Format command output in powershell-CodePudding

I have a output like below from a command

IpPrefix
--------
15.181.232.0/21
142.4.160.136/29
3.2.0.0/24
161.188.154.0/23

Using above output, need write a command in powershell to get format like :

15.181.232.0/21,142.4.160.136/29,3.2.0.0/24,161.188.154.0/23

Basically combine multiple lines to one line with comma separated. Please help.

CodePudding user response：

Welcome to PowerShell! The results of commands are objects. This object you have made has at least 1 property called IpPrefix. If your object is stored in a variable $object, then you can reference the property like this:

$object = (some-command -param something)
$object.IpPrefix

Once you're got the items in just that one column, without the column header, you now have an array of strings. They're still objects, but they are string objects.

The -join operator works against arrays.

$object = (some-command -param something)
$object.IpPrefix -join ','

This will give you what you want in the simplest way possible.

Let's say maybe you don't want to store your data in a variable (aka in Memory). You might have a pipeline or some other situation where storing the data slows you down. You would do that like this:

(some-command -param something).IpPrefix -join ','

Same idea, different syntax. Hope this helps you understand the shell better!