Sorting a hash table
There is a really good PowerShell script for working with indexed files - scans or photos and renumbering to cope with missing numbers available from http://www.tellingmachine.com/post/2008/07/Renaming-a-series-of-indexed-files-with-Powershell.aspx
One point at the end of the post is about sorting hash tables. This is not intuitive as piping the hash table into sort does not work. You need to use the GetEnumerator() before trying to sort like this
PS> $a = @{}
PS> $a[[int]1] = "dir scan0001.txt"
PS> $a[[int]11] = "dir scan0011.txt"
PS> $a[[int]3] = "dir scan0003.txt"
PS> $a
Name Value
---- -----
3 dir scan0003.txt
1 dir scan0001.txt
11 dir scan0011.txt
PS> $a.getEnumerator() | Sort Key -Descending
Name Value
---- -----
11 dir scan0011.txt
3 dir scan0003.txt
1 dir scan0001.txt
PS> $a.getEnumerator() | Sort Name -Descending
Name Value
---- -----
11 dir scan0011.txt
3 dir scan0003.txt
1 dir scan0001.txt
Create a hash table as shown. Use the getEnumerator() method and pipe into sort. Sorted!
Read the complete post at http://richardsiddaway.spaces.live.com/Blog/cns!43CFA46A74CF3E96!1551.entry