double stream feed to prevent unneeded memoization?

I'm new to Haskell and I'm trying to implement Euler's Sieve in stream processing style. When I checked the Haskell Wiki page about prime numbers, I found some mysterious optimization technique...

Java Record / Mix two audio streams

i have a java application that records audio from a mixer and store it on a byte array, or save it to a file. What I need is to get audio from two mixers simultaneously, and save it to an audio...

collecting HashMap<String, List<String>> java 8

I want to be able to convert a List to a HashMap where the key is the elementName and the values is a list of something random (in this case its the Element Name). So in short I want (A->List(A),...

Why is my Rust program slower than the equivalent Java program?

I was playing around with binary serialization and deserialization in Rust and noticed that binary deserialization is several orders of magnitude slower than with Java. To eliminate the...

How can I paginate a merged collection in Laravel 5?

I am creating a stream which contains two types of objects, BluePerson and RedPerson. To create the stream, I fetch all of both objects, then merge them into one collection. After doing so, I need...

Merge Map<String, List<String> Java 8 Stream

I would like to merge two Map with JAVA 8 Stream: Map<String, List<String>> mapGlobal = new HashMap<String, List<String>>(); Map<String, List<String>> mapAdded = new HashMap<String,...

How can I merge multiple Streams into a higher level Stream?

I have two streams, Stream<A> and Stream<B>. I have a constructor for a type C that takes an A and a B. How do I merge the two Streams into a Stream<C>?

Webpack frozen during '91% additional asset processing'

I've recently added a great UI library called 'Antd' to my project. https://ant.design/docs/react/introduce It worked flawlessly in my dev environment and I've implemented a lot of components into...

npm install with error: `gyp` failed with exit code: 1

I am try to install modules on Windows 10 using npm 5.6.0. When I enter npm install I get: gyp ERR! configure error gyp ERR! stack Error: `gyp` failed with exit code: 1 gyp ERR! stack at...

How to repair after git rebase was interrupted

I am trying to merge branch feedback with master, using "git checkout feedback" and "git rebase master". While performing the rebase, the computer power turned off, interrupting the process. Now...

Yii2: Application can't be executed. Apache shows "Index of"

I developed a Yii2 application that works in my computer with Debian. Then I installed Bitnami WAPP in a computer with Windows 8 and I tried to execute it but it doesn't work. It shows the content...

How to merge two streams in Java?

Suppose we have two streams as follows: IntStream stream1 = Arrays.stream(new int[] {13, 1, 3, 5, 7, 9}); IntStream stream2 = Arrays.stream(new int[] {1, 2, 6, 14, 8, 10,...

How to change video speed only while adding a same-speed separated audio stream with ffmpeg?

I'm using ffmpeg for video filter. But, When I changed video speed, that time I got issue Audio is longer than video : ffmpeg -i INPUT.mp4 -filter:v setpts=0.5*PTS -shortest -y -preset ultrafast...

Merge two separate Angular project to one URL on apache server

I have two different projects in Angular (one is in version 6, other in 7) and each project has own routing module. I must merge them into one domain url. To be clear I must do in that...

ffmpeg concat video size smaller than original videos

I'm trying to merge multiple videos using ffmpeg but the output of concat is half the size of original videos. Below is the ffmpeg command, ffmpeg -f concat -safe 0 -i input.txt -c copy...

Does Merging two kafka-streams preserve co-partitioning

I have 2 co-partitioned kafka topics. One contains automatically generated data, and the other manual overrides. I want to merge them and filter out any automatically generated data that has...

Snowflake Stream became empty, even if we consume only few records from Stream data

I am seeing that stream dataset became empty even if I consume only one record from stream dataset. I dont think it is correct. These are the steps I did. -- Create a table to store the names and...

Perforce stream merge wants to delete files

I am using perforce and I'm merging a parent stream down into a child stream. The child stream contains files that the parent stream does not (and should not yet). When I merge, it's telling me to...

How to merge multiple observables with order preservation and maximum concurrency?

I searched for a duplicate and didn't find any. What I have is a nested observable IObservable<IObservable<T>>, and I want to flatten it to a IObservable<T>. I don't want to use the Concat...

Weird behaviour of Stream in Snowflake

This is regarding streams on a table that is getting emptied even though I am making sure of "on" condition is matching the 1:1 row in the source and target table. Here is an example: I have a...

Log entries lost while using fluent-bit with kubernetes filter and elasticsearch output

From time to time we find that some logs are missing in the ES, while we are able to see them in Kubernetes. Only problems in logs I was able to find, point out to a problem with the kubernetes...

Dart add new Stream to stream group

I want to make several periodic REST API calls and merge all the responses into one single stream. This is possible with StreamGroup, but is it possible to merge a new stream to the already...

Processing upserts on a large number of partitions is not fast enough

The Problem We have a Delta Lake setup on top of ADLS Gen2 with the following tables: bronze.DeviceData: partitioned by arrival date (Partition_Date) silver.DeviceData: partitioned by event date...

Eclipse TestNG java.lang.AssertionError

My code works, TestNG works, I got results as expected, but this error appears at the end of TestNG results: Error screenshot Error code: java.lang.AssertionError: Couldn't find resource:...

Pub/Sub to BigQuery (Batch) using Dataflow (Python)

I created a streaming Dataflow pipeline in Python and just want to clarify if my below code is doing what I expected. This is what I intend to do : Consume from Pub/Sub continuously Batch load...

How to get new/updated records from Delta table after upsert using merge?

Is there any way to get updated/inserted rows after upsert using merge to Delta table in spark streaming job? val df = spark.readStream(...) val deltaTable = DeltaTable.forName("...") def...

Webpack dev server - DeprecationWarning: Using 'compiler' as the first argument is deprecated

I upgraded from webpack dev server 3.11.2 to 4.4.0 and I get these deprecated warnings on npm run dev: "dev": "webpack serve --config webpack.dev.js", (node:33156)...

Haskell need help understanding stream

I have this code where these functions have been made: creates an infinite list out of the given stream; creates a stream for the given iteration function and the starting stream element...

ffmpeg combining audio and video error: could not find codec parameters

I have downloaded two files using pytube from Youtube. One is audio file .webm extension. While the is adaptive stream 8k video with .mp4 extension. I have to combine audio with videos more than...

Deserialize JSON list of hex strings as bytes

Iʼm trying to read a JSON stream, part of which looks like "data": [ "c1a8f800a4393e0cacd05a5bc60ae3e0", "bbac4013c1ca3482155b584d35dac185", "685f237d4fcbd191c981b94ef6986cde", ...

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