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GC Overhead Limit Exceeded

Bipartite Graph

Hello. In this tutorial, we will understand the GC Overhead Limit Exceeded error in the Java programming language. 1. Introduction Out of memory error in java is a virtual machine error thrown by the java virtual machine when the resources are exhausted. In other words, the error prevails when the virtual machine has spent hours performing the garbage collection but has ...

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The fzf command

1. Introduction When working with the command line, mostly every day no matter what operating system you are using, it is useful to have some tools/plugins that will make your work much easier. Tools and plugins, like fzf, are designed to facilitate your work through just a simple command instead of multiple instructions. Statistically using autocomplete will reduce typing by ...

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Google authentication Nodejs and Passport

Hello. In this tutorial, we will understand and implement the google sign-in integration with the nodejs application using passport and passport-google-oauth2 modules. 1. Introduction Passport.js is an authentication middleware designed for Nodejs. passport-local uses the passport strategy for authenticating with a username and password. The module helps to authenticate using a username and password in the nodejs applications. If you ...

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Javalin REST API

1. Introduction This is an in-depth article related to the Javalin REST API. Javalin is a web framework used by Java and Kotlin developers. The framework runs on Jetty Web server. It is similar to koa.js. 2. Javalin 2.1 Prerequisites Java 7 or 8 is required on the linux, windows or mac operating system. Maven 3.6.1 is required for building ...

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Nodejs Nodemailer example

Hello. In this tutorial, we will understand the nodemailer module in a simple nodejs application. We will set up a fake smtp server (e.g. smtp4dev) for localhost development and understand the package implementation. smtp4dev is an open-source service that emulates an smtp email server for email testing and debugging purposes. 1. Introduction Nodemailer is an npm module used for sending ...

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Docker Copy Files

1. Introduction In this example, we will find out how to use copy files inside Docker. Docker is an open platform for developing, shipping, and running applications. Docker enables you to separate your applications from your infrastructure so you can deliver software quickly. With Docker, you can manage your infrastructure in the same ways you manage your applications. By taking ...

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What is /bin/bash?

1. Introduction Bash is known also as a Unix Shell, and was written by Brian Fox for the GNU Project as a free software replacement for the Bourne shell. The first version was released in 1989 and it was used as a default login shell for most Unix distributions. Currently, the bash is available on Windows 10 via Windows Subsystem ...

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Query in graphql

Bipartite Graph

Hello readers. In this tutorial, we will understand and implement the query in graphql. 1. Introduction GraphQL is an API syntax that defines how to fetch data from one or more databases. It was developed by Facebook to optimize the RESTful api calls. It is a data query and manipulation language for api’s. It is faster, simple, and easier to ...

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Upsert in MongoDB

1. Introduction This is an in-depth article on how to create MongoDB Upsert Example. Mongo Database is a no SQL database. It has capabilities such as query language to retrieve from the database. It also provides operational and administrative procedures. A document in Mongo Database is a data structure that has field and value pairs. These documents are like JSON ...

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Mutations in graphql

Bipartite Graph

Hello readers. In this tutorial, we will understand and implement mutations in graphql. 1. Introduction GraphQL is an API syntax that defines how to fetch data from one or more databases. It was developed by Facebook to optimize the RESTful API calls. It is a data query and manipulation language for API’s. It is faster, simple, and easier to implement ...

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