微軟帝國 : [轉貼]Tony's 之以前的 Windows PowerShell 筆記

 -eq             Equal
 -ne             Not equal
 -ge             Greater than or equal
 -gt             Greater than
 -lt             Less than
 -le             Less than or equal
 -like           Wildcard comparison
 -notlike        Wildcard comparison
 -match          Regular expression comparison
 -notmatch       Regular expression comparison
 -replace        Replace operator
 -contains       Containment operator
 -notcontains    Containment operator
 -shl            Shift bits left (PowerShell 3.0)
 -shr            Shift bits right – preserves sign for signed values.(PowerShell 3.0)
 -in             Like –contains, but with the operands reversed.(PowerShell 3.0)
 -notin          Like –notcontains, but with the operands reversed.(PowerShell 3.0)

 -is     Is of a type
 -isnot  Is not of a type
 -as     As a type, no error if conversion fails

 -and    Logical And
 -or     Logical Or
 -not    logical not
  !      logical not

 -band   Bitwise and
 -bor    Bitwise or

 "format_string" -f Object1, Object2,...

$demo = $null
if (-Not ($demo)) { write "Zero, null or Empty"}
if (!($demo)) { write "Zero, null or Empty"}

$myVar -is "String"
$myVar -eq 123
$myVar -ceq $myVar2
"abcdef" -like "abc*"
"abcdef" -replace "dEf","xyz"
$myVar1 -is "String" -and $myVar2 -is "Int"
"{2:N}" -f 24.4567
(1 -eq 1) -and -not (2 -gt 2)

$mycmd = ps | select id,ProcessName
foreach ($proc in $mycmd) {"{0,-8}{1,-20}" -f $proc.id, $proc.ProcessName}