class PascalTriangle {

  constructor(n) {

    this.n = n;

  }

​

  factoriel(m) {

    let result = 1;

    if (m === 0) {

      return 1;

    }

    while (m > 0) {

      result *= m;

      m--;

    }

    return result;

  }

  fill() {

    let arr = [];

    for (let i = 0; i < this.n; i++) {

      arr.push([]);

    }

​

    for (let i = 0; i < arr.length; i++) {

      for (let j = 0; j <= i; j++) {

        arr[i].push(this.factoriel(i) / (this.factoriel(j) * this.factoriel(i - j)));

      }

    }

​

    return arr;

  }

}