chainy-plugin-each v1.1.0

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()
	})

NPM

Browserify

Ender

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