This article shows how you can use Promise instead of Callback functions while writing the synchronous programming code in Node.js. Node.js is asynchronous/non-blocking in nature. If we want to execute certain code only after the execution of another code then we can use Callback functions. However, there can be a need of using nested callback … Read more
Node.js code is asynchronous in nature. This article shows how you can use callback function in Node.js for synchronous programming. I have written an article with examples on synchronous and asynchronous programming in Node.js. Here’s the link: Node.js: Asynchronous & Synchronous Code Programming In the callback method, you simply pass a function as a parameter … Read more
This article shows how you can migrate data from Magento 1.x site to Magento 2.x site. We will use the Magento’s official Data Migration tool module. – The data migration can be done via the CLI commands. – The data like categories, products, orders, configuration settings, etc. can be migrated. -The data migration depends upon … Read more
Node.js is asynchronous in nature. The Node.js APIs are asynchronous or non-blocking. The long-running operations/APIs in Node.js are non-blocking. In Node.js: – The server never waits for any operation to complete and return the data. – The server moves to the next API/operation after calling it. – The response of the previous API call is … Read more
This article shows how you can create customers programmatically (through code) in Magento 2.x. I have also written a similar article on Creating Customer Programmatically in Magento 1.x. In this example code, I will show how you can save a customer with general information like firstname, lastname, and email. I will also show how you … Read more
This article shows how you can create a Simple Blockchain Application with Hyperledger Composer. Install pre-requisites First of all, you have to install the pre-requisites required for Hyperledger Composer. You need to install the following: – Docker Engine – Docker Compose – Node – Npm – Git – Python – Code Editor Details on pre-requisites … Read more
I downloaded the latest Magento 2 version from the Magento download site. Then, extracted it on my Apache Webserver root directory. I renamed the extracted Magento directory as magento2. I installed Magento2 via command line. Now, when I browse http://127.0.0.1/magento2, I get the following error: Forbidden You don’t have permission to access /magento2/ on this … Read more
Problem: – I did a new installation of Magento 2.2.5. – While installing it, I had disabled the third party modules installation. – The installation was successful. – Frontend opens fine. – Backend opens fine. – However, when I try to login to backend admin with the correct username and password, I get the following … Read more
Problem: While trying to start the Hyperledger Fabric or Hyperledger Composer network, you might get the following error: Generating orderer genesis block and channel config transaction with configtxgen 2018-08-22 11:28:37.034 UTC [common/tools/configtxgen] main -> WARN 001 Omitting the channel ID for configtxgen is deprecated. Explicitly passing the channel ID will be required in the future, … Read more