Mastering Windows PowerShell Scripting - Third Edition

The Measure-Object command

When used without any parameters, Measure-Object will return a value for Count, which is the number of items passed in using the pipeline, for example:

PS> 1, 5, 9, 79 | Measure-ObjectCount     : 4Average   :Sum       :Maximum   :Minimum   :Property  :

Each of the remaining properties is empty, unless requested using their respective parameters. For example, -Sum may be requested:

PS> 1, 5, 9, 79 | Measure-Object -SumCount      : 4Average    :Sum        : 94Maximum    :Minimum    :Property   :

Adding the remaining parameters will fill in the rest of the fields (except Property):

PS> 1, 5, 9, 79 | Measure-Object -Average -Maximum -Minimum -SumCount       : 4Average     : 23.5Sum         : 94Maximum     : 79Minimum     : 1Property    :

The value for Property is filled in when Measure-Object ...