Each action for ChainyJS

Chainy action that iterates through each item in the array with an asynchronous or synchronous iterator

Use the each plugin like so:

require('chainy').create().require('set each')
    // Iterate over an array
    .set(['a', 'b', 'c'])
    .each(iterator)
 
    // Iterate over an object
    .set({a: 1, b: 2, c: 3})
    .each(iterator)
 
    // Iterate with some custom options to use for the internal taskgroup
    .each(iterator, taskgroupOptions)

The iterator can operate synchronously:

.each(function (itemValue) {
    // ..
})

Or asynchronously:

.each(function (itemValue, complete) {
    // ...
    complete()
})

Or asynchronously with the item's index/key as well:

.each(function (itemValue, itemIndex, complete) {
    // ...
    complete()
})

The taskgroupOptions is an optional configuration object that can be used to configure the internal taskgroup. A common use case for this is to instead of having our iterators operate serially (one after the other, a concurrency of 1), instead we could have them all operate at once (with a concurrency of 0) by specifying the following taskgroup configuration like so:

.each(iterator, {concurrency: 0})

Tying this all together, we can do things like:

require('chainy').create().require('set each')
 
    // --------------------------------
    // Array data
    .set(['a', 'b', 'c'])
 
    // Synchronous iterator
    .each(function (itemValue) {
        console.log(itemValue)  // 'a' then 'b' then 'c'
    })
 
    // Asynchronous iterator
    .each(function (itemValue, complete) {
        console.log(itemValue)  // 'a' then 'b' then 'c'
        complete()
    })
 
    // Asynchronous iterator with index
    .each(function (itemValue, itemIndex, complete) {
        console.log(itemValue)  // 'a' then 'b' then 'c'
        console.log(itemIndex)  // 0 then 1 then 2
        complete()
    })
 
 
    // --------------------------------
    // Object data
    .set({a:1, b:2, c:3})
 
    // Synchronous iterator
    .each(function (itemValue) {
        console.log(itemValue)  // 1 then 2 then 3
    })
 
    // Asynchronous iterator
    .each(function (itemValue, complete) {
        console.log(itemValue)  // 1 then 2 then 3
        complete()
    })
 
    // Asynchronous iterator with index
    .each(function (itemValue, itemIndex, complete) {
        console.log(itemValue)  // 1 then 2 then 3
        console.log(itemIndex)  // 'a' then 'b' then 'c'
        complete()
    })

Install

NPM

Install: npm install --save chainy-plugin-each

Module: require('chainy-plugin-each')

Browserify

Install: npm install --save chainy-plugin-each

Module: require('chainy-plugin-each')

CDN URL: //wzrd.in/bundle/chainy-plugin-each@1.1.0

Ender

Install: ender add chainy-plugin-each

Module: require('chainy-plugin-each')

Editions

This package is published with the following editions:

• chainy-plugin-each aliases chainy-plugin-each/source/index.js
• chainy-plugin-each/source/index.js is Source + ES5 + Require

History

Discover the release history by heading on over to the HISTORY.md file.

Contribute

Discover how you can contribute by heading on over to the CONTRIBUTING.md file.

Backers

Maintainers

These amazing people are maintaining this project:

• Benjamin Lupton

Sponsors

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Contributors

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Discover how you can contribute by heading on over to the CONTRIBUTING.md file.

License

Unless stated otherwise all works are:

• Copyright © 2014+ Bevry Pty Ltd

and licensed under:

• MIT License