Base type on object
First off – Sorry for the long explanation, but I am unsure how to make it clear enough what I want without it. But…I am making a Table component in React (with typescript). And I am thinking …
Tag: types
Why typescript recognizes imported variables as of type any?
I have the following 2 files: File src/helpers.ts: const someHelperArray = [‘value1’, ‘value2’] as const module.exports = { someHelperArray } File src/car.ts: const { someHelperArray } = require(…
If there a way to test a char to a class of user define character?
Is there any way to define a type and do the following? char c = ‘a’; if (c == BRASSECHARTYPE) { // do something if c is one of the following char [{()}] }
How to implement promisified setTimeout with clearTimeout functionality?
The following implementation throws an error (see comment below), how to resolve this? interface PromiseWithAbort extends Promise
How to convert value to user-inputted type?
Say I have a function where it converts 8 to a user-inputted type: def convert_8_to_type(to_type): What do I use to convert it to to_type? Something like this: to_type(8) except I would like it to …
Typescript: Adding additional overloads to an existing abstract class
I am working on developing a set of definitions for DefinitelyTyped, for the package Leaflet.Editable. Leaflet is notable in that it uses a partially custom class implementation to allow for extending …
Difficulty implementing a simplified borrow-checker in JavaScript
For all intents and purposes, I have a bunch of functions and function calls with this sort of AST structure. It’s an array of functions. const ast = [ { type: ‘function’, name: ‘doX’, …
Use argument’s property as type in typescript
I want to assign type to property of class that depends on passed property in argument. I wonder if it’s possible. Example: enum MyEnum { g, f, h, } interface MappedTypes { [MyEnum.f]:…
Python __class__()
In Python’s documentation __class__ is described as an attribute. In the object type (the metaclass), __class__ appears to be a method. If we do: >>> class Foo: pass >>> a …
Confusing behaviour of overloading
I am experiencing a behaviour that I do not understand related to this code snippet. More precisely, I was expecting the call of getUniqueCost method for the case in which the operator is of type …