Question

How to convert a matrix of numbers to a string in Swift

Answer 1

import Foundation

let matrix = [
    [ 4,  7,  9, 18, 29, 0],
    [ 1,  9, 18, 99,  4, 3],
    [ 9, 17, 89,  2,  7, 5],
    [19, 49,  6,  1,  9, 8],
    [29,  4,  7,  9, 18, 6]]
    
let matrixString = matrix.map { $0.map(String.init).joined(separator: " ") }.joined(separator: "\n")

print(matrixString)



/*
run:

4 7 9 18 29 0
1 9 18 99 4 3
9 17 89 2 7 5
19 49 6 1 9 8
29 4 7 9 18 6

*/

 

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Answer 2

import Foundation

let matrix = [
    [ 4,  7,  9, 18, 29, 1],
    [ 1,  9, 18, 99,  4, 7],
    [ 9, 17, 89,  2,  7, 9],
    [19, 49,  6,  1,  9, 0],
    [29,  4,  7,  9, 18, 6]]
    
let matrixString = matrix.map { "[" + $0.map(String.init).joined(separator: ", ") + "]" }.joined(separator: "\n")

print(matrixString)



/*
run:

[4, 7, 9, 18, 29, 1]
[1, 9, 18, 99, 4, 7]
[9, 17, 89, 2, 7, 9]
[19, 49, 6, 1, 9, 0]
[29, 4, 7, 9, 18, 6]

*/

 

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