Dot-Object

Dot-Object makes it possible to transform javascript objects using dot notation.

Installation

Install from npm:

  npm install dot-object --save

Install from bower:

  bower install dot-object --save

Download

• Development version: https://unpkg.com/dot-object/dist/dot-object.js Uncompressed with Comments
• Production version: https://unpkg.com/dot-object/dist/dot-object.min.js Minified

Usage

Move a property within one object to another location

var dot = require('dot-object');

var obj = {
  'first_name': 'John',
  'last_name': 'Doe'
};

dot.move('first_name', 'contact.firstname', obj);
dot.move('last_name', 'contact.lastname', obj);

console.log(obj);

{
  contact: {
    firstname: 'John',
    lastname: 'Doe'
  }
}

Copy property from one object to another

var dot = require('dot-object');

var src = {
  name: 'John',
  stuff: {
    phone: {
      brand: 'iphone',
      version: 6
    }
  }
};

var tgt = {name: 'Brandon'};

dot.copy('stuff.phone', 'wanna.haves.phone', src, tgt);

console.log(tgt);

{
  name: 'Brandon',
  wanna: {
    haves: {
      phone: {
        brand: 'iphone',
        version: 6
      }
    }
  }
}

Transfer property from one object to another

Does the same as copy but removes the value from the source object:

dot.transfer('stuff.phone', 'wanna.haves.phone', src, tgt);

// src: {"name":"John","stuff":{}}
// tgt: {"name":"Brandon","wanna":{"haves":{"phone":{"brand":"iphone","version":6}}}

Expand to an object

var dot = require('dot-object');

var row = {
  'id': 2,
  'contact.name.first': 'John',
  'contact.name.last': 'Doe',
  'contact.email': '[email protected]',
  'contact.info.about.me': 'classified',
  'devices[0]': 'mobile',
  'devices[1]': 'laptop',
  'some.other.things.0': 'this',
  'some.other.things.1': 'that'
};

dot.object(row);

console.log(row);

{
  "id": 2,
  "contact": {
    "name": {
      "first": "John",
      "last": "Doe"
    },
    "email": "[email protected]",
    "info": {
      "about": {
        "me": "classified"
      }
    }
  },
  "devices": [
    "mobile",
    "laptop"
  ],
  "some": {
    "other": {
      "things": [
        "this",
        "that"
      ]
    }
  }
}

To convert manually per string use:

var dot = require('dot-object');

var tgt = { val: 'test' };
dot.str('this.is.my.string', 'value', tgt);

console.log(tgt);

{
  "val": "test",
  "this": {
    "is": {
      "my": {
        "string": "value"
      }
    }
  }
}

Pick a value using dot notation:

Picks a value from the object without removing it.

var dot = require('dot-object');

var obj = {
 some: {
   nested: {
     value: 'Hi there!'
   }
 }
};

var val = dot.pick('some.nested.value', obj);
console.log(val);

Hi there!

Delete/Remove a value using dot notation:

Remove and delete mostly behave the same, but in case of a path addressing array items:

• delete will re-index the array.
• remove will retain array indexes

var dot = require('dot-object');

var obj = {
 a: 'Hi There!',
 nested: {
   array: [ 
     'Veni',
     'Vidi',
     'Vici',
   ]
 }
};

var val = dot.delete('a', obj);
console.log(val);

Hi There!

// To remove an item and directly update any array indexes use:
var val = dot.delete('nested.array[1]', obj);
console.log(val);

Vidi

// Remove a value but retain array indexes. 
var val = dot.remove('nested.array[1]', obj);

// To remove multiple paths at once:
var val = dot.remove(['nested.array[0]', 'nested.array[2]'], obj);

Using modifiers

You can use modifiers to translate values on the fly.

This example uses the underscore.string library.

var dot = require('dot-object');

var _s = require('underscore.string');

var row = {
  'nr': 200,
  'doc.name': '    My Document   '
};

var mods = {
  "doc.name": [_s.trim, _s.underscored],
};

dot.object(row, mods);

console.log(row);

{
  "nr": 200,
  "doc": {
    "name": "my_document"
  }
}

Or using .str() directy:

var dot = require('dot-object');
var _s = require('underscore.string');
var obj = { id: 100 };

// use one modifier
dot.str('my.title', 'this is my title', obj, _s.slugify);

// multiple modifiers
dot.str('my.title', '   this is my title  ', obj, [_s.trim, _s.slugify]);

console.log(obj);

Result:

{
  "id": 100,
  "my": {
    "title": "this-is-my-title"
  }
}

Transform object

var dot = require('dot-object');

var source = {
  "id": 1,
  "contact": {
    "firstName": "John",
    "lastName": "Doe",
    "email": "[email protected]",
  }
}

var recipe = {
  'id': 'nr',
  'contact.firstName': 'name.first',
  'contact.lastName': 'name.last',
  'contact.email': 'email'
};

var tgt = {}
dot.transform(recipe, source, tgt);

// OR

var tgt = dot.transform(recipe, source);

console.log(tgt);
{
  "nr": 1,
  "name": {
    "first": "John",
    "last": "Doe"
  },
  "email": "[email protected]"
}

Convert object to dotted-key/value pair

var dot = require('dot-object');

var obj = {
  id: 'my-id',
  nes: { ted: { value: true } },
  other: { nested: { stuff: 5 } },
  some: { array: ['A', 'B'] }
};

var tgt = dot.dot(obj);

// or

var tgt = {};
dot.dot(obj, tgt);

console.log(tgt);

Result:

{
  "id": "my-id",
  "nes.ted.value": true,
  "other.nested.stuff": 5,
  "some.array[0]": "A",
  "some.array[1]": "B"
}

Keep array

Set keepArray to true.

var dot = require('dot-object');

var obj = {
  id: 'my-id',
  other: [1, 2, 3],
  some: { array: ['A', 'B'] }
};

dot.keepArray = true;
var tgt = dot.dot(obj);

console.log(tgt);

Result:

{
  "id": "my-id",
  "other": [1, 2, 3],
  "some.array": ["A", "B"]
}

Using a different separator

If you do not like dot notation, you are free to specify a different separator.

var Dot = require('dot-object');

var dot = new Dot('->');

var _s = require('underscore.string');

var row = {
  'nr': 200,
  'doc->name': '    My Document   '
};

var mods = {
  "doc->name": [_s.trim, _s.underscored],
};

dot.object(row, mods);

console.log(row);

{
  "nr": 200,
  "doc": {
    "name": "my_document"
  }
}

Transforming SQL results to JSON

SQL translation on the fly:

 // TODO

Copyright © 2013 Rob Halff, released under the MIT license