Yes, you can use Object.fromEntries() along with substr(). Under substr(), mention the index from where to begin the substring and the length.
Example
const originalString = {
"John 21 2010" :1010,
"John 24 2012" :1011,
"John 22 2014" :1012,
"John 22 2016" :1013,
}
const result = Object.fromEntries(Object.entries(originalString).
map(([k, objectValue])=>
[k.substr(0, k.length-5), objectValue]));
console.log(result)To run the above program, you need to use the following command −
node fileName.js.
Here, my file name is demo41.js.
Output
This will produce the following output −
PS C:\Users\Amit\JavaScript-code> node demo41.js
{ 'John 21': 1010, 'John 24': 1011, 'John 22': 1013 }