Question

How to create an array from a 2D array that only includes the non-zero elements in Swift

Answer 1

import Foundation

let array = [
    [1, 0, 8, 2],
    [0, 7, 3, 0],
    [9, 0, 0, 4]
]

var nonZeroArray = [Int]()

// Collect non-zero elements
for row in array {
    for element in row {
        if element != 0 {
            nonZeroArray.append(element)
        }
    }
}

for element in nonZeroArray {
    print("\(element) ", terminator: "")
}




/*
run:

1 8 2 7 3 9 4 

*/

 

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