object-mask

Copy an object based on a mask of allowed or denied properties

npm install object-mask
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node-object-mask

The purpose of this module is to provide a way to specify which properties of an object should be copied to a new instance of the object. It can be done in either allow or deny modes.

In deny mode (the default), any property which exists on both the source object and the mask object will NOT be copied; copying only properties which are NOT defined on the mask object.

In allow mode, any property which exists on both the source object and the mask object WILL be copied; copying only properties which ARE defined on the mask object.

install

npm

npm install object-mask

git

git clone git://github.com/wankdanker/node-object-mask.git

the function

mask(sourceObject, maskObject, allow);

  • sourceObject - the object to copy
  • maskObject - the object or array which defines properties to copy
    • if the maskObject is an array then it is assumed that the sourceObject will be a flat object and the values of the array will be used as the propery names to mask
  • allow - optional - true/false use allow mode (default is deny)

example

mask = require('mask');

var obj = {
  "sku" : "12345"
  , "upc" : "99999912345X"
  , "title" : "Test Item"
  , "description" : "Description of test item"
  , "length" : 5
  , "width" : 2
  , "height" : 8
  , "inventory" : {
    "onHandQty" : 12
  }
};

var objMask = {
  sku : true
  , upc : true
  , description : true
}


var result = mask(obj, objMask, true);

/*
{ 
  sku : "12345"
  , upc : "99999912345X"
  , description : "Description of test item"
};
*/

//or in the default deny mode

var result = mask(obj, objMask);

/*
{
  "title" : "Test Item"
  , "length" : 5
  , "width" : 2
  , "height" : 8
  , "inventory" : {
    "onHandQty" : 12
  }
};
*/

//using an array mask

var arrayMask = ["title", "length"];

var result = mask(obj, arrayMask, true);

/*
{
  "title" : "Test Item"
  , "length" : 5
};
*/

license

The MIT License (MIT)

Copyright (c) 2012 Daniel L. VerWeire

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.

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