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Annotation of 42BSD/usr.lib/learn/editor/L54.1b, revision 1.1.1.1

1.1       root        1: #print
                      2: The fact that the system remembers the last regular expression
                      3: it had is particularly useful when the regular expression is
                      4: complex.  Suppose, for example, you know that the
                      5: words "first" and "second" appear on the same line and you wish
                      6: to delete them and everything between them.  You could write
                      7:   /first.*second/s/first.*second//p
                      8: but isn't it easier to do
                      9:   /first.*second/s///p
                     10: Edit the file "passage"; the words "twentieth" and "impending" appear
                     11: on the same line.  Replace them and everything between
                     12: them by the word "impending" (i.e. delete from "twentieth"
                     13: up to but not including "impending").  One command, if you can.
                     14: Then rewrite the file and type ready.
                     15: #create Ref
                     16:    America's rise to world power is a consequence of the nation's
                     17: geographic position, natural resources, and dynamic energy.  For
                     18: the first century and more of national history, however, continental
                     19: expansion and internal developments largely absorbed the energies
                     20: of the American people.  Every dictate of public interest emphasized
                     21: the importance of avoiding all entanglements that might involve the
                     22: young republic in foreign rivalries and foreign wars.  Only with the
                     23: impending shifts
                     24: in the European balance of power, and the growth of American economic
                     25: and industrial strength create a situation that made impossible a
                     26: continued aloofness from international affairs.
                     27: #create passage
                     28:    America's rise to world power is a consequence of the nation's
                     29: geographic position, natural resources, and dynamic energy.  For
                     30: the first century and more of national history, however, continental
                     31: expansion and internal developments largely absorbed the energies
                     32: of the American people.  Every dictate of public interest emphasized
                     33: the importance of avoiding all entanglements that might involve the
                     34: young republic in foreign rivalries and foreign wars.  Only with the
                     35: twentieth century did a rapidly contracting world, impending shifts
                     36: in the European balance of power, and the growth of American economic
                     37: and industrial strength create a situation that made impossible a
                     38: continued aloofness from international affairs.
                     39: #user
                     40: #cmp passage Ref
                     41: #log
                     42: #next
                     43: 55.1a 10

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