Angular 2 TypeScript 如何在数组中查找元素 [英] Angular 2 TypeScript how to find element in Array
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问题描述
我有一个组件和一个服务:
I have a Component and a Service:
组件:
export class WebUserProfileViewComponent {
persons: Person [];
personId: number;
constructor( params: RouteParams, private personService: PersonService) {
this.personId = params.get('id');
this.persons = this. personService.getPersons();
console.log(this.personId);
}
}服务:
@Injectable()
export class PersonService {
getPersons(){
var persons: Person[] = [
{id: 1, firstName:'Hans', lastName:'Mustermann', email: 'mustermann@test.com', company:'Test', country:'DE'},
{id: 2, firstName:'Muster', lastName:'Mustermann', email: 'mustermann@test.com', company:'test', country:'DE'},
{id:3, firstName:'Thomas', lastName:'Mustermann', email: 'mustermannt@tesrt.com', company:'test', country:'DE'}
];
return persons;
}
}我想获取带有 Id ('personID') 的 Person Item.我从 Routeparam 获得的 personID.为此，我需要 foreach 循环?但我还没有找到解决方案.
I want to get the Person Item with the Id ('personID'). The personID i get from Routeparam. For that I need the foreach loop? But I haven´t found a solution for this.
推荐答案
您需要使用方法 Array.filter:
You need to use method Array.filter:
this.persons = this.personService.getPersons().filter(x => x.id == this.personId)[0];
this.persons = this.personService.getPersons().find(x => x.id == this.personId);
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