Category "types"

error TS2322: Type 'Event' is not assignable to type 'string'. [(ngModel)]="todoItem" (keyup) ="addTodo()"

I'm trying to bind my input to be able to display string. But I've this error: Error: list.component.html:3:15 - error TS2322: Type 'Event' is not assignable to

Defining new types in Haskell

I am pretty new to Haskell, and I was wondering if one can define new types that are defined by lists of other types. For example, I assume a string is defined

Append to existing tuple in c++

i am trying to make a thing to store types in list. The best thing is to use a tuple. then to get the type i use tuple_element_t. But the problem is when append

Python type hint for (any) class

I want to type hint the following function: def get_obj_class(self) -> CLASS_TYPE: return self.o.__class__ CLASS_TYPE should denote classes. self.o could

Typing variables in Common Lisp

I read that CL supports optional typing (as in the language has this feature) which I would assume allos for faster code in many cases, but I can't seem to find

Long return type hint and pep8

I have a function that raises an E501 line too long (86 > 79 characters) warning when running pycodestyle. def my_function(arg1: list = None) -> Tuple[pd.

make .d.ts for external library file available for project

I have a closed-source plain JS library that will be included via a <script> tag pointing to a CDN. I would like to author my own type definition file for

How to omit an union type depending on field value

I have this type (come from third party library): type StackActionType = { type: 'REPLACE'; payload: { name: string; key?: string | unde

How to include a global file type declaration in a TypeScript (Node.js) package

I'm working on a package that I am planning to publish publicly on npmjs. Let's call it the "text package". I would like that by default when installing that pa

Checking equality of interface{}

I am searching a []interface{} slice for a given interface{} value: var v interface{} for i := 0; i < len(A); i++ { if (A[i] == v) { fmt.Println("Gotc

Slick using mapped column type in update statement

I have a trouble in using slick MappedColumnType, the code snippet is as following: private trait UserTable { self: HasDatabaseConfigProvider[JdbcProfile] =&

React Three Fiber OBJLoader conflicts witth @types/three

I am following the official React Three Fiber Docs here. I am trying to load .obj files into my scene, using this article: react-three-fiber docs: loading obj m

How do I idiomatically convert a bool to an Option or Result in Rust?

It seems there is no way of such one-line conversion using std. I do not like this kind of verbosity: match my_bool { true => Ok(()), false => Err

How can I define a type for a css color in TypeScript?

I have the following example code snippet: type Color = string; interface Props { color: Color; text: string; } function Badge(props: Props) { re

Entity Framework : Value cannot be null. Parameter name: type

When I execute update-database command, it shows this error message System.ArgumentNullException: Value cannot be null. Parameter name: type at Sy

Typescript input onchange event.target.value

In my react and typescript app, I use: onChange={(e) => data.motto = (e.target as any).value} How do I correctly define the typings for the class, so I woul

How to use spark with large decimal numbers?

My database has numeric value, which is up to 256-bit unsigned integer. However, spark's decimalType has a limit of Decimal(38,18). When I try to do calculatio

In Python, how would you check if a number is one of the integer types?

In Python, how could you check if the type of a number is an integer without checking each integer type, i.e., 'int', 'numpy.int32', or 'numpy.int64'? I though

SQLAlchemy implicit type conversion and Date validation

Let's assume this model class: class Person(db.Model): __tablename__ = "person" date_of_birth = db.Column(db.Date) With person being an instance of Pe

Where is the NoneType located in Python 3.x?

In Python 3, I would like to check whether value is either string or None. One way to do this is assert type(value) in { str, NoneType } But where is NoneTy