Confused about the functionality of the map feature in Angular

I am new to Angular and currently working on an application that utilizes the typeahead functionality. I have set up a HTTP call through my Express backend on GCP to fetch search results from the TMDB database based on a search keyword.

this.http
      .get<any>('https://hw8-308202.wl.r.appspot.com/search?search='+term).pipe(
        map(data => data
        ))
        .subscribe(data => console.log(data));

After making the call, I receive a response like this -

[
    {
        "id": 10255,
        "backdrop_path": "NA",
        "media_type": "movie",
        "title": "Ab-normal Beauty"
    },
    {
        "id": 1320678,
        "backdrop_path": "NA",
        "media_type": "person",
        "title": "NA"
    },
    {
        "id": 131563,
        "backdrop_path": "NA",
        "media_type": "person",
        "title": "NA"
    },
    {
        "id": 259172,
        "backdrop_path": "/iZfCRsA9wcTZ0yWsuhXSHe4krdy.jpg",
        "media_type": "movie",
        "title": "Beyond the Great Wall"
    },
    {
        "id": 115301,
        "backdrop_path": "NA",
        "media_type": "person",
        "title": "NA"
    },
    {
        "id": 107531,
        "backdrop_path": "NA"
        "media_type": "person",
        "title": "NA"
    },
    {
        "id": 1820070,
        "backdrop_path": "NA",
        "media_type": "person",
        "title": "NA"
    }
]

However, instead of iterating over each JSON object as expected, the entire response is being treated as a single iteration. I am struggling to extract only the title from each individual result. Any tips on how to achieve this?

Answer №1

The concept discussed here is related to array.map. In Observable, the usage of map differs from the typical implementation. To apply it correctly, follow this approach.

this.http.get<any>('https://hw8-308202.wl.r.appspot.com/search?search='+term).pipe(
   map(data => {
     const titles: string[] = [];
     for (const e of data) {
       titles.push(e.title);
     }
     return titles;
   })
).subscribe(data => console.log(data));

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