Challenge: Changing content of txt-file according to another txt-file with PowerShell

hey,

i got task college of mine , first thing thought monkey it. in other words; let's script it.

we renaming bunch of ad-groups because migrate them domain, , can't have duplicates.

this got work with:

i got 1 txt-file (file1) bunch of ad-groupnames, renamed. example:

g_lolgroup
g_exgroup
g_adgroup
g_hagroup

i got second txt-file (file2) bunch of ad-groupnames, , fun happens. example:

g_lolgroup
g_exgroup
g_adgroup
g_nogroup
g_hagroup

what need this..: foreachmatch between file1 , file2, add ¤groupname+_1 after matching group .

file2 end looking this:

g_lolgroup¤g_lolgroup_1
g_exgroup¤g_exgroup_1
g_adgroup¤g_adgroup_1
g_nogroup
g_hagroup¤g_hagroup_1

appreciate can get, because can't wrap head around this.

get-content file1.txt,file2.txt | group | foreach { 	$gr = $_.name 	if($_.count -eq 1) 	{ 		$gr 	} 	else { 		$gr +"¤" + ((1..$_.count | {$_- 1 -ne 0} | foreach {$gr+"_"+($_ - 1)}) -join ",") 	} }

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