Changing var name from array of objects in Javascript

Question

I have been struggling with changing the column name from the array of objects. One of the column name contain spaces.

var array = [{"First Name":"John", "Last Name":"Doe", "age":46}, {"First Name":"Tim", "Last Name":"Jones", "age":26}, {"First Name":"Marcus", "Last Name":"Brown", "age":31}, {"First Name":"Paul", "Last Name":"Daniels", "age":28}];

I want to change the object column name to firstName or first_name so the array could be the following:

var array = [{"first_name":"John", "Last Name":"Doe", "age":46}, {"first_name":"Tim", "Last Name":"Jones", age:26}, {"first_name":"Marcus", "Last Name":"Brown", "age":31}, {"first_name":"Paul", "Last Name":"Daniels", "age":28}];

I tried mapping like this, but it didn't work since i can do that inside a map function:

...
 .map(({ [First Name], age}) => ({ [First Name], age}))
...

I want to change the column name before mapping it so I would do something like this:

...
 .map(({ first_name, age}) => ({ first_name, age}))
...

Well First Name:"John" is a syntax error so is it actually "First Name":"John" — epascarello
– epascarello, Commented Mar 10, 2020 at 16:35

Tamas Szoke · Accepted Answer · 2020-03-10 16:50:13Z

1

According to the comments, I modified your JSON to be valid, now you can loop over it and create a new object with the desired results:

let array = [{"First Name": "John", "Last Name":"Doe", age:46}, {"First Name":"Tim", "Last Name":"Jones", age:26}, {"First Name":"Marcus", "Last Name":"Brown", age:31}, {"First Name":"Paul", "Last Name":"Daniels", age:28}];

let modifiedArray = array.map(item => {
   return {
     first_name: item["First Name"],
     "Last Name": item["Last Name"],
     age: item.age
   }
 });

console.log(modifiedArray);

I hope it helps!

edited Mar 10, 2020 at 16:50

answered Mar 10, 2020 at 16:41

Tamas Szoke

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1 Comment

Mark A Avila Over a year ago

This definitely helped me. Thank You!

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