fill-keys 
 
 
Fill keys in a destination that are defined on the source. Copies descriptors so properties like
enumerablewill persist.
Install
$ npm install --save fill-keys
 
Usage
var fillKeys = require('fill-keys');
fillKeys(destination, source);
//=> missing destination keys in source are copied 
fill-keys will copy descriptors. It will also copy the source.prototype properties onto destination.prototype if both destination and source are functions.
API
fillKeys(destination, source) -> destination
 
destination
 
Required
 Type: any
The destination object where keys from source will be added.
source
Required
 Type: any
The source object from which to copy properties.
fillKeys.es3(destination, source) -> destination
 
An ES3-compatible version of fillKeys. Behavior is identical but simple assignment is used instead of Object.defineProperty.
License
MIT © Ben Drucker