Q0
        Set up
                : svn export http://unbox.org/wisp/var/timm/10/310/src/st/3/a
                : svn add a
                : svn commit -m "3a ready to go"
                :
For each of the following questions, add lines like this to "run"
        printf "\n===== 3/a/q1 ========================\n\n"
        cat myCodeThatAnswersThisQuestion.st
        execute
                : where "execute" is the "test" command shown below.

Q1
        Write
                : Write a Smallk String method that assumes the receiver is a
                : filename.
                : Write out that file, line by line. Predix each line with
                : its line number.
        Hints: if will begine like this
                Create a file String.st
                Start typing
                        ! String methods !
                        asFileWithLineNumbers
                           "insert your code here"
                        !!
                Edut Z.st
                        'testfilename.dat' asFileWithLineNumbers !
                See if it works
                        bash run
        Test
                : 'testfilename.dat' asFileWithLineNumbers
        Hint
                : 0lib.st, fileLinesDo:

Q2
        Write
                : Write  Smalltalk   code that  that reads every line of input into an array.
                : Then print that array in reverse order.
        Test
                : 'testfilename.dat' asFileLines reverse printNumbered !
        Hint
                : Create files String.st and SeqCollect.st.
                : "asFileLines" is one of your new String method that returns an OrderedCollection of all the lines
                : reverse is a Smalltalk builit
                : "printNumbers"  is your new SequenceableCollection method that prints the reciever,
                :     with a item number at the front.

Q3
        Write
                : Write an Smalltalk program that prints out (one per line) all the
                : left-hand-side "variables" (i.e.  : non-terminals").
                : Test that on english.rules
        Test
                : |g| g:= Grammar new. g file: 'english.rules'. g lhs. !
        Hint
                : Of all the above code, only "lhs" is new.

Q4
        Write
                : Write a Smalltalk program that prints out (one per line) all the
                : right-hand-side "variables" (i.e.  : non-terminals").
                : Test that on english.rules
        Test
                : |g| g:= Grammar new. g file: 'english.rules'. g rhs. !
        Hint
                : 1) Inside Grammar class
                :      rules associationsDo: [:pair | pair value do: [:rhsSymbol| ...]].
                : 2) This code requires "g lhs" since to decide if a rhs symbol needs
                :    printing, you must check that it does not appear on the lhs.