Expression Expansion in Strings in Windows PowerShell

Q

What is expression expansion in strings in Windows PowerShell?

✍: FYIcenter.com

A

Expression expansion in strings is a short-hand of string concatenation operations using the following syntax rule:

When an expression enclosed in parentheses following a $ sign is included in a double-quoted string literal like "... $(expression) ...", it will be replaced with the string representation of the express result.

In other words, the following two expressions are identical:

"Leading text $($a*$b) trailing text."
"Leading text "+($a*$b)+" trailing text."

Here are some good examples of using expression expansion in a string:

PS C:\fyicenter> Write-Host "Current time is $( (Get-Date).TimeOfDay )."
Current time is 19:16:33.4997682.

PS C:\fyicenter> "Firefox virtual memory size = $( (Get-Process Firefox).VirtualMemorySize)."
Firefox virtual memory size = 1175629824.

⇒ String Comparison in Windows PowerShell

⇐ Variable Expansion in Strings in Windows PowerShell

⇑ Work with Strings in Windows PowerShell

⇑⇑ Windows PowerShell Tutorials

2016-10-19, ∼2678🔥, 0💬

Select String by Pattern in Windows PowerShell
How to select strings with a given pattern in Windows PowerShell? I want to find some specific text in strings. You can use the "Select-String" cmdlet to do string pattern match in Windows PowerShell. The Select-String cmdlet searches for text and text patterns in input strings and files. You can us... 2016-10-19, ∼4147🔥, 0💬

String Object Methods in Windows PowerShell
What methods are available on the string object in Windows PowerShell? I want to know which method to call to trim a string. A String object supports the following methods in Windows PowerShell: PS C:\fyicenter> "" | get-member -MemberType method TypeName: System.String Name MemberType Defini... 2016-10-19, ∼3968🔥, 0💬

String Concatenation in Windows PowerShell
How to concatenate strings in Windows PowerShell? I want to join two strings together. The easiest way to join two strings together is to use the concatenate operator (+) as shown in the example below: PS C:\fyicenter> $name = "John" PS C:\fyicenter> # using string concatenation operat... 2016-10-20, ∼3365🔥, 0💬

Variable Expansion in Strings in Windows PowerShell
What is variable expansion in strings in Windows PowerShell? Variable expansion in strings is a short-hand of string concatenation operations using the following syntax rule: When a variable is included in a double-quoted string literal like "... $variable ...", it will be replaced with the string r... 2016-10-20, ∼3290🔥, 0💬

Managing Remote Computer with Windows PowerShell
Where to find tutorials on managing remote computers with Windows PowerShell? Here is a collection of tutorials compiled by FYIcenter.com team on managing remote computers with Windows PowerShell. Remote Computing Overview in Windows PowerShell "Test-Connection" Cmdlet in Windows PowerShell Windows ... 2016-10-17, ∼3233🔥, 0💬

String Comparison in Windows PowerShell
How to compare two strings in Windows PowerShell? Windows PowerShell supports the following string comparison operations: -eq - Equal to -ne - Not equal to -gt - Greater than -ge - Greater than or equal to -lt - Less than -le - Less than or equal to -Like - Match with wildcard characters ? and * -No... 2016-10-19, ∼3163🔥, 0💬

Work with Strings in Windows PowerShell
Where to find tutorials on how to work with strings in Windows PowerShell? Here is a collection of tutorials compiled by FYIcenter.com team on working strings in Windows PowerShell. What Is String in Windows PowerShell String Concatenation in Windows PowerShell Variable Expansion in Strings in Windo... 2016-10-20, ∼3149🔥, 0💬

What Is String in Windows PowerShell
What is a string in Windows PowerShell? A string is a sequence of characters in Windows PowerShell. If a sting is encoded in ASCII format, each character occupies a single byte. But if a string is encoded in UTF-8 format, a character may occupy multiple bytes. So the number of characters in a string... 2016-10-20, ∼3090🔥, 0💬

String Replacement in Windows PowerShell
How to replace a part of a string in Windows PowerShell? You can use the "-Replace" operation to replace a part of a string in Windows PowerShell. Here is the syntax of the "-Replace" operation: $subject -Replace $pattern,$replacement Regular expression is supported in $pattern. Here are some good e... 2016-10-19, ∼2852🔥, 0💬

All rights in the contents of this web site are reserved by the individual author. fyicenter.com does not guarantee the truthfulness, accuracy, or reliability of any contents.