Partjson

Reshape data rows into partitioned summary values and collections, using a JSON-based template.

Documentation

Syntax and Demonstration

https://siosonel.github.io/partjson/

CLI examples

$ npm install -g partjson

$ printf "key,val,type\nA,2,cat\nB,3,cat\nA,5,dog" | partjson '{"$key":{"total":"+$val","$type":"+$val"}}'
{
    "A": {
        "total": 7,
        "cat": 2,
        "dog": 5
    },
    "B": {
        "total": 3,
        "cat": 3
    }
} 

JS example

import Partjson from 'partjson'

const pj = new Partjson({
	template: {
		"$key":{
			total: "+$val",
			byType: {
				"$type": "+$val"
			}
		}
	}
})

pj.add([
	{key: "A", val: 2, type: "cat"},
	{key: "B", val: 3, type: "cat"},
	{key: "A", val: 5, type: "dog"}
])

console.log(pj.tree)
/*
{
  "A": {
    "total": 7,
    "byType": {
    	"cat": 2,
    	"dog": 5
    }
  },
  "B": {
    "total": 3,
    "byType": {
   	 	"cat": 3
   	}
  }
}
*/

Develop

Clone this repository and install its dependencies:

git clone [email protected]:siosonel/partjson.git
cd partjson
npm install 

npm run dev builds the library, then keeps rebuilding it whenever the source files change using rollup-watch.

npm test tests the umd build.

npm run prettify runs prettify and npm test.

npm run report runs creates a coverage report in ./coverage/index.html.

npm run build outputs the library to dist in cjs (for Node), esm (for import), and umd (for browser script).

License

MIT.