https://leetcode.com/problems/set-matrix-zeroes/

SetMatrixZeroes.swift

class Solution {
    func setZeroes(_ matrix: inout [[Int]]) {
        
        if matrix.isEmpty {
            return
        }
        
        struct Coordinate: Equatable, Hashable {
            var row: Int
            var column: Int
        }
        
        var zerosIndex = Set<Coordinate>()
        
        for (eachRowIndex, eachRow) in matrix.enumerated() {
            for (eachColumnIndex, eachColumnValue) in eachRow.enumerated() {
                if eachColumnValue == 0 {
                    let coordinate = Coordinate(row: eachRowIndex, column: eachColumnIndex)
                    zerosIndex.insert(coordinate)
                }
            }
        }
        
        for eachCoordinates in zerosIndex {
            
            for (eachRowIndex, eachRow) in matrix.enumerated() {
                
                for (eachColumn, eachColumnValue) in eachRow.enumerated() {
                    if eachCoordinates.column == eachColumn {
                        matrix[eachRowIndex][eachCoordinates.column] = 0
                    }
                    
                    if eachCoordinates.row == eachRowIndex {
                        matrix[eachCoordinates.row][eachColumn] = 0
                    }
                }
            }
            
        }
    }
}