Deep extend with customizable behavior for Node.js.

"Extedify" is a lightweight wrapper over lodash's _.merge (like a deep _.extend) with customizable handling of arrays, booleans, numbers and strings.

(By default, extedify will behave exactly like lodash's _.merge.)

Installation

npm install extendify

Usage

var extendify = require('extendify');
myExtend = extendify({
    // options
});

Options

• inPlace – Override the 'source' with the result?
  • true (default)
  • false
• isDeep – Use deep extend?
  • true (default)
  • false
• arrays – How to handle arrays?
  • replace (recommended)
  • concat
  • merge (default)
  • or
  • and
• booleans – How to handle booleans?
  • replace (default)
  • concat
  • or
  • and
• numbers – How to handle numbers?
  • replace (default)
  • concat
  • or
  • and
• strings – How to handle strings?
  • replace (default)
  • concat
  • or
  • and

Example

Let's get an _.extend function that

• returns a copy/clone,
• replaces arrays,
• supports nested objects (also known as deep extends).

_.extend = extendify({
    inPlace: false,
    isDeep: true,
    arrays : 'replace'
});

object1 = {
    a:{
        list: [1, 2]
    },
    b: 4
};

object2 = {
    a:{
        list: [3]
    }
};

var result = myExtend(object1, object2);
/*
{
    a: {
        list: [3]
    },
    b: 4
}
*/

More examples are available in the 'examples.js' file.

Contributions

Your feedback is welcome, email me at [email protected].