https://github.com/haoliangyu/rx-to-json

RxJS 5 operator to create JSON file
https://github.com/haoliangyu/rx-to-json

json operator rxjs5 write

Last synced: about 1 month ago
JSON representation

RxJS 5 operator to create JSON file

• Host: GitHub
• URL: https://github.com/haoliangyu/rx-to-json
• Owner: haoliangyu
• License: mit
• Created: 2017-10-23T05:01:54.000Z (about 7 years ago)
• Default Branch: master
• Last Pushed: 2017-10-24T04:29:01.000Z (about 7 years ago)
• Last Synced: 2024-04-24T04:11:50.734Z (7 months ago)
• Topics: json, operator, rxjs5, write
• Language: JavaScript
• Size: 41 KB
• Stars: 1
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • Changelog: CHANGELOG.md
  • License: LICENSE

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README

        
# rx-to-json

![build status](https://travis-ci.org/haoliangyu/rx-to-json.svg?branch=master)

[![ReactiveX](http://reactivex.io/assets/Rx_Logo_S.png)](http://reactivex.io/)

[RxJS 5](http://reactivex.io/) operator to write data into a [JSON](https://en.wikipedia.org/wiki/JSON) file

Work in both JavaScript and TypeScript

## Installation

```

npm install rx-to-json

```

## Use

Import this library and it will add `toJSON` operator to the rxjs `Observable` class.

```

public toJSON(path: string, options?: any): Observable

```

Parameters:

  * **path**: JSON file path

  * **options**: optional configuration for the JSON creation

    * **header**: JSON header. Default: `[`

    * **footer**: JSON footer. Default: `]`

## Example

Generate a JSON file from data flow:

``` javascript

import { Observable } from 'rxjs';

import 'rx-to-json';

let data = [

  { id: 1, name: 'Mike' },

  { id: 2, name: 'Tommy' }

];

Observable.of(...data)

  .toJSON('data.json')

  .subscribe();

// output file:

// [{"id":1,"name":"Mike"},{"id":2,"name":"Tommy"}]

```

Download data from a PostgreSQL dadtabase and save it as a JSON file:

``` javascript

import pgrx from 'pg-reactive';

import 'rx-to-json';

let db = new pgrx('connection string');

db.query('SELECT id, display_name FROM users')

  .map((row) => {

    // convert the data to match column names

    return {

      id: row.id,

      name: row.display_name

    };

  })

  .toJSON('data.json')

  .subscribe();

```

## License

MIT