stream-processing

I figured out a way to get the (x,y,z) data points for each frame from one hand previously. but im not sure how to do that for the new holistic model that they released. I am trying to get the all landmark data points for both hands as well as parts of the chest and face. does anyone know how to extract the holistic landmark data/print it to a text file? or at least give me some directions as to h

Is your feature request related to a problem? Please describe.
A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]

Currently, ksqlDB causes a full topic scan whenever performing a pull query over a stream. This is inefficient when looking up specific sets of data, but necessary due to how pull queries are implemented over streams.

**Describe the

Describe the bug
For non empty MultiMap I'm always seeing 0 B for Entry memory and Backup memory

For Map I'm receiving the non-zero values.
Here's the MultiMap config:

<multimap name="default">
    <backup-count>1</backup-count>
    <async-backup-count>0</async-backu

For an implementation of #126 (PostgreSQL driver with SKIP LOCKED), I create a SQL table for each consumer group containing the offsets ready to be consumed. The name for these tables is build by concatenating some prefix, the name of the topic and the name of the consumer group. In some of the test cases in the test suite, UUID are used for both, the topic and the consumer group. Each UUID has

I would like to convert a DataFrame to a JSON object the same way that Pandas does with to_dict().

toJSON() treats rows as elements in an array, and ignores the index labels. But to_dict() uses the index as keys.

Here is an example of what I have in mind:

function to_dict(df) {
    const rows = df.toJSON();
    const entries = df.index.map((e, i) => ({ [e]: rows[i] }));
  

Some uses functions build_xx_expr, while some implements TryFrom. They are effectly the same. Using the same style might be better.

Note
Only applicable to single expressions. Not applicable to those functions using macros to build a group of different expreesions.

https://github.com/singularity-data/risingwave/blob/41e17b2a67477fdee5d5a669509771248cab3b0f/src/expr/src/expr/mod

It can be very difficult to piece together a reasonably estimate of a history of events from the current workers logs because none of them have timestamps.

So for that end, I think we should add timestamps to the logs.

This has some cons:

1. We can't just use @printf like we have been until now. We need to either include a timestamp in every @printf call (laborious and error prone) or c

For example, given a simple pipeline such as:

Pipeline p = Pipeline.create();
p.readFrom(TestSources.items("the", "quick", "brown", "fox"))
 .aggregate(aggregator)
 .writeTo(Sinks.logger());

I'd like aggregator to be something requiring a non-serialisable dependency to do its work.

I know I can do this:

Pipeline p = Pipeline.create();
p.readFrom(TestSource

The mapcat function seems to choke if you pass in a mapping function that returns a stream instead of a sequence:

user> (s/stream->seq (s/mapcat (fn [x] (s/->source [x])) (s/->source [1 2 3])))
()
Aug 18, 2019 2:23:39 PM clojure.tools.logging$eval5577$fn__5581 invoke
SEVERE: error in message propagation
java.lang.IllegalArgumentException: Don't know how to create ISeq from: manifold.