Operate on Parts of a Cloud Expression
Cloud expressions support efficient Part operations, evaluated directly in the cloud.
Create a cloud expression to store a scoreboard.
In[1]:=
![Click for copyable input](assets.en/operate-on-parts-of-a-cloud-expression/In_3.png)
ce = CreateCloudExpression[<|
"Alice" -> <|"best" -> 12, "last" -> 3|>,
"Bob" -> <|"best" -> 7, "last" -> 5|>,
"Carlo" -> <|"best" -> 31, "last" -> 12|>|>, "scoreboard"]
Out[1]=
![](assets.en/operate-on-parts-of-a-cloud-expression/O_3.png)
Retrieve the best score associated to both Alice and Bob.
In[2]:=
![Click for copyable input](assets.en/operate-on-parts-of-a-cloud-expression/In_4.png)
ce[{"Alice", "Bob"}, "best"]
Out[2]=
![](assets.en/operate-on-parts-of-a-cloud-expression/O_4.png)
Update both scores of a user with a higher value.
In[3]:=
![Click for copyable input](assets.en/operate-on-parts-of-a-cloud-expression/In_5.png)
ce["Alice", {"best", "last"}] = 24
Out[3]=
![](assets.en/operate-on-parts-of-a-cloud-expression/O_5.png)
Retrieve the whole cloud expression with the updated values and order entries by best score.
In[4]:=
![Click for copyable input](assets.en/operate-on-parts-of-a-cloud-expression/In_6.png)
Dataset[Get[ce]][SortBy[-Part[#, "best"] &]]
Out[4]=
![](assets.en/operate-on-parts-of-a-cloud-expression/O_6.png)