typeerror - calcExtents must be an Array

[mraghuram]

Hi,

I keep getting this error message that says 'TypeError: The first argument of calcExtents() must be an array.'

However my data I am passing passes the Array.isArray test and is an array of objects

Is there something I am missing?

Murali

[mhkeller]

Can you make a reproduction of the error in the svelte REPL or a GitHub repo?

[mhkeller]

@mraghuram please let me know. I'll close this issue if you've moved on.

[mraghuram]

hi @mhkeller, sorry I am trying to figure out how to share the information. The data i am using is something I can share on a repl.

I used d3 extent as a work around for now.

[mhkeller]

Okay, let me know if there's a way I can take a look somehow. I'll close this for now and feel free to re-open when you are able to share.

[mhkeller]

@mraghuram Here's a link to the REPL where you can log in with GitHub and create a shareable link: https://svelte.dev/repl/hello-world?version=3.44.3

[tututwo]

hi @mhkeller, sorry I am trying to figure out how to share the information. The data i am using is something I can share on a repl.

I used d3 extent as a work around for now.

Hi @mraghuram, I ran into the same problem just yesterday. You can replicate the same issue by deleting {flatData} in this demo map.
https://layercake.graphics/example/MapSvg

Yesterday I passed in zDomain, zRange and z to component, but I cant use zGet or zScale in the descendent component. I guess adding {flatData} lets LayerCake's z accessor know extents of the data?(But how? sorry...more question here...)

[mhkeller]

@tututwo these are two different issues. The map example needs flatData because the value for data is a GeoJSON object, not an array, which the calcExtents function requires. In order to generate scales, Layer Cake needs an array of objects and accessor functions to know which field to use as each scale's domain.

@mraghuram's issue was different. He said he was passing in an array to the data prop and still seeing the error. Hope that helps to clarify things. I wonder if renaming flatData to something like dataForExtents would be more helpful.

[tututwo]

Thank you for your explanation! It's clear for me now!

And yes, dataForExtents is more intuitive for me, personally.

[mraghuram]

@mhkeller sorry about the delay.. Unfortunately, I couldn't share the data. But thanks for closing the issue

[mhkeller]

Okay. Try calling Array.from around your data to make sure that it is actually an array.