your coworkers to find and share information. Example: Promisify is a concept applied to callback functions. The passed in function will receive functions resolve and reject as its arguments which can be called to seal the fate of the created promise.. For getting the content of the first existent file from a list of file paths I use However, starting with an array of paths, the loop you seek can be expressed as a The .catch chain thus built, will progress to the next iteration on failure, or skip to the end of the chain on success. Bluebird Promise.any() early reject? Node.js is a cross-platform runtime library and environment for running...Testing is a key element to any application. GraphQL is an application layer server-side technology which is developed by...What is Node JS? If "then" connection is established, then it will get all of the records in the collection and display them in the console accordingly. @Bergi, that's as good as any, though not the one I remember.Ah, I see.
Featured on Meta Active 3 years, 9 months ago. Bluebird is a fully-featured Promise library for JavaScript. Promises in Node.js 10 are significantly faster than before. For Node.js, the framework available for Testing is...In this tutorial, we are going to learn about Generators and their differences with Callbacks What...What is Node.js? Promisify is a concept applied to callback functions.
Bluebird is a fully featured promise library with focus on innovative features and performance. Just an untested idea, but can you set a variable like var isErr, that you set to true if you reach that early break scenario. - but do you refer to my comment above or another answer of mine? Ask Question Asked 3 years, 9 months ago. Note. Create a new promise. Wouldn't be immediate but could be a pretty quick exit.Here's two more patterns that would do it. Node.js is a server-side platform built on Google Chrome's JavaScript Engine. Nice! Then in your other promises set a repeating timer up to check the status of that var and reject if true? What is GraphQL? Other Useful Features - Bluebird has Promise.map(), Promise.some(), Promise.any(), Promise.filter(), Promise.each() and Promise.props() all of which are occasionally handy. For people using babel in combination with webpack: you can use babel-polyfill.
By clicking “Post Your Answer”, you agree to our To subscribe to this RSS feed, copy and paste this URL into your RSS reader. While these operations can be performed with ES6 promises and additional code, Bluebird comes with these operations already pre-built and pre-tested so it's simpler and less code to use them. Further, files are read only if the previous read failed. I have to handle an actual error the same as a successful file content retrieval. The strongest feature of Bluebird is that it allows you to "promisify" other Node modules in order to use them asynchronously. It uses a...Download PDF 1) What is node.js? The Overflow Blog See the bluebird website for further documentation, references and instructions. After a successful file reading the remaining paths don't create a promise. I'm using promise library Bluebird in all my Node.js projects. See the API reference here. I'm using promise library Bluebird in all my Node.js projects. Stack Overflow works best with JavaScript enabled So if a Node JS module contains a callback function which does not return a value, and if we Promisify the node module, all the function's in that specific node module would automatically be modified to ensure that it returns a value.
Our example will first establish a connection to the "Employee collection" in the "EmployeeDB" database. Stack Overflow for Teams is a private, secure spot for you and The strongest feature of Bluebird is that it allows you to "promisify" other Node modules in order to use them asynchronously. You put me right on the simplicity of a catch chain in lieu of some convoluted promise inversion pattern I had devised.
Bluebird is a fully-featured Promise library for JavaScript. We will look at an example of how to use the bluebird module. module.exports = { entry: ['babel-polyfill', './app/js'] }; Or, instead of using the entire babel-polyfill you can install core-js and reference only the module you need. Bluebird Promises Tutorial . By using our site, you acknowledge that you have read and understand our Viewed 989 times 2. See Jake Archibald's comments: You credit me in your answer - thanks! https://github.com/petkaantonov/bluebird
I can't find it - possibly deleted? site design / logo © 2020 Stack Exchange Inc; user contributions licensed under This is very simply engineered into the catch chain by sending all errors except FILE_NOT_FOUND down the success path, thereby :Thanks for contributing an answer to Stack Overflow!