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https://issues.apache.org/jira/browse/ARROW-7513?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17011451#comment-17011451
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Leo Meyerovich commented on ARROW-7513:
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* Good: Updated the numerics section to use `VectorT.from(Array | Buffer)`
** Oddly, arrow.Int64Vector.from((new Uint32Array([2,3, 555,0, 1,0])).buffer)
returns length 6, not 3 (0.15.0)
* Bad:`VectorDictionary.from(['hello', 'hello', null, 'carrot'])` did not seem
to work, so kept as lower-level for now
* Bad: Still not sure how to do structs
> [JS] Arrow Tutorial: Common data types
> --------------------------------------
>
> Key: ARROW-7513
> URL: https://issues.apache.org/jira/browse/ARROW-7513
> Project: Apache Arrow
> Issue Type: Task
> Components: JavaScript
> Reporter: Leo Meyerovich
> Assignee: Leo Meyerovich
> Priority: Minor
>
> The JS client lacks basic introductory material around creating the common
> basic data types such as turning JS arrays into ints, dicts, etc. There is no
> equivalent of Python's [https://arrow.apache.org/docs/python/data.html] .
> This has made use for myself difficult, and I bet for others.
>
> As with prev tutorials, I started sketching on
> [https://observablehq.com/@lmeyerov/rich-data-types-in-apache-arrow-js-efficient-data-tables-wit]
> . When we're happy can make sense to export as an html or something to the
> repo, or just link from the main readme.
> I believe the target topics worth covering are:
> * Common user data types: Ints, Dicts, Struct, Time
> * Common column types: Data, Vector, Column
> * Going from individual & arrays & buffers of JS values to Arrow-wrapped
> forms, and basic inspection of the result
> Not worth going into here is Tables vs. RecordBatches, which is the other
> tutorial.
>
> 1. Ideas of what to add/edit/remove?
> 2. And anyone up for helping with discussion of Data vs. Vector, and ingest
> of Time & Struct?
> 3. ... Should we be encouraging Struct or Map? I saw some PRs changing stuff
> here.
>
> cc [~wesm] [~bhulette] [~paul.e.taylor]
>
>
>
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