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Annotation of 43BSD/usr.lib/learn/editor/L13.2a, revision 1.1

1.1     ! root        1: #print
        !             2: Remember that "$" is the last line in
        !             3: the current file.  Suppose you want to
        !             4: know how long the file is, i.e. what the
        !             5: number of the last line is.  The command
        !             6:   $=
        !             7: will tell you that.  So you can find the length
        !             8: of the file "data" by saying in the editor
        !             9:   $=
        !            10:   wq
        !            11: Try that; then check by listing the file
        !            12: with "cat" to see how long it is.  Then type
        !            13: "ready".
        !            14: #create data
        !            15: This is the file
        !            16: which you should
        !            17: find the number
        !            18: of lines in by
        !            19: typing "$=" in
        !            20: the editor and see
        !            21: that it has exactly
        !            22: nine lines in it
        !            23: when printed.
        !            24: #copyout
        !            25: #pipe
        !            26: ex +'set prompt noopt open' data
        !            27: #user
        !            28: #unpipe
        !            29: #uncopyout
        !            30: grep ':9' .ocopy >/dev/null
        !            31: #log
        !            32: #next
        !            33: 13.2b 5

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