PowerShell syntax and powershell syntax

PowerShell syntax and powershell syntax
Note

• # Statements

• <# Statement #>

Variable

• Naming rules $ as the prefix

• Use letters, numbers, and underscores

• View all variables Get-ChildItem variable: or Get-Varialbe

• Get the Scope Variable Get-Variable-Scope [Local | Global]

• Instantiate an Object $ dt = New-Object DateTime

Array

• Define $ arr = 1, 2, 4

• $ Arr = 1 .. 4

• Values: $ arr [1, 3], $ arr [1, 3 + 2], and $ arr [1 .. 3 + 2]

• Assign $ a, $ B = 1, 2, $ B, $ a = $ a, $ B

• Array merging using operators and operators

• Comparison operators can filter array content

Hashtable

• Integration of Hashtable in PowerShell

• Definition method @ {a = 1; B = "t "}

• Merge operator @ {a = 1} + @ {B = 2}

• If the value is $ ht = @ {a = 1}, use $ ht ["a"] $ ht..

• Other operation methods are consistent with CRL objects

String/other objects

• Multi-line string @"...."@

• Character escape characters such as "'n"

• Copy string "a" * 2

• Convert a string into an XML object [xml] "<a> 12 </a>"

Process Control

• If () {} elseif {} else {}

• Switch () {value1 {...; Break} value2 {....; Break }}

• Foreach ($ xxx in $ yyy ){}

• For ($ I = 0; $ I-le 100; $ I ++ ){}

• While (){}

• Do {} while ()

• Do {} ()

Method

Function methodName {

Param ($ size) # Parameter

# Executed statements
}

Or

Function methodName ($ p ){

# Executed statements

}

CLR/DLR object

• Static member access [DateTime]: Now

• Instantiate $ dt = new-object DateTime (, 9 );

• Instance Member access $ dt. AddDays (100)

• Use of Generic types $ l = new-object System. Collections. Generic. List [int]

• Get all members of an object Get-Member-InputObject $ l