## Async
### Description
Async is a utility module for handling asynchronous JavaScript operations. It provides a simple and intuitive API for managing callbacks, promises, timers, and more.
### Installation
To install Async, you can use npm, the package manager for JavaScript.
“`bash
npm install async
“`
### Features
#### Collections
The Collections module in Async provides a set of functions for working with arrays, objects, and other collections in an asynchronous manner.
##### `each`
The `each` function applies an asynchronous function to each item in a collection and executes a callback once all iterations are complete.
“`javascript
async.each(collection, iteratee, callback);
“`
##### `map`
The `map` function applies an asynchronous function to each item in a collection and returns an array of result values once all iterations are complete.
“`javascript
async.map(collection, iteratee, callback);
“`
#### Control Flow
The Control Flow module in Async allows you to manage the flow of asynchronous operations through a variety of control flow mechanisms.
##### `series`
The `series` function executes a set of asynchronous functions in series, ensuring that each function is completed before the next one is called.
“`javascript
async.series(tasks, callback);
“`
##### `parallel`
The `parallel` function executes a set of asynchronous functions in parallel, calling the callback once all functions have completed.
“`javascript
async.parallel(tasks, callback);
“`
#### Control Flow Composition
The Control Flow Composition module in Async provides a way to combine multiple control flow functions into more complex control flow patterns.
##### `waterfall`
The `waterfall` function applies a series of asynchronous functions, where each function passes its result to the next function in the series.
“`javascript
async.waterfall(tasks, callback);
“`
#### Utilities
The Utilities module in Async includes various utility functions that are useful for working with asynchronous operations.
##### `parallelLimit`
The `parallelLimit` function is similar to `parallel`, but it allows you to control the maximum number of parallel asynchronous functions that are executed at a time.
“`javascript
async.parallelLimit(tasks, limit, callback);
“`
##### `retry`
The `retry` function attempts to execute an asynchronous function multiple times until it succeeds or the maximum number of retries is reached.
“`javascript
async.retry(options, task, callback);
“`
### Documentation and Examples
#### Official Documentation
For official documentation, please refer to the official Async GitHub repository by clicking [here](https://github.com/caolan/async).
#### Examples and Tutorials
For examples and tutorials, check out the Async website’s documentation section by visiting their [website](https://caolan.github.io/async/).
### Support and Community
#### Stack Overflow
For questions and discussions about Async, you can visit [Stack Overflow](https://stackoverflow.com/questions/tagged/async).
#### GitHub Issues
If you encounter any issues or bugs with Async, please report them on the official GitHub repository’s [issue tracker](https://github.com/caolan/async/issues).
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