mapped-types | Configuration module for Nest framework (nodejs) 🐺 | Web Framework library

by nestjs TypeScript Version: 1.2.2 License: MIT

X-Ray Key Features Code Snippets Community Discussions(10)Vulnerabilities Install Support

kandi X-RAY | mapped-types Summary

mapped-types is a TypeScript library typically used in Server, Web Framework, Angular, Nodejs, Swagger applications. mapped-types has no bugs, it has no vulnerabilities, it has a Permissive License and it has low support. You can download it from GitHub.

Mapped Types module for Nest used by the @nestjs/graphql and @nestjs/swagger packages.

Support

Quality

Security

License

Reuse

Support

mapped-types has a low active ecosystem.

It has 288 star(s) with 45 fork(s). There are 6 watchers for this library.

It had no major release in the last 12 months.

There are 1 open issues and 28 have been closed. On average issues are closed in 3 days. There are 2 open pull requests and 0 closed requests.

It has a neutral sentiment in the developer community.

The latest version of mapped-types is 1.2.2

Quality

mapped-types has no bugs reported.

Security

mapped-types has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

License

mapped-types is licensed under the MIT License. This license is Permissive.

Permissive licenses have the least restrictions, and you can use them in most projects.

Reuse

mapped-types releases are available to install and integrate.

Installation instructions, examples and code snippets are available.

Top functions reviewed by kandi - BETA

kandi's functional review helps you automatically verify the functionalities of the libraries and avoid rework.
Currently covering the most popular Java, JavaScript and Python libraries. See a Sample of mapped-types

Get all kandi verified functions for this library.

mapped-types Key Features

No Key Features are available at this moment for mapped-types.

mapped-types Examples and Code Snippets

No Code Snippets are available at this moment for mapped-types.

Community Discussions

Trending Discussions on mapped-types

Mapped Type with Prefix for each Property

TypeScript: map object types containing string unions into return result

How to publish Nestjs api in Google App Engine?

Typescript React / NestJS app fails @Heroku build - "error TS2307: Cannot find module"

Combine interfaces to generate a new type with a conjunction of their attributes

How to use type-level functions to create static types, dynamically?

Mapping tuple types within tuple types

How to add a type constraint to a mapped type?

Typescript complex mapped types that extract generic

What does "homomorphic mapped type" mean?

QUESTION

Mapped Type with Prefix for each Property

Asked 2021-Jun-06 at 13:59

I would like to create a type that only allows properties that start with a given prefix like that:

...

ANSWER

Answered 2021-Jun-06 at 13:59

Like @Nadia Chibrikova said, there is no way to build WithD without knowing example value up front.

The only way to handle it - is to know (be able to infer) the type you want to validate.

Source https://stackoverflow.com/questions/67858518

QUESTION

TypeScript: map object types containing string unions into return result

Asked 2021-Apr-27 at 16:12

This is an extension of this question: TypeScript: return a union of the input string array's literal values?

This question extends that last question by embedding the literal-tuple into arbitrary keys on an object, and maps them on the output keys.

...

ANSWER

Answered 2021-Apr-27 at 14:32

Don't have a full answer right now, but this was the type you were looking for:

Source https://stackoverflow.com/questions/67283810

QUESTION

How to publish Nestjs api in Google App Engine?

Asked 2021-Apr-18 at 08:05

I'm trying to put my nestjs api into Google App Engine but I still have an error. I have created my google cloud project first with the google sdk, edited my code as follow:

main.ts:

...

ANSWER

Answered 2021-Apr-15 at 23:22

Take a look on this other post:

nest Command not found

It seems you need to install and use npm as:

@nestjs/cli instead of just nest

Source https://stackoverflow.com/questions/67111581

QUESTION

Typescript React / NestJS app fails @Heroku build - "error TS2307: Cannot find module"

Asked 2021-Jan-17 at 19:47

I had a Typescript React/Express app that was working great both local and @Heroku. This week I started learning Nest.JS, so I replaced the Express end with it. The app works just fine in local but the Heroku build fails. I went through a number of topics and guides but didn't managed to locate the issue and at this point I'm not even able to decide whether the problem is on the React or the Nest.JS side.

The Heroku build goes well and at some point it quits with the following:

...

ANSWER

Answered 2021-Jan-17 at 19:47

Okay, I found my mistake. I'll just leave the thread up in case someone will need in the future.

I used this script:

Source https://stackoverflow.com/questions/65761736

QUESTION

Combine interfaces to generate a new type with a conjunction of their attributes

Asked 2020-Nov-09 at 21:11

i have an object Locale that holds the localisations of my app.

