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Annotation of 43BSD/usr.lib/learn/editor/L10.1b, revision 1.1.1.1

1.1       root        1: #print
                      2: You can of course combine the various sorts
                      3: of line addresses we have been using.
                      4: Suppose the last line is line 6; then $ is
                      5: line 6, and $-1 is line 5.  Thus $-1 is the
                      6: next to last line, and 
                      7:   1,$-1p
                      8: prints all but the last line of a file.  Again,
                      9: I'll put you in the editor: print the last three lines
                     10: of the file.  End with the usual w, q, and ready.
                     11: #create Ref
                     12: : Gil Hodges
                     13:  Yogi Berra
                     14:  Roy McMillan
                     15: :"file" 6 lines, 89 characters
                     16: #create file
                     17: New York Mets Managers
                     18:  Casey Stengel
                     19:  Wes Westrum
                     20:  Gil Hodges
                     21:  Yogi Berra
                     22:  Roy McMillan
                     23: #copyout
                     24: #pipe
                     25: ex +'set prompt noopt open' file
                     26: #user
                     27: #unpipe
                     28: #uncopyout
                     29: tail -4 .ocopy >X1
                     30: #cmp X1 Ref 4
                     31: #fail
                     32: I hope you realized the addresses had to be
                     33:   $-2,$p
                     34: to get the last three lines.
                     35: #log
                     36: #next
                     37: 11.1a 10
                     38: 11.2a 5

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