Team members

Just started diving into Angular and practicing coding with it while following video tutorials. However, I've stumbled upon something in my code that has left me puzzled.

I'm curious about the significance of the line "employees: Employee[]" in the component file.

Below is my model code:

export class Employee{
    id: number;
    name: string;
    gender: string;
    phoneNumber: number;
    contactPreference: string;
    dateOfBirth: Date;
    department: string;
    isActive: boolean;
    photoPath: string;
}

And here's my component snippet containing employees data:

employees: Employee[]=[{
    id: 1,
    name: 'Kennedy',
    gender: 'Male',
    phoneNumber: 123,
    contactPreference: 'Email',
    dateOfBirth: new Date('10/25/2019'),
    department: 'IT',
    isActive: true,
    photoPath: 'http://www.landscapingbydesign.com.au/wp-content/uploads/2018/11/img-person-placeholder-300x300.jpg'
},

Appreciate your help in advance!

Answer №1

employees: Employee[]=[{
    id: 1,
    name: 'Kennedy',
    gender: 'Male',
    phoneNumber: 123,
    contactPreference: 'Email',
    dateOfBirth: new Date('10/25/2019'),
    department: 'IT',
    isActive: true,
    photoPath: 'http://www.landscapingbydesign.com.au/wp-content/uploads/2018/11/img-person-placeholder-300x300.jpg'
    },

This particular piece of code represents a class variable named employees, which is an array consisting of objects of type Employee with an initial value assigned to it.

The concept here is to have a structured model (Employee) that defines the properties and types expected within each object. For instance:

The model includes properties like id: number, name: string;

If you mistakenly assign id as a string instead of a number, TypeScript compiler will catch this error during compilation rather than running into issues at runtime in plain JavaScript.

By adhering to such structured models, you can minimize errors and ensure your code runs smoothly in the long run.

Answer №2

staff is a collection of Workers.

Answer №3

When you see the syntax:

name: Type[]

What it means is that you are dealing with an array of items that are categorized as Type. This concept is similar to how a Mongoose schema would look like:

employees: [Employee]

The difference lies in the syntax, which resembles strongly-typed languages such as Swift.

If you try to add different types into this structure, errors will be thrown. For instance, if you attempt something like this:

data: object[];
data.push("A String");

The TypeScript compiler will generate an error message:

Error TS2345: Argument of type '"A String"' is not assignable to parameter of type 'object'.

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