...

ANSWER

Answered 2020-Nov-09 at 20:12

Not the most readable type, but this works. Requires TS4.1.

Playground Link

Usage:

Source https://stackoverflow.com/questions/64757839

QUESTION

How to use type-level functions to create static types, dynamically?

Asked 2020-Jun-10 at 21:20

In TypeScript, there are type-level functions that allow creating new types based on given literal types/specifications (see Mapped Types, Conditional Types, etc.).

For instance, here is such a function, let say provided by a lib author:

...

ANSWER

Answered 2020-Jun-08 at 14:50

Given Scala is one of the tagged languages, here is a solution in Dotty (aka. Scala 3). Take this with a grain of salt, since Dotty is still under development. Tested with Dotty version 0.24.0-RC1, here is a Scastie that proves this actually compiles.

Scala doesn't have the same sort of built-in type machinery as TypeScript for manipulating records. Not to fear, we can roll our own!

Source https://stackoverflow.com/questions/62248481

QUESTION

Mapping tuple types within tuple types

Asked 2020-Jun-06 at 02:05

The docs for mapped tuple types offer this example:

...

ANSWER

Answered 2020-Jun-06 at 01:52

The obvious problem here is that the T in MapToClean is not constrained to a type whose properties are [string, number]. You could add an appropriate constraint and then it would work:

Source https://stackoverflow.com/questions/62225620

QUESTION

How to add a type constraint to a mapped type?

Asked 2020-Feb-27 at 09:03

I am trying to add more typings to MongoDB query system.

I have an object

...

ANSWER

Answered 2020-Feb-27 at 09:03

You can use conditional type to allow query operator only on "number" field:

Source https://stackoverflow.com/questions/60429401

QUESTION

Typescript complex mapped types that extract generic

Asked 2020-Jan-28 at 14:11

Similar to TypeScript Mapped Types: Get element type of array, I have a type, say:

...

ANSWER

Answered 2020-Jan-28 at 14:11

UPDATE 2020-01-28

Since TypeScript 2.8 introduced conditional types you can now do this mapping with relative ease:

Source https://stackoverflow.com/questions/46333496

QUESTION

What does "homomorphic mapped type" mean?

Asked 2020-Jan-18 at 16:13

I've seen the term "homomorphic mapped type" in a few TypeScript PRs. Here's an example: https://github.com/microsoft/TypeScript/pull/21919

In --strictNullChecks mode, when a homomorphic mapped type removes a ? modifier from a property in the underlying type it also removes undefined from the type of that property

What is a homomorphic mapped type? What exactly is the homomorphism? Is there a good example of a non-homomorphic mapped type

The reason for my confusion is that a homomorphism is map between two structures that preserves a particular operation. What is the operation in question here? That is, where f is the mapping, what is op in the following equation:

f(x op y) = f(x) op f(y)

What I tried

I tried going on the assumption that op is &, the operation that intersects two types.

A homomorphic mapping would then be one such that:

F = F & F

An example of a homomorphic mapping (from the TS handbook) is:

...

ANSWER

Answered 2020-Jan-17 at 17:07

In TypeScript, a homomorphic mapped type is specifically a type in which the compiler recognizes that you are mapping the properties of an existing object type. In such cases, the output object type will have the same readonly and/or optional (?) property modifiers on its properties as the ones on the input type do. There are a few ways I know of to make a mapped type homomorphic, and some other ways to make it... not.

In what follows, let's use this type as something to map over:

Source https://stackoverflow.com/questions/59790508

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install mapped-types

As you build out features, it's often useful to construct variants on a base entity type. A good example of such a variant is a Data Transfer Object (DTO). A Data Transfer Object is an object that is used to encapsulate data, and send it from one part of your application to another. DTO’s help us define the input and output interfaces of our system. Let's imagine a real-world example, where we typically need to build both a create and update variations for the same entity type. The create variant may require all fields, while the update variant may make all fields optional. Not to mention, both these types can also be variants of an entity type (to some extent).
PartialType - returns a type (class) with all the properties of the input type set to optional (requirement: at least 1 validation decorator applied to each property)
PickType - constructs a new type (class) by picking a set of properties from an input type
OmitType - constructs a type by picking all properties from an input type and then removing a particular set of keys
IntersectionType - combines two types into one new type (class)

Support

Nest is an MIT-licensed open source project. It can grow thanks to the sponsors and support by the amazing backers. If you'd like to join them, please read more here.

Find more information at: