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https://issues.apache.org/jira/browse/ARROW-7738?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Kouhei Sutou updated ARROW-7738:
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Summary: [JS] Implement list contains predicate (was: Implement list
contains predicate)
> [JS] Implement list contains predicate
> --------------------------------------
>
> Key: ARROW-7738
> URL: https://issues.apache.org/jira/browse/ARROW-7738
> Project: Apache Arrow
> Issue Type: Improvement
> Components: JavaScript
> Affects Versions: 0.15.1
> Reporter: Anders Rune Jensen
> Priority: Minor
>
> As far as I can see there is no way to check if a list contains a specific
> element.
> My code is as follows:
>
> {code:java}
> var all = arrow.Table.new([
> arrow.DateVector.from(dates),
> arrow.Int32Vector.from(flumeseqs),
> arrow.Utf8Vector.from(keys),
> arrow.Vector.from({ values: authors, type: new arrow.Dictionary(new
> arrow.Utf8(), new arrow.Int32()) }),
> arrow.Int32Vector.from(sequences),
> arrow.Vector.from({ values: types, type: new arrow.Dictionary(new
> arrow.Utf8(), new arrow.Int32()) }),
> arrow.Vector.from({ values: links, type: new arrow.List(listChild) }),
> ], ["date", "flumeseq", "key", "author", "sequence", "type", "links"])
> {code}
> And I want to get all the items that has a specific element in the links
> section.
> So something like:
>
> {code:java}
> var q2 = Array.from(
> all.filter(
>
> arrow.predicate.col('links').contains('%GcvjVk+NLsjOB5Vd+vceGXEOeYmHoRA6lgXVJzPuMxw=.sha256')))
> {code}
>
>
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