node js: access json if variable name in string?

Question

I have json object as following

var data = { 
   datetime:{
     time:"9:30 AM",
     date:"24-09-2017"
   }
}

and i have string var element = "data.datetime.time"how to access the time using element .

Ori Drori · Accepted Answer · 2017-09-24 07:09:34Z

2

Split the string (dot as separator), and use Array#reduce to extract the data from the object:

var data = { 
   datetime:{
     time:"9:30 AM",
     date:"24-09-2017"
   }
}

var element = "data.datetime.time";

var result = element.split('.').reduce(function(r, p) {
  return typeof r === 'object' ? r[p] : null; // if r is an object, return the prop value, if not return null
}, { data: data });

console.log(result);

edited Sep 24, 2017 at 7:09

answered Sep 24, 2017 at 7:02

Ori Drori

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Comments

guest271314 · Accepted Answer · 2017-09-24 07:09:31Z

0

new Function(`return ${element}`)()

answered Sep 24, 2017 at 7:09

guest271314

1

1 Comment

MaheshPVM Over a year ago

sorry I have done typo...its really working..thank you @guest271314

MaheshPVM · Accepted Answer · 2017-09-24 07:13:07Z

0

I have just found the answer for this..

simply we can use eval()

var data = {    
      datetime:{
        time:"9:30 AM",
         date:"24-09-2017"    
      } 
   }

var element = "data.datetime.time";

console.log(eval(element));

answered Sep 24, 2017 at 7:13

MaheshPVM

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