Problem using "d3-array".rollup (and it spread argument) in a Power BI Custom Visual

Question

Hello to you all,I am hoping someone will have a solution for a problem I have encountered using "d3-array" in a custom visual for Power BI.I have been using d3 v5 as it's got really nice data munching functions that keep my code clean and give good performance; but some of these are now giving me trouble: the rollup function from "d3-array" in particular. Here a description of my situation:&nbsp;After importing d3 and rollup from d3-array (as rollup), and installing the typescript definitions, when I try to use rollup with two keys, i.e.:Array.from(rollup(data,&nbsp;([d])&nbsp;=&gt;&nbsp;d.value,&nbsp;d&nbsp;=&gt;&nbsp;+d.date,&nbsp;d&nbsp;=&gt;&nbsp;d.name))I get the following error for the above line: "Expected 3 arguments, but got 4"If I remove the second or first key the above works, but then I don't get the Map I am looking for and would have liked to keep the above code as it is just so clean...&nbsp;A small part of the data for clarity:[{"date":36526,"name":"Coca-Cola","category":"Beverages","value":72537},{"date": 36526,"name": "Microsoft","category": "Technology", "value":70196},...]Any typescript advice on how to get this to work?Notes:Rollup takes arguments in this form:&nbsp;(values,&nbsp;reduce,&nbsp;...keys); so that keys can be multiple.&nbsp;This works perfectly fine in a standard web page with the same d3 and d3-array libraries.Thanks in advance for any advice on the aboveDaniel

schizzomarino · Accepted Answer

I have just realised I put this in the wrong place (should be within "Custom Visuals Development Discussion"So I will duplicate this there, sorry... I am a newbie to the board

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Problem using "d3-array".rollup (and it spread argument) in a Power BI Custom Visual

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Problem using "d3-array".rollup (and it spread argument) in a Power BI Custom Visual

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