How create single object from Multiple number of objects using javascript or Lodash

Question

I have an object Like this

var Data= {
  "firstname": {
    "excelcolumnName": "firstName",
    "dbcolumn": "one",
    "testinfo": "basictest"
  },
  "labname": {
    "excelcolumnName": "LabName",
    "dbcolumn": "two",
    "testinfo": "basictest"
  },
  "percentCbd": {
    "excelcolumnName": "Percent CBD",
    "dbcolumn": "three",
    "testinfo": "Final Test"
  }

  "percentgeneral": {
    "excelcolumnName": "Percent General",
    "dbcolumn": "four",
    "testinfo": "Final Test"
  }
}

i want filter and create new object that contain testinfo:"basictest" the output of single object should be like this.

{
"one":"basictest",
"two":"basictest"
}

can any body help me on this.

user6387024 · Accepted Answer · 2016-06-20 09:38:45Z

1

From what I understand you want a single object containing dbcolumn:testinfo mappings

Check this JSBin

var Data2={};

_.map(Data,(obj)=>{
  if(obj.testinfo==='basictest'){
  var newObj={};
  newObj[obj.dbcolumn]=obj.testinfo;
  return _.assign(Data2,newObj);
  }
});
console.log(Data2);

The map function 'maps' each object into something else. The assign merges these key-value pairs. The newObj[obj.dbcolumn] line converts the value from 'dbcolumn:value' into a key for the new object.

edited Jun 20, 2016 at 9:38

answered Jun 20, 2016 at 9:22

user6387024

517 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

user6387024 Over a year ago

WIth lodash, you can use function chaining on arrays - not sure if it works on objects like your Data - Check this link blog.mariusschulz.com/2015/05/14/…

user6387024 Over a year ago

With chaining, you could have done _(Data).filter(function to filter out only basic tests).map(to get only dbcolumn:testinfo mappings)

Subburaj · Accepted Answer · 2016-06-20 09:05:25Z

0

Var array = [];

for(var i=0;i<Object.keys(Data).length;i++){
  if(data[i].testinfo === 'basictest'){ 
    array.push(data[i]);
  }
}

array will have all objects with testinfo = 'basictest'

answered Jun 20, 2016 at 9:05

Subburaj

5,21211 gold badges48 silver badges95 bronze badges

Comments

Alongkorn · Accepted Answer · 2016-06-20 10:23:38Z

Try this

const Data = {
  "firstname": {
    "excelcolumnName": "firstName",
    "dbcolumn": "one",
    "testinfo": "basictest"
  },
  "labname": {
    "excelcolumnName": "LabName",
    "dbcolumn": "two",
    "testinfo": "basictest"
  },
  "percentCbd": {
    "excelcolumnName": "Percent CBD",
    "dbcolumn": "three",
    "testinfo": "Final Test"
  },
  "percentgeneral": {
    "excelcolumnName": "Percent General",
    "dbcolumn": "four",
    "testinfo": "Final Test"
  }
}

const result = {} // contain result

for (var i in Data) {
 const item = Data[i]
 result[item.dbcolumn] = item.testinfo // add a new object item
}

console.log(result) // print {one: "basictest", two: "basictest", three: "Final Test", four: "Final Test"}

Collectives™ on Stack Overflow

How create single object from Multiple number of objects using javascript or Lodash

3 Answers 3

2 Comments

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

2 Comments

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related