4.12.3 Can you answer these questions?

4.12.3.1 Explaining error when using Part inside Module in Dataset

http://mathematica.stackexchange.com/questions/140541/explaining-error-when-using-part-inside-module-in-dataset

 
I have a vague recollection of seen an explanation for this, but I can not find it, so it may be a false memory. Will delete if duplicated. 
 
Let ds be a simple Dataset 
 
ds = Dataset@Table[ 
...
 

- asked by rhermans 4votes

4.12.3.2 Performance-driven approach to using Big Data without killing the hard-drive

http://mathematica.stackexchange.com/questions/140114/performance-driven-approach-to-using-big-data-without-killing-the-hard-drive

 
Situation 
 
A calculation has to be done in which the amount of data is too much to fit into memory. Fortunately, only a part of the overall data set has to be known at a time. The preprocessing is  ...
 

- asked by pbx 7votes

4.12.3.3 Bug with PlotLegends->Placed in GraphicsRow

http://mathematica.stackexchange.com/questions/140539/bug-with-plotlegends-placed-in-graphicsrow

 
Bug introduced in 11.0 and persisting through 11.1 
 
 
 
The FrontEnd of Mathematica 11.1.0 on my Windows 7 box runs permanently at 100% CPU when I execute the following command: 
 
...
 

- asked by RonH 3votes

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