I'm trying to insantiate an object with a 2 dimensional array but the following code doesn't seem to work:
class Board {
constructor(row,col){
this.board=[];
for (var i=0; i<row; i++){
for (var y=0; y<col; y++){
this.board[i][y]=0;
}
}
}
}
var board = new Board(10,10);
You need to init the sub-array before you can fill it with numbers - this.board[i] = [];:
class Board {
constructor(row,col){
this.board=[];
for (var i=0; i<row; i++){
this.board[i] = []; // init this.board[i]
for (var y=0; y<col; y++){
this.board[i][y]=0;
}
}
}
}
var board = new Board(10,10);
console.log(board);You can also use Array.from() to init the board:
class Board {
constructor(row,col){
this.board = Array.from({ length: row }, () =>
Array.from({ length: col }, () => 0)
);
}
}
const board = new Board(10,10);
console.log(board);Collected from the Internet
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