After trying to log the dictionary using
console.log(JSON.stringify(this.idTitleDict))this.getTemplates() to populate the dictionary, then next in line is iterating over it. However, it appears to be empty at that point when I try to log it to the console after passing the dict to JSON.stringify().
In the ngOnInit method of a component in my Angular app, I attempt to loop over a dictionary to retrieve the first key and then break out of the loop. Unfortunately, it doesn't seem to iterate over.
The structure of the dictionary is as follows:
{
1: "title",
2: "title",
3: "title",
4: "title",
5: "title",
6: "title"
}
I have tried the following approaches:
const keys = Object.keys(this.idTitleDict);
for (const key in keys) {
if (this.idTitleDict.hasOwnProperty(key)) {
console.log(key);
this.showContent(key);
break;
}
}
and also:
for (const key in this.idTitleDict) {
if (this.idTitleDict.hasOwnProperty(key)) {
console.log(key);
this.showContent(key);
break;
}
}
and additionally:
for (const key in Object.keys(this.idTitleDict)) {
if (this.idTitleDict.hasOwnProperty(key)) {
console.log(key);
this.showContent(key);
break;
}
}
No logs appear in the console and this.showContent() does not get executed. Despite confirming that the dictionary is populated, as checked in another function where another dictionary is looped over without any issues:
getTemplates() {
this.apiService.getTemplates().subscribe(
(data: any) => {
for (const key in data) {
if (data.hasOwnProperty(key)) {
this.idTitleDict[key] = data[key].title;
}
}
}
);
}
The complete ngOnInit method looks like this:
ngOnInit() {
this.getTemplates();
const keys = Object.keys(this.idTitleDict);
console.log(this.idTitleDict); // This displays the populated dictionary mentioned above
for (const key in Object.keys(this.idTitleDict)) {
if (this.idTitleDict.hasOwnProperty(key)) {
console.log(key);
this.showContent(key);
break;
}
}
}
The dictionary is declared as follows:
idTitleDict: { [id: string]: string; } = {};
It gets populated in this method:
getTemplates() {
this.apiService.getTemplates().subscribe(
(data: any) => {
for (const key in data) {
if (data.hasOwnProperty(key)) {
this.idTitleDict[key] = data[key].title;
}
}
}
);
}
I may have overlooked something, but I'm completely stuck at this point.