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Postgres and Graphql

Bipartite Graph

Hello readers. In this tutorial, we will bring in the postgres (running as a Docker container) to integrate with graphql and implement the CRUD operations. The application will expose different endpoints with the help of the apollo server. 1. Introduction GraphQL is an API syntax that defines how to fetch data from one or more databases. It was developed by ...

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Command Not Found Using Sudo

1. Introduction This is an in-depth article related to the Sudo command in Linux and how to avoid command not found error. Sudo is super user do command . It is used as a prefix for superuser commands to be executed. The privileges while executing will be of superusers. In windows, the equivalent is run as administrator. sudo permission is ...

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No such file or directory Error

1. Introduction When you run commands, sometimes part of the command is incorrect or the command is unable to execute the action. In case of unexpected behavior, an error will arise, like “No such file or directory Error”. Most of the time the errors should be self-explanatory for the problem of the executed command. In Linux, when you run some ...

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Apollo server in express js

Hello readers. In this tutorial, we will implement the Apollo server in graphql and express js. Apollo server is an open-source graphql server and works with many nodejs http frameworks or can run its inbuilt express server. 1. Introduction GraphQL is an API syntax that defines how to fetch data from one or more databases. It was developed by Facebook ...

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Convert CSV to Json using Java

1. Introduction A comma-separated values (CSV) file is a delimited text file that uses a comma to separate values. Each line of the file is a data record. Each record consists of one or more fields, separated by commas. The use of the comma as a field separator is the source of the name for this file format. A CSV ...

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How to Install AWSCLI?

1. Introduction Amazon was founded in early 2000, prior to this experience with building Mercant.com, which offers e-commerce as a service platform for third-party retailers. AWS stands for the acronym Amazon Web Service. This provides on-demand cloud computing platforms and API. The platform offers a model plan for these services called Pay-as-you-go, which is a fee of combination: usage, hardware, ...

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Express-js and graphql

Hello readers. In this tutorial, we will implement GraphQL with express-js. 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 It follows ...

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Download and Install Spring Tool Suite(STS)

1. Introduction When developing web services with Spring or Spring-Boot, it will be helpful to have a tool to easily start up a new service just from one click away. This will provide world-class development support for Spring applications. It has a deep knowledge of Spring built-in. Spring Framework provides a comprehensive programming and configuration model for Java-based enterprise applications ...

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Nodejs and graphql

Hello readers. In this tutorial, we will implement GraphQL with nodejs and focus on creating a hello world application. 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 ...

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How do we use find -exec?

1. Introduction In this article, we will see how the find -exec Linux command is used. Find command is used -exec argument in Linux to find the files with different extensions in the directories. 2. Linux Find command and exec option Find command in Linux has expression and action. The expression part is the first one that is used for ...

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