Forum Discussion
Problem using "d3-array".rollup (and it spread argument) in a Power BI Custom Visual
Hi Schizzomarino ,
Sorry, but I took a shot before trying it myself. But if I change the key attribute to ...key: any[] I can get your code working.
I do realise that the typing are a bit off now, but looks like TypeScript doesn't work correctly with this type of parameter binding.
But the most important thing: it compiles!
-JP
Hi Daniel dm-p ,
thanks for the reply. The reasons I don't do the grouping with dataViewMapping:
Reuse: The pbiviz libraries change so much with every new version, I prefer using d3's latest v5 version so I can reuse it in future projets while updating to the newest and best pbiviz library.
I would like to know how to remove limitations that d3V5 encounters in Power BI.
Many objects are needed as to animate the visual: This is only one of the many data munching processes I need to do, including ranking the data and creating before and after snapshots for animation. I fear using dataViewMapping would be a lot more complicated than 4 lines of code in d3.
Finally, I will be using this also on standalone webpage visualisations (to embed directly with data within webpages, with no Power BI) and would much rather use the same processes within the custom visualisation.
The output I am looking for here is an array of arrays, with the deepest arrays made up of a map (the original data:
[{"date":36526,"name":"Coca-Cola","category":"Beverages","value":72537},{"date": 36526,"name": "Microsoft","category": "Technology", "value":70196},...]
Should become, this (consider the date formatting here is of no consequence):
Thanks in advance for any guidance you may be able to provide
Dan