Question

111

delete unwanted properties from the javascript object

rated 0 times [ 115] [ 4] / answers: 1 / hits: 31736 / 7 Years ago, mon, march 27, 2017, 12:00:00

I have a javascript object like the one below with several fields and arrays and arrays within arrays. I'm only interested only in non-junk fields and wanted to remove all the junk properties from the objects. How can I do that using lodash?

I can do that by using delete, but I don't want to do that because that list is huge and I don't want to keep changing my code to write a delete every time a new junk property is added to my object.

{

 state: 'New York',

 country: 'usa',

 counties : [['washington','DC'],'Long Island',['New','Jersey']], 

 city : 'Manhattan',

 zip: '43543545',

 JunkOne : ['3453454','45345','45345'],

 JunkTwo: '5454545',

 JunkThree: {adc:'4545',vdfd:'45345'} 

}

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answered 7 Years ago ervindouglasm · Accepted Answer

You can use lodash.pick() to create an object with only the requested keys. For example:

var city = {

  state: 'New York',

  country: 'usa',

  counties : [['washington','DC'],'Long Island',['New','Jersey']], 

  city : 'Manhattan',

  zip: '43543545',

  JunkOne : ['3453454','45345','45345'],

  JunkTwo: '5454545',

  JunkThree: {adc:'4545',vdfd:'45345'}

}

var lodash = require('lodash');

city = lodash.pick(city, ['state', 'country', 'counties','city','zip']);

City now should have all the useful data, and none of the junk.