I'm creating a quiz app for practice and needs to display one MCQ at a time. Coded the following but facing an error as said in title.
By googling other similar questions on Stack Overflow,I did try their solutions: Tried console logging, if there was any file missing from Node_Modules/typescript but everything was perfect. Also tried to update Node_Modules and CLI to latest version, but no luck.
Quiz.component.ts:
export class QuizComponent implements OnInit {
radio1: string;
value: string;
target: any;
quizName = 'QUIZ APPLICATION';
counter=0;
questArray: any[];
questArray1:any[];
questArray2: any[];
constructor(private newService: MyDataService) //service define
{ }
ngOnInit() {
this.newService.fetchData()
.subscribe(response => this.questArray = response.json());
` `
this.callingArray();
}
callingArray() {
for(var i=0;i<=this.questArray.length;i++)
{
this.questArray1=this.questArray[i];
this.questArray2=this.questArray[i+1];
}
}
Service.ts:
export class MyDataService {
constructor(private http: Http)
{}
fetchData()
{
return this.http
.get('../assets/questions.json');
}
}
I'm really not getting what is being missed!
JSON:
[
{
"QUES":"The Government of India (GoI) has launched the web-based application e-FRRO scheme for foreigners. What does ‘FRRO’ stands for ?",
"OP":[ "Foreigners Regional Registration Office", "Foreigners Registry Registration Office", "Foreigners Reacceptance Registration Office", "Foreigners Regaining Registration Office" ]
},
{
"QUES": "H",
"OP":["ADASD" , "ASDAD", "ASDASD", "ASDADS"]
}
]
HTML:
<div *ngFor="let abc of questArray1;let j = index" >
{{j+1}}.{{abc.QUES}}
<br>
<input type="radio" name="s">{{abc.OP[j]}}
<br>
<input type="radio" name="s">{{abc.OP[j]}}
<br>
<input type="radio" name="s">{{abc.OP[j]}}
<br>
<input type="radio" name="s">{{abc.OP[j]}}
<br>
</div>
your array iteration happens before you get any data from observable. try modifying your code to something like this:
this.newService.fetchData().subscribe(response => {
this.questArray = response.json();
this.callingArray();
});
Collected from the Internet
Please contact [email protected] to delete if infringement.
Comments