index.js

// Implement the class SubrectangleQueries which receives a rows x cols rectangle as a matrix of integers in the constructor and supports two methods:

// 1. updateSubrectangle(int row1, int col1, int row2, int col2, int newValue)

// Updates all values with newValue in the subrectangle whose upper left coordinate is(row1, col1) and bottom right coordinate is(row2, col2).
// 2. getValue(int row, int col)

// Returns the current value of the coordinate(row, col) from the rectangle.


//     Example 1:

// Input
// ["SubrectangleQueries", "getValue", "updateSubrectangle", "getValue", "getValue", "updateSubrectangle", "getValue", "getValue"]
// [[[[1, 2, 1], [4, 3, 4], [3, 2, 1], [1, 1, 1]]], [0, 2], [0, 0, 3, 2, 5], [0, 2], [3, 1], [3, 0, 3, 2, 10], [3, 1], [0, 2]]
// Output
// [null, 1, null, 5, 5, null, 10, 5]
// Explanation
// SubrectangleQueries subrectangleQueries = new SubrectangleQueries([[1, 2, 1], [4, 3, 4], [3, 2, 1], [1, 1, 1]]);
// // The initial rectangle (4x3) looks like:
// // 1 2 1
// // 4 3 4
// // 3 2 1
// // 1 1 1
// subrectangleQueries.getValue(0, 2); // return 1
// subrectangleQueries.updateSubrectangle(0, 0, 3, 2, 5);
// // After this update the rectangle looks like:
// // 5 5 5
// // 5 5 5
// // 5 5 5
// // 5 5 5 
// subrectangleQueries.getValue(0, 2); // return 5
// subrectangleQueries.getValue(3, 1); // return 5
// subrectangleQueries.updateSubrectangle(3, 0, 3, 2, 10);
// // After this update the rectangle looks like:
// // 5   5   5
// // 5   5   5
// // 5   5   5
// // 10  10  10 
// subrectangleQueries.getValue(3, 1); // return 10
// subrectangleQueries.getValue(0, 2); // return 5

// Solution

class SubrectangleQueries {
    constructor(rectangle) {
        this.rectangle = rectangle;
    }
}

SubrectangleQueries.prototype.updateSubrectangle = function (row1, col1, row2, col2, newValue) {
    for (let i = row1; i <= row2; ++i) {
        for (let j = col1; j <= col2; ++j) {
            this.rectangle[i][j] = newValue;
        }
    }
};

SubrectangleQueries.prototype.getValue = function (row, col) {
    return this.rectangle[row][col]
};