Deep Immutable Mutation Using Spread Operator
| // Mutative | |
| company.users.push({ name: 'New User' }); | |
| return company; | |
| // Immutable | |
| return { ...company, users: [ ...company.users, { name: 'New User' } ] }; | |
| // Implicit identifier | |
| return { ...company, users: [ ... , { name: 'New User' } ] }; |
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