LeetCode力扣 119. 楊輝三角 II Pascals Triangle II 題解代碼 JavaScript

問題 https://leetcode-cn.com/problems/pascals-triangle-ii/

練習使用JavaScript解答

 

/**
 * @param {number} rowIndex
 * @return {number[]}
 */
var getRow = function(rowIndex) {
    var arr = [1], t1, t2;
    for(var i=1;i<=rowIndex;++i) {
        t1 = 1;
        for(var j=1;j<=i;++j) {
            t2 = 0;
            if(arr[j])
                t2 = arr[j];
            arr[j] = t1 + t2;
            t1 = t2;
        }
    }
    return arr;
};