Currently, in the process of learning TypeScript as my second language, I am encountering some challenges with arrays.
I have observed peculiar behavior when accessing the list with a variable as opposed to a hardcoded number.
The code snippet in question is:
class Game {
data: Array<Array<cell>>;
size: number;
constructor () {
this.data = [];
this.size = 20;
}
initialiseGame() {
// array of arrays full of cells created here
this.data = []
for (let row = 0; row < this.size; row++) {
this.data.push([]);
for (let col = 0; col < this.size; col++){
this.data[row][col] = new cell(row, col);
}
// console.log output is as expected at this point
this.plantBombs();
}
getRandomInt(max: number): number {
return Math.floor(Math.random() * max)
}
plantBombs() {
let randomX, randomY, bombsPlanted = 0;
while (bombsPlanted < this.bombs){
randomX = this.getRandomInt(this.size);
randomY = this.getRandomInt(this.size);
// console.log(this.data[0][0]) shows correct value
// this.data[randomX] returns undefined
// this.data[randomX][randomY] throws "cannot read properties of undefined" error
if (!this.data[randomX][randomY].isMine){
this.data[randomX][randomY].isMine = true;
bombsPlanted ++;
}
}
}
}
I utilized Number.isInteger() to verify that the value is an integer and also attempted passing this.data to plantBombs().
Wondering if my approach to accessing the array data is incorrect, or if there might be a simple oversight on my part?