How to change a PG column to NULLABLE TRUE?
From the fine manual: ALTER TABLE mytable ALTER COLUMN mycolumn DROP NOT NULL; There’s no need to specify the type when you’re just changing the nullability.
nullable
How to declare a type as nullable in TypeScript?
All fields in JavaScript (and in TypeScript) can have the value null or undefined. You can make the field optional which is different from nullable. interface Employee1 { name: string; salary: number; } var a: Employee1 = { name: ‘Bob’, salary: 40000 }; // OK var b: Employee1 = { name: ‘Bob’ }; // Not … Read more
What is the difference between Nullable.HasValue or Nullable != null?
The compiler replaces null comparisons with a call to HasValue, so there is no real difference. Just do whichever is more readable/makes more sense to you and your colleagues.
How to convert C# nullable int to int
The other answers so far are all correct; I just wanted to add one more that’s slightly cleaner: v2 = v1 ?? default(int); Any Nullable<T> is implicitly convertible to its T, PROVIDED that the entire expression being evaluated can never result in a null assignment to a ValueType. So, the null-coalescing operator ?? is just … Read more