Closed. This question is opinion-based. It is not currently accepting answers. Want to improve this question? Update the question so it can be answered with facts and citations by editing this post. Closed 1 year ago. Improve this question I was wondering what was the most clean and understandable syntax for doing condition checks on … Read more
I created a migration with unsigned user_id. How can I edit user_id in a new migration to also make it nullable()? Schema::create(‘throttle’, function(Blueprint $table) { $table->increments(‘id’); // this needs to also be nullable, how should the next migration be? $table->integer(‘user_id’)->unsigned(); } 11 Answers 11
I’m wanting to parse a string into a nullable int in C#. ie. I want to get back either the int value of the string or null if it can’t be parsed. I was kind of hoping that this would work int? val = stringVal as int?; But that won’t work, so the way I’m … Read more
How can I accomplish this using Postgres? I’ve tried the code below but it doesn’t work: ALTER TABLE mytable ALTER COLUMN mycolumn BIGINT NULL; 1 Answer 1
Optional type introduced in Java 8 is a new thing for many developers. Is a getter method returning Optional<Foo> type in place of the classic Foo a good practice? Assume that the value can be null. 6 Answers 6
I’m just revising chapter 4 of C# in Depth which deals with nullable types, and I’m adding a section about using the “as” operator, which allows you to write: object o = …; int? x = o as int?; if (x.HasValue) { … // Use x.Value in here } I thought this was really neat, … Read more
I have an interface in TypeScript. interface Employee{ id: number; name: string; salary: number; } I would like to make salary as a nullable field (Like we can do in C#). Is this possible to do in TypeScript? 10 Answers 10
I always used Nullable<>.HasValue because I liked the semantics. However, recently I was working on someone else’s existing codebase where they used Nullable<> != null exclusively instead. Is there a reason to use one over the other, or is it purely preference? int? a; if (a.HasValue) // … vs. int? b; if (b != null) … Read more
How do I convert a nullable int to an int? Suppose I have 2 type of int as below: int? v1; int v2; I want to assign v1‘s value to v2. v2 = v1; will cause an error. How do I convert v1 to v2? 20 s 20 The other answers so far are all … Read more
