triemap | Java port of a concurrent trie hash map implementation | Natural Language Processing library
kandi X-RAY | triemap Summary
kandi X-RAY | triemap Summary
This is a Java port of a concurrent trie hash map implementation from the Scala collections library. It used to be an almost line-by-line conversion from Scala to Java. These days it has been refactored to be Java 8 friendly and make some original assertions impossible via refactoring.
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Top functions reviewed by kandi - BETA
- Completes GCAs complete .
- Compute size .
- Reads an Equivalence .
- Reads in an INode .
- Remove an entry from the main list .
- Returns the entry with the specified key .
- Compute the hash code for a given object .
- Remove a value from the root .
- Checks if obj is equal .
- Throws an exception if the given object is null .
triemap Key Features
triemap Examples and Code Snippets
Community Discussions
Trending Discussions on triemap
QUESTION
Problem: I am trying to solve a problem where I need to schedule for every x minutes, I need to update the cache and concurrent gets are possible.
Solutions tried:
- Using TrieMap and ScheduledThreadPool Executor With Cats Effects:
I actually started with using TrieMap as it provides thread safety and used scheduled thread pool for scheduling the update
...ANSWER
Answered 2021-Feb-17 at 19:50For the second approach, you can make it simpler by not forking a Fiber in scheduleAndPopulate and keepPollingUsingFiber. Instead, keep the recursive call, and fork them in the caller. IO is stack-safe, so the recursive call won't blow up the stack.
You could use start to fork each, but it might be simpler to parTupled them. It's a variation of parMapN that forks each effect and gathers their results.
(Also, in your code you don't need to pass the implicit values, like cs, explicitly, the compiler will infer them for you.)
QUESTION
I have an actor which is calling a websocket and updating a map everytime it receives an update form the web socket. the same map is being used by the actor at another point in the command.
...ANSWER
Answered 2020-May-30 at 09:49You should do as much processing as possible in the receive method. So rather than updating the map directly in onResponse, send yourself a message and update the map when you receive it:
QUESTION
Goal
I have a mutable Map[Long, Long] with millions of entries. I need to make many iterations of updates with millions of updates. I would like to do this as fast as possible.
Background
Currently, the fastest method is to use a single threaded mutable.LongMap[Long]. This type is optimized for Long types as the key.
Other map types appear to be slower -- but I may have implemented them incorrectly as I was trying to do the updates concurrently and/or in parallel without success. It is possible that updating a map in parallel is not actually occurring or is not possible in Scala.
In order of fastest to slowest:
- LongMap[Long] (from above)
- TrieMap[Long, Long]
- ParTrieMap[Long, Long]
- HashMap[Long, Long]
- ParHashMap[Long, Long]
- ParMap[Long, Long]
It is OK if a faster method is not mutable, but I do not think this will be the case. A mutable map is probably best for this use case.
Code to generate test data and time the test
...ANSWER
Answered 2019-Oct-18 at 13:31If you are not limited to use only Scala/Java maps than for exceptional performance you can peek 3rd party libraries that have maps specialized for Long/Long key/value pairs.
Here is not so outdated overview of such kind of libraries with benchmark results for Int/Int pairs.
QUESTION
I have an immutable Map that I wanna convert to TrieMap. I tried:
...ANSWER
Answered 2019-Jul-31 at 21:35Try
QUESTION
What I'm asking is how to get hold of the Default Scala Play BodyParser implementation in 2.6. However, if you know a cleaner way to solve this use-case I'm more than happy to hear it.
Some preamble ... I reused a Java Play framework Play-Authenticate (PA) to build a Scala Play application on top. Yes crucify me for it! I wanted all the social authentication functionality but have my application in Scala and use e.g. Slick. Yes yes I could try rewriting PA in Scala but no time now ... thinking about it though.
Now that this is out of the way, here is my use case. I have Scala controllers and need to pass Java Context to the PA framework to be able to use it. I also need to check whether the user can be cookie-authenticated, namely whether the user checked the "Remember Me" box when she logged the first time. This "solution" used to work before migrating to Play 2.6 but now doesn't work because of the BodyParser.
This is what the "burger" looks like. I want to eat it so ... I need to authenticate the user by checking the incoming cookie but while at it a Java Context is created (to interoperate with PA). But since I have the dreaded Java Context I can make it available throughout the Scala Application in the scope of one request:
...ANSWER
Answered 2019-May-10 at 12:08I found a solution or potentially the solution?
First by changing the object WithJContextSupportAction's apply method to include play.api.mvc.PlayBodyParsers as implicit parameter:
QUESTION
So I am finalizing my program where the test goes through a list of words in a test program and using prefixes, I weed through it and only return the ones matching.
Here is the following code for my contains method and snippets of the testing method, I am just wondering what am I doing wrong?
//contains method
...ANSWER
Answered 2019-Apr-06 at 22:26Issue is with this line
QUESTION
I'm trying to hook-up an Apache Spark Structured Stream to a MQTT topic (IBM Watson IoT Platform on IBM Bluemix in this case).
I'm creating the structured stream as follows:
...ANSWER
Answered 2018-Oct-27 at 10:23It seems your issue is because you are re-using the same client ID for subsequent connections
QUESTION
I'm struggling with the absence of Java's Iterator.remove() in Scala. In particular, I want to, in a single pass over a large mutable map, remove elements that satisfy a predicate and collect them in another mutable map.
Here's what I am trying to do:
...ANSWER
Answered 2018-May-01 at 20:25An idiomatic way to approach this is to use filterNot() / filter():
QUESTION
I have one problem in Apache Spark GraphX, i tried to partition one graph with this method in the main:
...ANSWER
Answered 2017-Dec-06 at 16:24partitionBy, like many Graph functions, is a lazily-evaluated operation that generates a new Graph object, but doesn't actually compute that Graph until it's necessary - i.e. until some action is performed on the result (e.g. counting, persisting, or collecting it).
Using a simpler example we can see that if we act on the result, these prints will be visible:
QUESTION
I have this:
...ANSWER
Answered 2017-Dec-07 at 12:51Here is one way how to do this in a 2-step way:
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
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No vulnerabilities reported
Install triemap
You can use triemap like any standard Java library. Please include the the jar files in your classpath. You can also use any IDE and you can run and debug the triemap component as you would do with any other Java program. Best practice is to use a build tool that supports dependency management such as Maven or Gradle. For Maven installation, please refer maven.apache.org. For Gradle installation, please refer gradle.org .
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