Code:
    1. QMap<const char*, const char*> submap;
    2. QMap<int, submap> map3D;
    To copy to clipboard, switch view to plain text mode 

    Now i inserted valued in it like this, the max of value of int is 5 but for each int value there is 50 key and value for submap.

    1) How can i insert value in map3D. I am doing like this
    Qt Code:
    1. submapD.insert(TempA,TempB);
    2. map3D.insert(count,submap);
    To copy to clipboard, switch view to plain text mode 

    count value will be incremented after TempA and TempB values will be more than 50 values.
    Can anyone tell how i can read it back from map3D?
    Thanks

  2. #2
    Join Date
    Jan 2006
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    Graz, Austria
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    Qt products
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    Default Re: How to read and insert key and Value in the 3D QMap

    If you mean access by key, just chain two calls of QMap::value()

    Qt Code:
    1. const char *value = map3D.value(someInt).value(someCharStar);
    To copy to clipboard, switch view to plain text mode 

    Btw, since you use a low level type (const char*) make sure the pointers stay valid during the life time of the map

    Cheers,
    _

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