One potential issue with the approved solution is when the masterdata objects contain nested objects like:
{
name: 'John',
age: 30,
address: {
street: 'ChurchStreet',
city: 'Bangalore',
state: 'KA'
}
}
var masterdata = [
{
name: 'John',
age: 30,
address: {
street: 'ChurchStreet',
city: 'Bangalore',
state: 'KA'
}
},
{
name: 'Jane',
age: 26,
address: {
street: 'West of Chord',
city: 'Mumbai',
state: 'MH'
}
}
];
// Using the spread operator
var datatoedit = {...masterdata[0]};
datatoedit.age = 32;
datatoedit.address.street = 'Infantry Road';
console.log('Using the spread operator');
console.log('masterdata[0]: ' + JSON.stringify(masterdata[0]));
console.log('datatoedit: ' + JSON.stringify(datatoedit));
// Using Object.assign()
datatoedit = Object.assign({}, masterdata[0]);
datatoedit.age = 35;
datatoedit.address.street = 'Brigade Road';
console.log('Using Object.assign()');
console.log('masterdata[0]: ' + JSON.stringify(masterdata[0]));
console.log('datatoedit: ' + JSON.stringify(datatoedit));
// Applying JSON.parse() and JSON.stringify()
datatoedit = JSON.parse(JSON.stringify(masterdata[0]));
datatoedit.age = 35;
datatoedit.address.street = 'West of Chord Road';
console.log('Using JSON.parse() and JSON.stringify()');
console.log('masterdata[0]: ' + JSON.stringify(masterdata[0]));
console.log('datatoedit: ' + JSON.stringify(datatoedit));
It's worth noting that when dealing with nested objects, both the spread operator and Object.assign() may not work as expected due to shallow copying.
By employing a combination of JSON.parse() and JSON stringify(), a proper deep copy can be achieved, ensuring correct behavior in all scenarios (even though these functions are not specifically designed for deep copying).