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Questions tagged [multikey]

78 questions
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Updating value of particular keys in MultiKeyMap in Java

I was trying to update the values of set of particular keys in MultiKeyMap in Java but not able to get how to do that. Suppose I want to update (key1, key2, value1) same set of key with different value (key1, key2, value2). If I simply perform put…
Masoom Raza
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Python access value for a single key in a multi key dictionary

I have a DataFrame and tried to change the dtype. I can do it like this: #Example ds = ds.astype({'Breite':float,'Hoehe':float,'Tiefe':float,'vol':float,'Anzahl':np.int64},axis = 1) I was wondering if I can shorten the dict a bit to have it more…
Hank Gordon
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Java multikey map with no value

I would like to be able to query on each key with no value. A1...n , B1...n are Strings. I have Sets of Strings which I need to add into structure in order to be able to query on each String and get its group Strings. For example : {A1, A2, A3} ,…
userit1985
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laravel manyToMany multikey

I have four tables quotation id item id quotation_id article article_id quotation_id articleItem pivot_item_id pivot_article_id either articleItem have more columns and i need right syntax of manyToMany relation between item and article at…
Petr Kamen Spinar
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How to ensure all objects of an array are unique among documents in MongoDB

We have a requirement for identifying (and avoid) duplicate records, which are contained inside of an Array of a parent document, ie: { _id: 1, item: "abc", stock: [ { size: "S", color: "red", quantity: 25 }, { size: "S", color:…
Neoluis10
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Appending map that uses Struct as a "multikey" and std::vector as mapped value

in code below it appends myList only for the first call of appendMyList(), and size stays 1, so can someone explain what is wrong here: struct MyKey { int accValue; std::string name; }; inline bool operator<(MyKey a, MyKey b){ return…
Bodega
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Replace conditional logic with strategy pattern

I have a long conditional logic.Wanted to have an efficient way to do so. (city, country) match { ("USA","NewYork") => someVal=1.0 ("USA","SomeOther")=> someVal =2.0 .... } I have this look-up logic inside of loop, how do I cleanly do it.May be a…
HDev007
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How mongodb sorts the documents when an object is used as an index?

If every document has an array of objects, let say : hobbies:[ { "title": "Swimming", "frequency": 4 }, { "title": "Playing", "frequency": 3 } ] and I use hobbies as an Index, then how all the…
Dev_spidey
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Nested Map or multi-key example Chronicle Map

I have a use case where I want to create a co-occurrence matrix. Essentially it is going to be something like Map>. I wish to use Chronicle-Map for this task. I checked Multimaps in ChronicleMap and…
graphEnthusiast
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How to create a new column in a dataframe using a multikey dictionary

I have a multikey dictionary that I would like to use to create a new column in a dataframe. Doing so with a single key dataframe is quite easy but I am stumped as to what the correct syntax is to send two values to the dictionary. I have been able…
29Clyde
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Python3 - Access multikey dict with single key

I want to map a timestamp t and an identifier id to a certain state of an object. I can do so by mapping a tuple (t,id) -> state_of_id_in_t. I can use this mapping to access one specific (t,id) combination. However, sometimes I want to know all…
Aydo
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mongodb multikey index seems like not being used when sort

Let's assume that I have tx_collection which has 3 documents like below { "block_number": 1, "value": 122 "transfers": [ { "from": "foo1", "to": "bar1", "amount": 111 }, { …
obanadingyo
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Mongodb multikey index doesn't work properly

I have a multikey index on an array field for a collection. When I query the collection with an $elemMatch for the field the query is very slow despite of the index. So I did and explain and the index bounds seems to be incorrect. I have mongoDB…
Javaddict
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Joining two different datasets using multiple keyvalues

I have two sets of data. The first dataset looks like: Storm_ID,Cell_ID,Wind_speed 2,10236258,27 2,10236300,58 2,10236301,25 3,10240400,51 The second dataset looks like:…
Sami
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EME Conformance Tests - WidevineH264MultiMediaKeySession

For [2018]EME Conformance Tests - v20171221 WidevineH264MultiMediaKeySession I find this test for 8 times Initialize & 8 times GenerateKeyRequest for Key So I can get 8 times provisioning message for key license. But the Test's success situation is…
Jackie Sun
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