1. Problem
You want to convert a string to uppercase or lowercase.
2. Solution
Use the ToUpper() and ToLower() methods of the string to convert it to uppercase and lowercase, respectively.
To convert a string to uppercase, use the ToUpper() method:
        PS >”Hello World”.ToUpper()
        HELLO WORLD

To convert a string to lowercase, use the ToLower() method:
        PS >”Hello World”.ToLower()
        [...]

1. Problem
You want to compare some data with other data and make a decision based on that comparison.
2. Solution
Use PowerShell’s logical operators to compare pieces of data and make decisions based on them.

Comparison operators:
-eq, -ne, -ge, -gt, -lt, -le, -like, -notlike, -match, -notmatch, -contains, -notcontains, -is, -isnot

Logical operators:
-and, -or, -xor, -not
For a detailed [...]

1. Problem
You want to know how long a command takes to execute.
2. Solution
To measure the duration of a command, use the Measure-Command cmdlet:
        PS >Measure-Command { Start-Sleep -Milliseconds 337 }

        Days              : 0
        Hours             : 0
        Minutes           : 0
        Seconds           : 0
        Milliseconds      : 339
        Ticks             : 3392297
        TotalDays         : 3.92626967592593E-06
        TotalHours        : 9.42304722222222E-05
        TotalMinutes      [...]

1. Problem
You want to get the system date.
2. Solution
To get the system date, run the command Get-Date.
3. Discussion
The Get-Date command generates rich object-based output, so you can use its result for many date-related tasks. For example, to determine the current day of the week:
        PS >$date = Get-Date
        PS >$date.DayOfWeek
        Sunday

For more information about the [...]

1. Problem
You want to run a PowerShell command.
2. Solution
To run a PowerShell command, type its name at the command prompt. For example:
        PS >Get-Process

        Handles  NPM(K)    PM(K)    WS(K)   VM(M)  CPU(s)    Id ProcessName
        ——-  ——    —–    —–   —–  ——    — ———–
            133       5    11760     7668      46          1112 audiodg
            184       5    33248      508      93          1692 avgamsvr
        [...]

1.2.1. Problem
You rely on a lot of effort invested in your current tools. You have traditional executables, Perl scripts, VBScript, and of course, a legacy build system that has organically grown into a tangled mess of batch files. You want to use PowerShell, but don’t want to give up everything you already have.

1.2.2. Solution
To run [...]