Iteratee fundamentals for the beginer
Iteratees are an alternative to commonly prevalent, imperative blocking IO. While reading from a stream, if is data is not available - the reading thread blocks - which is not desirable. The alernative...
View ArticleScala for the uninitiated java developer: 22 scala things you may not have known
Scala's popularity is rising among developers. Yet, many java developers have hardly paid any attention to it - thinking it is some sort of esoteric programming langauge isolated from the java main...
View ArticleRecovering from scala delimited continuation encounter
As I have said before, delimited continuations are wild beasts. Its one of those things that bends and hurts the mind. You might have to spend months in a state of delirium trying to figure them out!...
View ArticleFun with scala's for comprehension: Solving sudoku in 11 lines!
Scala's for loop(comprehension) may look deceptively similar to java's for loop, but it is much more powerful than java's for loop. While java's for loop is just to repeat some computation for...
View ArticleThe essence of a monad
Many people when they encounter the term 'monad' for the the first time, they decide to look it up, at least the curious bunch. But when they do consult the blogs, articles, Wikipedia, haskell...
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Back propagation in neural network training
Back propagation is one of the fundamental building blocks of many neural network models in use today. As always, Andrej Karpathy does a fantastic job explaining how it is calculated and applied during...
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Kubernetes Secrets in plain English
Want to get a high level view of kubernetes secrets? Read on...
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Install PySpark on windows
Install java and expose JAVA_HOMEInstall spark and expose SPARK_HOMEInstall findspark:Launch jupyter lab and use pyspark in notebook:
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Quick sort routine in rust
A quick sort routine in rust:Source: https://github.com/ratulb/algos_in_rust
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Algorithms and data structures in rust - mergesort
Bets about rust are turning out to be right. Initially proposed as system programming language(read servo - rewrite of firefox browser) - numerous front end web frameworks are appearing and becoming...
View ArticleExploring envoyproxy
With the adoption of micro-services, we need to tackle hosts of issues associated with remote calls and networking - because what used to be an in-process function call now becomes a RPC call that need...
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Nested virtualbox VM inside google compute engine
Though guest VM inside google compute engine raises concerns about performance, there are situations where they prove useful. In this post I am going to discuss how we can install a ubuntu guest VM on...
View ArticleNFS persistent volume and claim in kubernetes
This write up shows detailed steps of how to setup a nfs server as a storage backend and make use of it in POD's persistent volume via persistent volume claim. These have been tested to work with...
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Kuberenetes cluster on Openstack on a google compute engine
In this post we will deploy a kubernetes cluster on Openstack which itself is deployed on one single GCP compute engine. Provisioning the compute engine: Not all compute engines support virtualization...
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Migrate kubernetes embedded etcd to external etcd - easy back and forth switch
Precursor: How easy is it to setup a single master kubernetes cluster? Quite easy. Might take in the range of 5 to 10 minutes - maybe.How about multi-master cluster? We would need to front the API...
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Algorithmic Muscle Excercise - Rain Water Trapping Problem In Rust
Water trapped along continuous extent of buildings of different heights: Source: https://github.com/ratulb/algos_in_rust/blob/master/rain_water_trapping/src/lib.rs
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Algorithmic Muscle Excercise - maximum subsequence length in rust
Maximum sub-sequence length of 3 strings - bottom up approach: Source: https://github.com/ratulb/algos_in_rust/blob/master/max_sub_sequence_bottom_up/src/lib.rs
View ArticleLinus Torvalds on rust in linux
https://www.zdnet.com/article/linus-torvalds-on-where-rust-will-fit-into-linux/
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grpc connect — rust, java and grpc-web
Gist: Route calls from browser(using grpc-web) to rust grpc application(implemented using tonic), which in turn delegates to java grpc and vice versa.Note: We use latest versions of various...
View ArticleVPC native kubernetes cluster in GCP
VPC native k8s clusters have quite a few advantages:POD IPs are directly routable. This eliminates the need for a load balancer to hop from node to pod. Instead traffic can reach PODs directly...
View Articlescala xml wrapper utility
XDoc is a utility wrapper over scala.xml.Elem. It's simplifies xml processing. Following needs to be considered while using this utility:1) It does not support namespaces. That can easily incorporated...
View ArticleAsynch concurrency: In the promised land of scala futures
The basics:The concept of future is not new - java added them in 1.5 -scala actors had futures from the start, lift webframework had its own futures. As more and more libraries and toolkits sprang up...
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Rust counter program and client on solana
https://github.com/ratulb/solana_counter_program
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