Compare-Object 
ForEach-Object	
Group-Object




NAME
    Compare-Object

SYNOPSIS
    Compares two sets of objects.


SYNTAX
    Compare-Object [-ReferenceObject]  [-DifferenceObject] 
     [-CaseSensitive] [-Culture ] [-ExcludeDifferent] [-IncludeEqual] [-Pas
    sThru] [-Property ] [-SyncWindow ] []


DESCRIPTION
    The Compare-Object cmdlet compares two sets of objects. One set of objects is t
    he Reference set, and the other set is the Difference set.

    The result of the comparison indicates whether a property value appeared only i
    n the object from the Reference set (indicated by the <= symbol), only in the o
    bject from the Difference set (indicated by the => symbol) or, if the IncludeEq
    ual parameter is specified, in both objects (indicated by the == symbol).


RELATED LINKS
    Online version: http://go.microsoft.com/fwlink/?LinkID=113286
    Group-Object
    Measure-Object
    Sort-Object
    ForEach-Object
    New-Object
    Select-Object
    Tee-Object
    Where-Object

REMARKS
    To see the examples, type: "get-help Compare-Object -examples".
    For more information, type: "get-help Compare-Object -detailed".
    For technical information, type: "get-help Compare-Object -full".


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NAME
    ForEach-Object

SYNOPSIS
    Performs an operation against each of a set of input objects.


SYNTAX
    ForEach-Object [-Process]  [-Begin ] [-End ] [-InputObject ] []


DESCRIPTION
    The ForEach-Object cmdlet performs an operation on each of a set of input objec
    ts. The input objects can be piped to the cmdlet or specified by using the Inpu
    tObject parameter.

    The operation to perform is described within a script block that is provided to
     the cmdlet as the value of the Process parameter. The script block can contain
     any Windows PowerShell script.

    Within the script block, the current input object is represented by the $_ vari
    able.
    In addition to using the script block that describes the operations to be carri
    ed out on each input object, you can provide two additional script blocks. One,
     specified as the value of the Begin parameter, runs before the first input obj
    ect is processed. The other, specified as the value of the End parameter, runs
    after the last input object is processed.

    The results of the evaluation of all the script blocks, including the ones spec
    ified with Begin and End, are passed down the pipeline.


RELATED LINKS
    Online version: http://go.microsoft.com/fwlink/?LinkID=113300

REMARKS
    To see the examples, type: "get-help ForEach-Object -examples".
    For more information, type: "get-help ForEach-Object -detailed".
    For technical information, type: "get-help ForEach-Object -full".

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NAME
    Group-Object

SYNOPSIS
    Groups objects that contain the same value for specified properties.


SYNTAX
    Group-Object [-AsHashTable] [-AsString] [[-Property] ] [-CaseSensitiv
    e] [-Culture ] [-InputObject ] [-NoElement] []


DESCRIPTION
    The Group-Object cmdlet displays objects in groups based on the value of a spec
    ified property. Group-Object returns a table with one row for each property val
    ue and a column that displays the number of items with that value.

    If you specify more than one property, Group-Object first groups them by the va
    lues of the first property, and then, within each property group, it groups by
    the value of the next property.


RELATED LINKS
    Online version: http://go.microsoft.com/fwlink/?LinkID=113338

REMARKS
    To see the examples, type: "get-help Group-Object -examples".
    For more information, type: "get-help Group-Object -detailed".
    For technical information, type: "get-help Group-Object -full".