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Annotation of 43BSDTahoe/usr.lib/learn/editor/L35.2e, revision 1.1.1.1

1.1       root        1: #print
                      2: A very powerful construction is ".*",
                      3: which matches any character (remember '.')
                      4: repeated any number of times.    For example
                      5: 
                      6: s/a.*b/.../
                      7: 
                      8: replaces anything of the forms
                      9: 
                     10: axyzb,  aaaaaab,   a1234b,  abbbb
                     11: 
                     12: since it requires just an 'a' and a 'b'
                     13: at the ends of the string, with
                     14: anything at all in between.
                     15: Or, to throw away everything
                     16: on a line after the word "stop", you could try
                     17: 
                     18: s/stop.*/stop/
                     19: 
                     20: In this directory is a file "sentence".
                     21: Delete everything after
                     22: the word "last" on the second line of the file.
                     23: #create Ref
                     24: This file has a sentence in which
                     25: this is the last
                     26: #create sentence
                     27: This file has a sentence in which
                     28: this is the last word which should be left.
                     29: #user
                     30: #cmp sentence Ref
                     31: #next
                     32: 36.1a 10
                     33: 36.2a 5

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