PowerShell sort array

Question

My array is spits out this.

a10
a11
a12
a6
a7
a8
a9

Any short/simple code to fix it to:

a6
a7
a8
a9
a10
a11
a12

Shay Levy · Accepted Answer · 2012-03-01 17:26:15Z

11

You can sort by expression, take everything after the first letter and cast it to integer:

$array | sort { [int]$_.substring(1)}

You can also make the solution more generic by removing any non-digit characters:

$array | sort { [int]($_ -replace '\D')}

edited Mar 1, 2012 at 17:26

answered Mar 1, 2012 at 16:34

Shay Levy

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2 Comments

basickarl Over a year ago

Your second line "$array | sort { [int]($_ -replace '\D')}" was able to fix my array filled with "2012-03-02_log-X.txt". Thank you!

JoeBrockhaus Over a year ago

FYI: If you just have an array of string (and smart-numbering is an issue), all you need is $array | sort

Joey · Accepted Answer · 2012-03-01 15:30:51Z

5

The easiest way in this case would be to zero-pad all numbers and use that for sorting:

$a | sort {
  [Regex]::Replace($_, '\d+', 
  {
    $args[0].Value.PadLeft(10, '0')
  })
}

answered Mar 1, 2012 at 15:30

Joey

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2 Comments

CB. Over a year ago

@Joey $a | sort { $_ -replace '\d+' , $_.padleft(10,'0') } is good the same? or there is something wrong in this way?

Joey Over a year ago

There is. $_ refers to the complete item, not the match in your case. Therefore the result isn't a0000000001 but a00000000a1. It probably ceases to work with multiple numbers in a string, although I'm too tired now to try. The solution above should yield a »natural« sort with almost any list of strings that contain numbers.

jon Z · Accepted Answer · 2012-03-01 20:12:27Z

3

These are hex values, right? ;-)

$array | sort {[convert]::toint32("$_",16)}

answered Mar 1, 2012 at 20:12

jon Z

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Comments

SendETHToThisAddress · Accepted Answer · 2023-05-03 21:22:31Z

0

You can simply use the sort method.

$myArray = $myArray | Sort-Object;

Some other answers may be more efficient regarding the particular array shown in the question, but in general this will do.

Credit: Add, Modify, Verify, and Sort Your PowerShell Array - Dr. Scripto

answered May 3, 2023 at 21:22

SendETHToThisAddress

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