https://github.com/jaw977/callbag-map-delve

Callbag operator that applies a transformation, which may be dot-notated path, on data passing through it
https://github.com/jaw977/callbag-map-delve

callbag

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Callbag operator that applies a transformation, which may be dot-notated path, on data passing through it

• Host: GitHub
• URL: https://github.com/jaw977/callbag-map-delve
• Owner: jaw977
• License: mit
• Created: 2018-02-26T13:50:02.000Z (almost 7 years ago)
• Default Branch: master
• Last Pushed: 2018-03-22T14:44:15.000Z (almost 7 years ago)
• Last Synced: 2024-10-12T23:26:36.071Z (3 months ago)
• Topics: callbag
• Language: JavaScript
• Size: 5.86 KB
• Stars: 4
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: readme.md
  • License: LICENSE.txt

Awesome Lists containing this project

• awesome-callbags - map-delve

README

        
# callbag-map-delve

Callbag operator that applies a transformation on data passing through it.

Works on either pullable or listenable sources.

The transformation may be a string containing a dot-notated path to get

in a (nested) object.  A default value may be passed to use if the full 

path does not exist or the value is undefined. (see the `dlv` module).

Otherwise, the transformation is assumed to be a function.

In this case it works exactly like callbag-map.

`npm install callbag-map-delve`

## Example:

```js

const { pipe, fromIter, forEach } = require('callbag-basics');

const map = require('callbag-map-delve');

pipe(

  fromIter([ {person:{name:"Jason"}}, 

             {person:{name:"Monica"}}, 

             {} ]),

  map("person.name", "Unknown"),

  map(name => "Name: " + name),

  forEach(x => console.log(x))  // Name: Jason

                                // Name: Monica

                                // Name: Unknown

);

```