Thanks, Paul! I'll use pre-release. For my own edification I'll take a look at builder implementation.
Thanks! Jenny Get BlueMail for Android On Jun 21, 2019, 02:51, at 02:51, Paul Taylor <ptaylor.apa...@gmail.com> wrote: >Hi Jenny, > >In the 0.13 you have to pre-allocate the null bitmap and data buffers >ahead of time, then use `vec.set(idx, val)` to write each value in. > >In 0.14 you can instead use the new Builders from PR #4476 ><https://github.com/apache/arrow/pull/4476>. These will create and >resize the underlying buffers as you append values, and includes >chunking and streaming APIs for convenience. You can use them by >pointing npm to my github repo like I did here ><https://github.com/trxcllnt/csv-to-arrow-js/blob/2c625fb4b47a84044d62710f63c139a054281d83/package.json#L12> > >if you don't mind using a prerelease build until 0.14 is out. > >Best, >Paul > >On 6/20/19 7:03 PM, Jenny Kwan wrote: >> Apologies if this has been discussed before. I'm attempting to create >Arrow files in an Electron desktop app using JS. I can't find docs >showing how to create a RecordBatch with a column of, say, nullable >bools. Using Table.from and Table.new both keep coercing nulls to >falses. Any pointers? >> >> Thanks, >> Jenny >> >> Get BlueMail for Android
