SOC 103M Winter 2002 Midterm Solutions                     
                                                                               
                                Dana Dahlstrom                                 

                                  2002.02.13                                   

 1. [44 points]
     a. [4 points] :%s/utta/utter/g
     b. [6 points] :%s/Calcutter/Calcutta/g or /Calcutter followed by
        cwCalcutta or any other description of a working solution
     c. [2 points] 3G or :3 goes to line 3
     d. [2 points] 11| goes to column 11 in the current line
     e. [2 points] 2h4l or hhllll
     f. [2 points] $ goes to the end of the line
     g. [2 points] 4G or :4 (or j from line 3) goes to line 4. ^ goes to the
        first non-blank character. 0 goes to the first character even if blank.
        Also, 4G and :4 already go to the first non-blank character (j
        doesn't).
     h. [2 points] 2k or kk
     i. [2 points] 6G or :6 goes to line 6; dd deletes the line
     j. [2 points] p puts the text after the cursor
     k. [2 points] 6G or :6 goes to line 6; "add deletes the line into register
        a
     l. [2 points] "aP puts the text from register a before the cursor
     m. [4 points] 1G or :1 goes to line 1; A appends at the end of the line
     n. [4 points] 1G or :1 goes to line 1; I inserts before the first
        non-blank character on the line.
     o. [4 points] Ctrl-D scrolls down half a screen; Ctrl-U scrolls up half a
        screen; H goes to the first non-blank character of the line at the top
        of the screen; L goes to the first non-blank character of the line at
        the bottom of the screen.
     p. [2 points] :wq writes the current file and quits
 2. [44 points]
     a. [6 points] grep "t[eoia]n" oink.txt
     b. [14 points]
        grep "[A-Z][a-h2-6, ][357]"
        grep -v "[A-Z][a-h2-6, ][357]"
        grep "^[A-Z][a-h2-6, ][357]"
        grep "[A-Z][a-h2-6, ][357]$"
     c. [4 points] grep "^$"
     d. [4 points] sort -k1,1 clean_limerick.txt
     e. [8 points]
        ls
        ls > listoffiles.txt
        ls | wc -l
     f. [8 points]
        cd ..
        cd - or cd so103class
        mkdir schlemiel
 3. [40 points]
     a. [2 points] { print $0 } or just { print }
     b. [6 points] { if ($2 = 2) print =
     c. [12 points] There are slicker ways, but this was shown in class:
         
        {
          sex = $2
          if (sex == 1) sexmales = sexmales + 1
          if (sex == 2) sexfemales = sexfemales + 1
        }
        END {
          print sexmales, "males"
          print sexfemales, "females"
        }
     d. [12 points]
       
        NR
            Number of the current record.
        NF
            Number of fields in the current record.
        $NF
            The last field of the current record.
        $(NF-1)
            The next-to-last field of the current record.
        $2
            The second field in the current record.
        $0
            The (entire) current record.
       
     e. [8 points]
         
        BEGIN {
          for ( x = 3; x <= 10; x = x + 1 ) {
            print x
          }
        }