Combine enum values to retrieve corresponding enum strings.
Consider the following scenario:
enum EnumDays {
NONE = 0,
SUN = 1,
MON = 2,
TUE = 4,
WED = 8,
THU = 16,
FRI = 32,
SAT = 64,
ALL = 127
}
If I pass a value of 5, which represents SUN & TUE (1 + 4 = 5).
I intend to receive "SUN" & "TUE" as the output. How can this be achieved?
To tackle this task, one method is to iterate through the bits or enum members. The bit iteration approach appears more streamlined. Here, we exploit the fact that EnumDays links values to keys (for example, 1 corresponds to SUN) and keys to values (SUN corresponds to 1). It's worth noting that this method may not identify an enum value of 2147483648. Using 1 << 31, resulting in -2147483648, will provide a solution.
function getDayNames(value: EnumDays) {
let names = [];
for (let bit = 1; bit != 0; bit <<= 1) {
if ((value & bit) != 0 && bit in EnumDays) {
names.push(EnumDays[bit]);
}
}
return names;
}
As a newcomer to Angular 2, I find myself encountering a hurdle in filtering unnecessary data from a JSON object that is retrieved from a REST API. Below is an example of the JSON data I am working with: { "refDataId":{ "rdk":1, "refDataTy ...
Within the x.component.ts, I initiate the getSomething() method from y.service.ts. Since this method returns an observable, I subscribe to it. However, I encounter a peculiar issue where an object with 4 elements, one being an array of number arrays (numbe ...
I am currently utilizing Prisma with a MySQL database. Whenever I attempt to create a new record (School), an error of type pops up in the console. Additionally, I am implementing a framework called Remix.run, although it does not seem to be causing the is ...
Striving to incorporate lazy loading in Angular 2, I have successfully implemented lazy loading by following this helpful guide. Within my application, I have two components - home1 and home2. Home1 showcases the top news section, while home2 is dedicated ...
Within my Angular2 application, I have a class that includes several properties which will be assigned values within components. @Injectable() export class Globals { private token: string; private authorization: string; private roleUser: boole ...
I have a calendar component that has a data property marked as @Input(): import { Component, OnInit, Input, OnChanges, SimpleChanges } from '@angular/core'; @Component({ selector: 'app-calendar', templateUrl: './calendar.comp ...
Recently, I came across a repository where I was exploring the structure of TypeScript projects. One interesting thing I found was their typings file: /** * react-native-extensions.d.ts * * Copyright (c) Microsoft Corporation. All rights reserved. * Li ...
Wondering if there is a way to effectively access and manipulate JSON data stored in a database using Angular. While researching online, I keep coming across methods for reading JSON files from the Asset Folder, which does not align with what I need. What ...
I am currently working on a Typescript MVC app and encountering an issue. When I try to extend my BaseController and override the ajaxMethod with different parameters, my transpiler throws an error. Any help would be appreciated. Below is the code snippet ...
I am looking to define the type of binding items so that I am able to utilize components similar to functions. For instance, consider a component: angular.module('app').component('navBar', new NavBar()); class NavBar{ public bin ...
Currently, I am working on implementing nested axios calls to create the desired object by making multiple API requests. However, I am facing an issue where the state updates before all requests have finished, causing my table to populate entry by entry ...
Currently, I am in the midst of exploring the world of Node.js projects, delving into different bundlers and various other components. One interesting concept that came to mind is the idea of bundling Node.js into a single binary for Linux, macOS, or Windo ...
I am looking to develop an NPM package that organizes imports into modules for better organization. Currently, when I integrate my NPM package into other projects, the import statement looks like this: import { myFunction1, myFunction2 } from 'my-pac ...
Currently, I am in the process of following a tutorial to implement Asynchronous validation in Angular. The goal is to create a custom validator named shouldBeUnique that will be triggered after a 2-second delay. To achieve this, I have utilized the setTim ...
Seeking assistance with a Vue 3 and Vuelidate issue. I followed the configuration guide provided at . <script lang="ts"> import { required, minLength, maxLength, numeric } from '@vuelidate/validators' import useVuelidate from &apo ...
When working with TypeScript, I am facing an issue. I have an array defined as Array<string|undefined, and my goal is to filter out the undefined values from this array and assign the resulting array to a variable of type Array<string>. However, I ...
Within my component.ts class, I have defined an interface called Country: export interface Country{ id: String; name: String; checked: false; } const country: Country[] = [ { id: 'India', name: 'India', checked: false}, { ...
Currently, I am focused on managing products and categories These are the two types I have created: type Category = { parent: Category | null; // Is this acceptable? name: String; }; type Product = { categories: Category[]; name: String; ...
When attempting to organize three instances of app-story-preview within a wrapper div using a ngFor loop, I encountered the following code: <ng-template [ngIf]="stories.length > 0" [ngIfElse]="empty"> <cdk-virtual-scroll-viewport [itemSize ...
Scenario Within the file ts/app.ts, the following function exists: function foo() { console.log('Hello Word'); } After successful compilation with Webpack, it generates a file named bundle.js. To load this file, use the following script tag ...