Understanding Inner workings of the Golang Channels — A goroutine is a lightweight user-space thread, which is managed by the Go runtime. It executes tasks concurrently, potentially in parallel. A channel is for communication between goroutines. In this post, we will delve into the inner workings of the channel and its send/ receive operations. Making Buffered channels Let’s…

Confusion matrix, Accuracy, Precision, Sensitivity, Specificity, F1 score, and Roc curve, let’s remember them once for all — Despite having seen all these concepts more than a thousand times, I’m still getting confused sometimes. Is there a good way to think about all these concepts so that they start making sense? In this post, I will focus on how to remember them. If you’re not familiar with them…

Redis is an open source (BSD licensed), in-memory data structure store, used as a database, cache and message broker. It supports data structures such as strings, hashes, lists, sets, sorted sets with range queries, bitmaps, hyperloglogs and geospatial indexes with radius queries. Redis is the world’s most popular in-memory data…

Go doesn't support optional function parameters. However, the need for optional parameters will always exist. There are many ways to provide optional parameters to a function in Go, but the most graceful way is to use functional options. Here is what it is and how to implement it. What is Optional Parameter Function An optional…

Recently I have been working on a project that requires me to hack an IOS application. The application makes an API signature to the webserver for every request, and I have to get the signature algorithm. I have tried many tools, but only 3 of them are helpful for me…

You never need a pointer to an interface in Golang! — It is important to follow the Go style guide when programming in Go. This post will focus only one aspect of the style guide, specifically when to use a pointer to an interface. The short answer is: Never use a pointer to an interface. Let’s explain it in more detail…

Use Generic to implement a LinkList data structure — LinkList is a fundamental data structure in computer science. This post shows you how to implement a LinkList from scratch using generics in Golang. The complete code is here. What is LinkNode? LinkNode is the component of a singly linked list, and each LinkNode has a value and a pointer to the next…

Rate Limiting is a way to limit the number of requests within a specific period. It is super helpful when you have many requests and want to reduce load. This post will show you two different algorithms for implementing rate limiting in Python from scratch. Naive Fixed Window Algorithm The most straightforward algorithm to…

Error handling is a fundamental technique in Golang. This post will discuss the error handling code style guide in Golang. Declaring Errors The error built-in interface type is the conventional interface for representing an error condition, with the nil value representing no error. type error interface { Error() string } There are…