What is the "Where-Object" cmdlet in Windows PowerShell?

"Where-Object" cmdlet in Windows PowerShell takes an input of object list and generate an output object list by filtering out objects with specific criteria.

Example 1: the following command uses "where-object" to filter out objects with a condition on a property:

PS C:\fyicenter> Get-Process | Where-Object CPU -gt 1000

Handles  NPM(K)    PM(K)      WS(K) VM(M)   CPU(s)     Id ProcessName
-------  ------    -----      ----- -----   ------     -- -----------
    262      13   120432      36732   291 8,659.91    916 dwm
   3132      83   145168      67676   449 7,234.55   3344 explorer
   1395      73   682352     267368  1538 9,249.25   4896 firefox

Example 2: the following command uses "where-object" to filter out objects with multiple conditions on properties:

PS C:\fyicenter> Get-Process 
   | Where-Object {($_.WS -gt (10000*1024)) -and ($_.CPU -gt 10)}

Handles  NPM(K)    PM(K)      WS(K) VM(M)   CPU(s)     Id ProcessName
-------  ------    -----      ----- -----   ------     -- -----------
    262      13   120432      36756   291 8,665.65    916 dwm
   3129      83   145152      67944   449 7,235.44   3344 explorer
   1397      73   688716     279216  1537 9,254.35   4896 firefox
    869      21    64848      25800   266    50.51   3280 powershell
    692      23   140136      26288   335    31.68   8528 powershell

⇒Introduction of Windows PowerShell Cmdlet

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