Blog

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Selenium - Execute POST request asynchronously

One might feel limited in Selenium being unable to verify certain things that interacts through XHR Ajax Requests especially when they are http POST calls. This could be applicable when you are trying to crawl a particular website and you are not able to get a certain datapoint because it is hiding behind a XHR Post in the page.

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Postgres Common Table Expressions

Common Table Expressions (CTE), also known as the WITH clause, is an awesome feature that helps in breaking down big queries into smaller queries which makes the whole query more readable and easier to maintain.

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Performance improvement with Rails API

We recently published Trending Tech News on both Apple App Store and Google Play store. It is best used for consuming tech news from the best news publishers in the world.

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Enhance images with Autoencoders

Autoencoders are a type of artificial neural network that can learn how to efficiently encode and compress the data and then learn to closely reconstruct the original input from the compressed representation.

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How to serve your Website from AWS S3 using Terraform

As the title mentions, I will show you how to create a website and serve the static contents using AWS S3 in a much simpler way. For this, the prerequisites are,

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Edit live video background with WebRTC and TensorFlow.js

With many of us working from home due to recent COVID-19 pandemic, there is increase in usage of video conferencing apps like Microsoft Teams and Zoom.

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Deep and Shallow copy in Javascript.

First, there are two types of data types primitive data types and reference data types. Primitive data types are (boolean, byte, char, short, int, long, float and double) and reference data types are (Array and Object)

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ASP.NET Core basic Authentication & Authorization in Razor Pages with PostgreSQL

This blog is a basic walkthrough to setup ASP .NET Core basic Role-based Authentication using Identity and Authorization, with Postgres as database. Here I am going to use the Razor pages approach rather than MVC. To get going you need to have ASP.NET Core, Visual Studio and Postgres DB. If you have all of the above you are ready to go.

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Time series prediction with Tensorflow and Keras

It’s always fascinating to see how the neural networks pull off amazing results, but even for them, it's not easy learning sequential/time-series data. The time component adds additional information which makes time series problems more difficult to handle compared to many other prediction tasks.

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Selenium with BrowserStack

Web applications are developed with a number of components that involve JavaScript, JQuery, AJAX and a lot more. All may not behave the same way in different browsers available and hence it is important for us to test the application in different browsers which is both resource and time-consuming.

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Face verification with Azure Face API

I have recently got a requirement to verify two images and see if both the images have the same person in it. This looks very interesting and there are few open source libraries doing this with decent accuracy. In order to get better accuracy I thought it can be dealt with CNN and started to think about implementing Siamese CNN to solve this problem. Then I saw this Face API from Azure which is doing exactly this task with better accuracy and it comes in the free tier as well.

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Debugging CPU & Memory usage in Rails app

For the past few weeks, we were facing issue with the digital ocean machine hitting more than 90 % CPU limit for 5 mins continuously (We have set up monit to trigger a notification to our Telegram channel for it) and it is really annoying to see these many messages in telegram,

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