Vista - Re: compare-object does not sort on sideindicator

To sort on two, or more, properties and see the next sort, there must be repeated values from the previous property. Your code should work fine, but could be simplified since Sort-Object sorts in Ascending order by default, which is equivalent as the attribute 'Descending=$false'.

sc fileA.txt (gps | % {$_.name} | sort)
sc fileB.txt (gps | % {$_.name} | sort -des)

# the syncWindow used here is not optimun for accurate results,
# this way there will be repeated instances
$testobject = diff (gc fileA.txt) (gc fileB.txt) -s 30

# this is equivalent to your sort statement, inputObject
# in ascending and sideIndicator in descending
$testobject | sort inputobject,
@{e = {$_.sideIndicator}; d = $true}

# this sorts both properties in ascending order
$testobject | sort inputobject, sideindicator


#####################################################################
# output from first sort, note that '=>' is before '<=' for
# each inputObject value
InputObject SideIndicator
----------- -------------
AluSchedulerSvc =>
AluSchedulerSvc <=
audiodg =>
audiodg <=
AutoLaunchWLASU =>
AutoLaunchWLASU <=
.
.
.

# output from second sort, here '<=' is before '=>' for each
# inputObject value
InputObject SideIndicator
----------- -------------
AluSchedulerSvc <=
AluSchedulerSvc =>
audiodg <=
audiodg =>
AutoLaunchWLASU <=
AutoLaunchWLASU =>
.
.
.

--
Kiron

Hi Tao Ma,
No mistake, Compare-Object compares one set against the other, if no match is found it 're-syncs' the order of one set and compares again. By default the -SyncWindow is set to 5. Since files 1.txt and 2.txt contain 3 lines each, below the SyncWindow, it matches all lines and nothing outputs.

If you modify 2.txt content to:
1
2
2
3

Compare-Object finds the extra line.

PS: Your English is great!

--
Kiron