Array in Powershell WON'T be written as an Array

问题

No matter how I write this script, Powershel will not write my array as it should, it prints a single line array.

PS C:\Windows\system32> $matriz = @(
(1,2,3,4),
(5,6,7,8)
)

Write-Host $matriz
1 2 3 4 5 6 7 8

Neither this way:

PS C:\Windows\system32> $matriz = ,@((1,2,3,4),
(5,6,7,8))

Write-Host $matriz
1 2 3 4 5 6 7 8

How do I print this as a real 2-dimension matrix?
And... I'm trying to populate this same array with Get-Random, but it shows the following error: Failed add the number where you want (i.e. matriz [0,1]) because it doesn't support fractions <- Not the real message but you guys won't understand portuguese :/

*Update:
I want it to be printed as this:
1 2 3 4
5 6 7 8
'Cause the single line thing won't help me to see if my matrix is correct, as a single line I will never know what is in the array's diagonal line.

回答1:

So when you output an array, powershell by default outputs each array item on a new line. Here is one way to get what I think you want:

Write-Host $matriz | %{$_ -join ' '}

So you tell it to go ahead and use the new line for the outside array, but for each of the inside arrays join them using spaces.

回答2:

That is how a two dimensional array prints. If you want to display it in some other way, you'll need to format it yourself:

$matriz  = @((1,2,3,4),(5,6,7,8))

$matriz  | ForEach-Object {
    $_ | ForEach-Object {
        Write-Host ("{0,5}" -f $_) -NoNewline;
    }
    Write-Host;
}

You're also not calling matrix elements correctly. $matriz[1,1], for example, actually means (,$matriz[1] + ,$matriz[1]). That's because 1,1 is itself an array.

What you'd need to do to properly find single elements is to use multiple indexes: $matriz[1][1]

回答3:

This uses a trick but will make it print in two lines:

$matriz = ,@(1,2,3,4)+,@(5,6,7,8)
$matriz | % {Write-Host $_ }

Output is:

1 2 3 4
5 6 7 8

Each item can be individually referenced as $matriz[x][y] where x,y are the sizes of the two dimentional array (As Bacon said).

来源：https://stackoverflow.com/questions/27608099/array-in-powershell-wont-be-written-as-an-array

标签

arrays

powershell

dynamic-arrays