1

I am working on javascript object. And I want to pass data to next array in a specific sequence. like I get data like this

var obj = [{
  0: "Owner Name"
  1: "Mailing Address"
  2: "Situs Address"
  3: "APN"  
}]

And want this sequence to be like this 

var obj = [{
  3: "APN"  
  0: "Owner Name"
  2: "Situs Address"  
  1: "Mailing Address" 
}];

Is it possible to do that, on bases of data? As I don't know from database sequence maybe change. edit: For those who are saying I should use array. I am getting data on basis of this object like,

 var data[{
  0:"CHANCE WILLIAM C & KATHRYN L"
  1:"P O BOX 7642 CHICO CA 95927"
  2:"LOT 4 PM 150-99/100"
  3:"040-310-086-000" }]
ephemeral
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    The properties in an object are not, and can not be, ordered in any way, so what you're trying to do is not possible. If you want to have a guaranteed order to the values put them in an array instead – Rory McCrossan Jul 07 '17 at 07:38
  • The only way is to build another Map object by specifying keys & values in your desired order. But, why do you want to do this? Ordering of keys doesn't affect how you access the values.. – Chris Lam Jul 07 '17 at 07:39
  • @ChrisLam Actually I have to pass a specific sequence to JSPDF to generate a pdf in a specific standard format. So I have to make a specif sequence – ephemeral Jul 07 '17 at 07:41
  • Possible duplicate of [Does JavaScript Guarantee Object Property Order?](https://stackoverflow.com/questions/5525795/does-javascript-guarantee-object-property-order) – str Jul 07 '17 at 07:43
  • You could retrieve them in order, using an array for the keys – dev8080 Jul 07 '17 at 07:43
  • @dev8080 that's still not guaranteed, as the 'array for the keys' will have the same issue – Rory McCrossan Jul 07 '17 at 10:42

3 Answers3

2

The properties in an object are not, and can not be, ordered in any way, so what you're trying to do is not possible. If you want to have a guaranteed order to the values put them in an array instead.

For those who are saying I should use array. I am getting data on basis of this object

In this case you can use Object.keys() and map() to convert the object to an array:

var data = [{
  0: "CHANCE WILLIAM C & KATHRYN L",
  1: "P O BOX 7642 CHICO CA 95927",
  2: "LOT 4 PM 150-99/100",
  3: "040-310-086-000"
}];

var arr = Object.keys(data[0]).map(function(k) {
  return data[0][k];
});
console.log(arr);
Rory McCrossan
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2

Object not have sorting property

so you can do like this,

Covert the array object arguments into individual object.then sorting with dec order of the key

var obj = [{
  '0': "Owner Name",
  '1': "Mailing Address",
  '2': "Situs Address",
  '3': "APN" ,
}];

var array = Object.keys(obj[0]).map(function(a){
                  return ({[a]:obj[0][a]});
}) //recreate with individual object

var sorted= array.sort((a,b)=> Object.keys(b)-Object.keys(a))
 console.log(sorted) //sorted  object
 
var res = sorted.map(a=> Object.values(a)[0]) // for array

console.log(res)
prasanth
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0

The keys in a JavaScript object do not have any order. They will be displayed in any order and can change because order is not preserved.

If you need your data in a particular order, use an Array.

Example of an array of strings preserving order 

var orderedItems = [
  "3: APN",
  "0: Owner Name",
  "2: Situs Address",
  "1: Mailing Address"
];
theRemix
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