json-paths

Collect different paths of JSON data. Allows to compare complex JSON structures by it's shape.

Installation

Install from npm:

npm install json-paths

Usage

Import jsonPaths and call it on some JSON data:

import { jsonPaths } from 'json-paths';

// given some data
const data = {
  foo: {
    bar: 'aaa',
    baz: 'bbb',
  }
};

// calculate json paths
const shape = jsonPaths(data);
/*
  { 
   'foo.bar': 1, 
   'foo.baz': 1 
  }
*/

For arrays, all elements are counted with the same path and # as an index:

const data = {
  foo: {
    bar: ['a', 'b', 'c']
  }
};

const shape = jsonPaths(data);
/*
  { 
    'foo.bar.#': 3
  }
*/

You can count each value inside a path:

const data = {
  foo: {
    bar: ['a', 'a', 'a', 'b', 'c']
  }
};

const shape = jsonPaths(data, { '*': 'value' });
/*
  { 
    'foo.bar.#': { 
      a: 3,
      b: 1,
      c: 1,
    }
  }
*/

Ignoring path:

const data = {
  foo: {
    bar: 'aaa',
    baz: 'bbb',
  }
};

const shape = jsonPaths(data, { 'foo.bar': false });
/*
  { 
   'foo.baz': 1, 
  }
*/

API

jsonPaths(obj, rules?, options?)

Params

• obj object | array - JSON data to calculate paths

• rules object - rules for calculating different paths. Each key in that object serves as a path prefix (* matches any path). Each value is one of the following:

  • any falsy value - path is ignored
  • "value" - calculates count for each value in that path
  • function - the same as "value", but value is transformed by the function
  • any other value - calculates count of that path (default)

• options object - additional options

  • sep string - path separator (default .)
  • sepReplacement string - replacement if sep is found in original object key (default ~)
  • indexReplacement string - replacement for array indexes (default #)

Returns: object - object with json paths

License

MIT