[jira] [Updated] (ARROW-7738) [JS] Implement list contains predicate

["Kouhei Sutou (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/ARROW-7738?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Kouhei Sutou updated ARROW-7738:
--------------------------------
    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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