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Nodejs json compare code#

As a result, Node.js can easily manage more concurrent client requests. The Node JS Processing paradigm is heavily influenced by the JavaScript Event-based model and the JavaScript callback system. The Multi-Threaded Request/Response Stateless Model is not followed by the Node JS Platform, and it adheres to the Single-Threaded Event Loop Model. If Node.js is single-threaded, then how does it handle concurrency? By doing async processing on a single-thread under typical web loads, more performance and scalability can be achieved instead of the typical thread-based implementation. Node.js is single-threaded for async processing. Once the task is carried out completely, the response is sent to the Event Loop that sends that response back to the client. This thread is responsible for completing a particular blocking request by accessing external resources, such as computation, database, file system, etc.

The Event Loop processes simple requests (non-blocking operations), such as I/O Polling, and returns the responses to the corresponding clientsĪ single thread from the Thread Pool is assigned to a single complex request.

It checks if the requests are simple enough not to require any external resources

The requests are then passed one-by-one through the Event Loop.

Node.js retrieves the incoming requests and adds those to the Event Queue.

Requests can be non-blocking or blocking:

Clients send requests to the webserver to interact with the web application.

Let’s explore this flow of operations in detail.

It offers a unified programming language and data typeĪ web server using Node.js typically has a workflow that is quite similar to the diagram illustrated below.

Node.js makes building scalable network programs easy. You can also use it for developing: Real-time web applications, Network applications, General-purpose applications, and Distributed systems.

You can use I/O intensive web applications like video streaming sites. Node.js is perfect for data-intensive applications as it uses an asynchronous, event-driven model. It is used to create server-side web applications. Node.js is an open-source, cross-platform JavaScript runtime environment and library to run web applications outside the client’s browser. This section will provide you with the Basic Node.js interview questions which will primarily help freshers. Finally, parse string object to convert into of type Object using Interview Questions and Answers For Freshers.Callbacks contain two parameters, One is error and another is a string object, the error object contains an error if an error occurs, string objects read the JSON content into a string.

nodejs fs filesystem module has the readFile method which asynchronously read the path of the local JSON file and returns callbacks.

Nodejs json compare code#

Import the fs module into code using require function.This is an asynchronous way of reading JSON files from the file system. Asynchronous reading local json file using the nodejs fs module It is not suitable for reading the large file as file content is read into memory.

It is synchronous of reading the file, Performance is not good, the current thread waits for the reading to complete.It reads during code execution and changes to the JSON file are reloaded and read as expected.Ĭall the readFileSync method with the path of the file and encoding details.Here are the following steps to read the local JSON fileįirst, Import the fs module into your js file readjson.js