https://github.com/psmb/psmb.mapreduce
This package provides `.map()` and `.reduce()` FlowQuery operations.
https://github.com/psmb/psmb.mapreduce
neoscms
Last synced: 4 months ago
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This package provides `.map()` and `.reduce()` FlowQuery operations.
- Host: GitHub
- URL: https://github.com/psmb/psmb.mapreduce
- Owner: psmb
- License: gpl-3.0
- Created: 2016-10-26T12:02:06.000Z (over 8 years ago)
- Default Branch: master
- Last Pushed: 2017-02-01T12:55:31.000Z (over 8 years ago)
- Last Synced: 2025-01-03T22:48:16.625Z (5 months ago)
- Topics: neoscms
- Language: PHP
- Size: 35.2 KB
- Stars: 2
- Watchers: 2
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
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README
# Psmb.MapReduce
This package provides `.map()` and `.reduce()` FlowQuery operations.
Could be useful, huh?
## Installation
`composer require 'psmb/mapreduce:@dev'`
## Usage
### Map
Takes all items in current FlowQuery context, and transforms each value with given Eel operation.
There is a context variable `value` available, with a value of a current node.
E.g. this would give you an array of identifiers of all child nodes of a given node:
```
${q(node).children().map('value.identifier')}
```
See: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/map
### Reduce
Takes an Eel Expression as a first argument and initial values as the second. Injects `previousValue`,
`currentValue`, `index` and `array` context variables.
E.g. imagine you have a collection of Order nodes, where each node has a price property.
Now let's try to get a total price for all of the give nodes:
```
${q(node).children('orders').reduce('previousValue + currentValue.properties.price', 0)
```
See: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/Reduce