Awesome
Recollect
Cached rendering and diff/patch library designed for Cumulo project.
API 
[cumulo/recollect "0.6.4"]
(recollect.twig/clear-twig-caches!)
(recollect.twig/new-twig-loop!)
(recollect.diff/diff-twig a b {:key :id})
(recollect.diff/patch-twig a changes)
Terms:
- Twig: data wrapped with a renderer to caching purpose
:key: to help diff maps
Purpose
Rendering data tree and doing diffing would be slow. It's a simlar to the problem of React DOM diffing.
This library is using the algorithm developed in Respo DOM diffing. It's like data rendering, with keeps reusing last result of data tree.
It's not tested yet, but is trying to trade memory and performance with caching.
Diff Operations
| number | name | meaning |
|---|---|---|
| 0 | tree-op-assoc | assoc-in |
| 1 | tree-op-dissoc | dissoc-in |
| 2 | tree-op-vec-append | append items to vector |
| 3 | tree-op-vec-drop | pop items from vector |
| 4 | tree-op-set-splice | remove and add to set |
| 5 | tree-op-seq-splice | remove and add to sequence |
For vectors, data is supposed to be manipulated from the tail. Items in the new vector are mapped to its old ones by index.
For sequences, unchanged values since the tail is kept. Changed elements in the front will be replaced directly.
For function arguments in deftwig, changes are ignored.
Related
For record parsing http://stackoverflow.com/a/29133350/883571
Develop
Workflow https://github.com/mvc-works/calcit-workflow
To run tests:
yarn test
License
MIT