I am trying to access elements of this multidimensional array and getting strange results like : &#0-CodePudding

  let BestAlbumsByGenre = [];
    BestAlbumsByGenre [0]  = "Country";
    BestAlbumsByGenre [0][0] = "Johnny Cash : Live at Folsom Prison";
    BestAlbumsByGenre [0][1] = "Patsy Cline : Sentimentally Yours";
    BestAlbumsByGenre [0][2] = "Hank Williams : I'm Blue Inside";
    BestAlbumsByGenre [1] = "Rock";
    BestAlbumsByGenre [1][0] = "T-Rex : Slider";
    BestAlbumsByGenre [1][1] = "Nirvana : Nevermind";
    BestAlbumsByGenre [1][2] = "Lou Reed : Transformer";
    BestAlbumsByGenre [2] = "Punk";
    BestAlbumsByGenre [2][0] = "Flipper : Generic";
    BestAlbumsByGenre [2][1] = "The Dead Milkmen";
    BestAlbumsByGenre [2][2] = "Patti Smith : Easter";
    
  console.log(BestAlbumsByGenre[0][1]);

this is my code.

If I want to access the BestAlbumsByGenre[0][1], it should return "Patsy Cline : Sentimentally Yours"; But it's returning the character 'o', maybe it's returning the 2nd character of 0th element, String "Country", but if it so then why? thanks in advance.

CodePudding user response：

After BestAlbumsByGenre [0] = "Country", which sets a string as 0th entry in the array, BestAlbumsByGenre [0][0] = "Johnny Cash : Live at Folsom Prison" has no effect any more. BestAlbumsByGenre[0][1] returns the 1st character in that string.

Consider a different data structure, for example:

BestAlbumsByGenre[0] = {Genre: "Country", Albums: []};
BestAlbumsByGenre[0].Albums[0] = "Johnny Cash : Live at Folsom Prison";

CodePudding user response：

I don't think you understand multidimensional array structures in javascript at all. Does this example make their structure clearer?

let BestAlbumsByGenre = [];
BestAlbumsByGenre[0] = [
  "Country", // 0 0
  [ // 0 1
    "Johnny Cash : Live at Folsom Prison", // 0 1 0
    "Patsy Cline : Sentimentally Yours", // 0 1 1
    "Hank Williams : I'm Blue Inside" // 0 1 2
  ]
]; //etc...

console.log(BestAlbumsByGenre[0][0]);  //Country
console.log(BestAlbumsByGenre[0][1][1]); //Patsy Cline : Sentimentally Yours