1. Problem
You want to control the way that PowerShell displays or formats a date.
2. Solution
To control the format of a date, use one of the following options:
The Get-Date cmdlet’s –Format parameter:
PS >Get-Date -Date “05/09/1998 1:23 PM” -Format “dd-MM-yyyy @ hh:mm:ss”
09-05-1998 @ 01:23:00
PowerShell’s string formatting (–f) operator:
PS >$date = [DateTime] “05/09/1998 1:23 PM”
PS >”{0:dd-MM-yyyy @ hh:mm:ss}” [...]

1. Problem
You have a list of items and want to work with each item in that list.
2. Solution
Use the Foreach-Object cmdlet (which has the standard aliases foreach and %)to work with each item in a list.
To apply a calculation to each item in a list, use the $_ variable as part of a calculation in [...]

Recipe 2.1. Filter Items in a List or Command Output
1. Problem
You want to filter the items in a list or command output.
2. Solution
Use the Where-Object cmdlet (which has the standard aliases, where and ?) to select items in a list (or command output) that match a condition you provide.
To list all running processes that have [...]

1. Problem
You want to manage the detailed debug, verbose, and progress output generated by cmdlets and scripts.
2. Solution
To enable debug output for scripts and cmdlets that generate it:
       
        $debugPreference = “Continue”
        Start-DebugCommand

To enable verbose mode for a cmdlet that checks for the -Verbose parameter:
        Copy-Item c:\temp\*.txt c:\temp\backup\ -Verbose

To disable progress output from a script [...]

1. Problem
You want to display detailed information about errors that come from commands.
2. Solution
To list all errors (up to $MaximumErrorCount) that have occurred in this session, access the $error array:
        $error

To list the last error that occurred in this session, access the first element in the $error array:
        $error[0]

To list detailed information about an [...]

1. Problem
You want to redirect the output of a pipeline into a file.
2. Solution
To redirect the output of a command into a file, use either the Out-File cmdlet or one of the redirection operators.
Out-File:
       
        Get-ChildItem | Out-File unicodeFile.txt
        Get-Content filename.cs | Out-File -Encoding ASCII file.txt
        Get-ChildItem | Out-File-Width 120 unicodeFile.cs

Redirection operators:
        Get-ChildItem > files.txt
        [...]