Tag: Null Safety

Asp.Net Core

.NET Core: Use Required Modifier to Force Property Initialization

- - ErcanOPAK comment on .NET Core: Use Required Modifier to Force Property Initialization

Tired of null reference exceptions because someone forgot to set a property? Make it required. Old Problem: public class User { public string Name { get; set; } // Can be null! public string Email { get; set; } // Can be null! } var user = new User(); // Compiles fine Console.WriteLine(user.Name.Length); // NullReferenceException! […]

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JavaScript

JavaScript: Use Optional Chaining to Prevent ‘Cannot Read Property of Undefined’ Errors

- - ErcanOPAK comment on JavaScript: Use Optional Chaining to Prevent ‘Cannot Read Property of Undefined’ Errors

Your app crashes with “Cannot read property ‘name’ of undefined”? Optional chaining (?.) safely accesses nested properties without try-catch blocks. The Error-Prone Old Way: const user = getUserData(); // Might return null // ❌ This crashes if user is null/undefined const name = user.profile.name; // TypeError: Cannot read property ‘profile’ of undefined // ❌ Traditional […]

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