The HTTPS server in Node.js can be created using the HTTPS default module. HTTPS servers provide additional security by encrypting data that is being transmitted from a server to a client, plus it uses SSL/TLS certificates to verify the client. If you want to create a website using Node.js, HTTPS also helps you with SEO […]
Node HTTPS Module: Creating an HTTPS Secure Server in Node.js Read More »
The distinct() function in MongoDB is used to retrieve distinct values. However, it has a problem. This function is a very basic function, it can only select distinct values for one field at a time. So, if there is a need to retrieve the complete set of records matching a specified query, it cannot be
Distinct Aggregation in MongoDB – An Easy Guide Read More »
In this article, I will explain how to use mappings inside structs in Solidity. This guide will explain what are mappings in Solidity and how to use them structs. We will also learn what structs are in the world of Solidity. Let us get started with our guide right away. What are Mappings in Solidity?
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Node.js can use a Date object that provides information about a timestamp. This object can be used for various purposes such as getting the current time, comparing dates, formatting dates, reminders, etc. Date objects represent a specific point in time and are independent of the platform they are being used on. The date and time
Get the Current Timestamp in NodeJS – Multiple Easy Methods Read More »
MongoDB aggregation allows developers to perform complex operations while working with data stored inside a collection of a MongoDB database. One of the operations is the “group by” operation, i.e. $group, which is used to group documents based on the value of the field specified and count the number of documents in each group In
MongoDB Aggregation: Select Count & Group By Read More »
A MongoDB cluster is used to denote a replica set of a collection of datasets distributed across multiple servers to speed up the overall processing during read and write operations. In this tutorial, we will learn about clusters in MongoDB, database clustering, the benefits of database clusters and the types of database clusters in detail.
Cluster In MongoDB And Different Types Of Clusters In MongoDB Read More »
In this tutorial, we will learn about sharding in MongoDB. It is time we learn an intermediate-level topic. Sharding in MongoDB is one such topic. Now, sharding in layman’s terms means that mechanism that stores data on multiple machines. This is done to feed the growing demand of the growth of data. Let us dive
Sharding in MongoDB: Explained in Detail Read More »
In this article, I will explain how to solve transaction errors in Solidity. This guide aims to provide examples of how to solve transaction errors in Solidity. So, let us get this guide started. The Transaction Error in Solidity A transaction error is usually a result when there is an error with a function marked
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In this tutorial, I will teach you how to perform error testing for your smart contract in Solidity. Error testing is a crucial aspect of development especially when it comes to blockchain development. Unlike development using other technologies, blockchain technology charges a fee to modify data on the smart contract. This is done to ensure
Error Testing Smart Contract in Solidity Ethereum Read More »
In this tutorial, I will cover the $and operator in MongoDB. So, the $and operator performs an AND operation on the given array of expressions. It eventually selects ALL the documents that matched the query. This guide aims to provide readers with a detailed walkthrough on different kinds of examples on how to use the
$and Operator in MongoDB – A Complete Guide Read More »