posts-powershell

Numeric types can store numbers in certain ranges. A byte for example stores values in the range 0-255. But do you know just what the range is for...

If you need to determine the days in a given month, you can use the static DaysInMonth() function provided by the DateTime type. As you can see, the...

You will find that the DateTime type supports a number of static methods to check dates. For example, you can check whether a year is a leap year...

Objects contain useful methods to access the object data. For example, DateTime objects support methods to display the date and time in various...

Unfortunately, PowerShells special ".." operator only supports numeric ranges: 1..10 You can use type conversion to get a range of...

Type conversion can help you count special characters in a text. For example, if you'd like to find out the number of tab characters in a text,...

In PowerShell, you can do multiple sequential type conversions. For example, you should first convert the string into a character array and then...

You will find that type conversion can do amazing things. For example, the next line accesses a system log by converting the log name to an EventLog...

In a previous tip, you learned about how to access WMI instances directly using their individual instance path. Here is how you can find that path...

If you know the path to a WMI instance, you can access it directly by converting the WMI path to a WMI object:...

PowerShell has a few shortcuts for popular .NET types like [WMI], [ADSI] or [Int]. You should read the FullName property if you'd like to know...

When you compare version strings, PowerShell will use alphanumeric algorithms, which may lead to confusing results: '3.4.22.12' -gt...

A hidden object property called "PSTypeNames" will tell you the object type as well as the inherited chain: (Get-WMIObject...

For tricky validation checks, you should use arbitrary PowerShell code to validate. The function Copy-OldFiles will only accept files (no folders)...

Let's say you'd like to set the PowerShell console cursor size. This size must be a number between 0 and 100. The following template will...

Once you know the name of an object type, you can use that type for conversion. The next line converts a string into a date-time type: [DateTime]...

Anything in PowerShell is an object. You can use GetType() to get the object type:...

Function parameters can be validated using standard regular expressions. For example, the next template function accepts only valid Knowledge Base...

If a function parameter should receive a string of a given length only, you should use the following validation attribute. In the example, it limits...

Function parameters can receive multiple values when they accept arrays. You should use this template to limit the number of values acceptable:...

Your functions can have properties with built-in alias names. The user can then either use the descriptive "long" name or its short and...

If you need to limit a function parameter to only a set of allowed choices, you should use the next example: function Get-24hEventLogEntries...

Finding cmdlets by name is easy: Get-Command *service* -commandType Cmdlet But how can you list all cmdlets that support a given parameter? If...

You'd probably like to regularly clean your machine and remove all cookies set by Web sites you may have visited? Here is how: Dir...

Have you ever wanted to find out who stored your information while you were surfing the Web? Check out your cookies folder: Dir...

Windows uses the special recents folder to remember which files you have opened. You can have a look to check what Windows has stored: Dir...

Changing file extensions can be a quick one-line operation. The next line renames all ps1 PowerShell script files found in your user profile and...

PowerShell can read plain text, but it can also read binary content. Here is a little function that creates a "hex dump" of any binary...

File types are not entirely dependent on file extension. Rather, binary files have internal ID numbers called "magic numbers" that tell...

The .NET System.IO.Path class has a number of very useful static methods that you can use to extract file extensions. Here is how you can get a list...