tea-merge

Deep object merge utility.

Installation

Node.js

tea-merge is available on npm.

$ npm install tea-merge

Component

tea-merge is available as a component.

$ component install qualiancy/tea-merge

Usage

merge (destination, source, ...)

• @param {Array|Object} destination
• @param {Array|Object} sources ...
• @return {Object} destination merge

For each source, shallow merge its key/values to the destination. Sources are read in order, meaning the same key in a later source will overwrite the key's value set earlier.

Also, this tool only supports objects and arrays. Furthermore, the destination and all sources must be of the same type.

var merge = require('tea-merge');

// sample objects
var a = { hello: 'universe', arr: [ { a: 'a' } ] }
  , b = { speak: 'loudly', arr: [ { b: 'b' }, { c: 'c' } };

merge(a, b);
a.should.deep.equal({
    hello: 'universe'
  , speak: 'loudly'
  , arr: [
        { a: 'a', b: 'b' }
      , { c: 'c' }
    ]
});

When merging objects, it is expected that if the key from the source already exists in the destination, the existing value in the source supports the same type of iteration as in the destination. If they cannot, a Incompatible merge scenario. error will be thrown.

Rules

• Non-iterable values can be replaced with other non-iterable values: strings, numbers, etc.
• Iterable values cannot replace non-iterable values; objects can't replace string, arrays, can't replace numbers, etc.
• Non-iterable values cannot replace iterable values; numbers can't replace objects, strings can't replace arrays, etc.

License

(The MIT License)

Copyright (c) 2012 Jake Luer [email protected] (http://qualiancy.com)

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.