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Full Discussion: Unix Spell Checker Assignment
Homework and Emergencies Homework & Coursework Questions Unix Spell Checker Assignment Post 302468468 by bravens52 on Wednesday 3rd of November 2010 05:47:59 PM
Old 11-03-2010
Unix Spell Checker Assignment
hello, im a new member to the forum and im doing a assignment for unix command and we have to make a spell checker and im a little confused about the directions .. ill post them below and continue..

Northern Illinois University
CSCI 330-Unix Command

Write a shell script that implements a simple spell checker. The general format for invocation is:
niuspell file
where "niuspell" is the name of the executable file that contains your shell script, and "file" refers to the file to be checked word-by-word for spelling. Your are encouraged to take advantage of the "ispell -l" command. It produces a list of misspelled words from standard input.
Specification:

When "niuspell" is invoked from the command line it reads "file" and checks it for spelling of the words it contains. For each word that is found to be incorrect, the invoker is asked for either:
  • to insist on the spelling of the word.
  • to provide a replacement spelling
If the invoker insists on the spelling of the word, then niuspell will remember it. niuspell remembers words in the file ".niuspelled" in the invoker's home directory. Any further invocation of niuspell by the same invoker will consider the word to be correct. Otherwise, the invoker is prompted for a replacement spelling. As output, niuspell produces a 2-column-ed list of words, the left column lists incorrectly spelled words, the right column lists their replacement as given by the invoker. The list is produced after the invoker has answered to all incorrectly spelled words.
Here is an example of an invocation of the niuspell script with a testfile:



ok so i made 2 separate files one called niuspell and one called testfile. My test file I have is a random paragraph that has a few misspelled words. My niuspell file i am confused on how i set it up. I started with my #! /bin/bash and im stuck. Could anyone give me a hint on how i move forward.

---------- Post updated 11-03-10 at 04:47 PM ---------- Previous update was 11-02-10 at 07:51 PM ----------

can anyone please help

The output my teacher gave us:

% ls
testfile niuspell
% cat testfile
I was going about my business quite nicely
when I was acosted by the mail man
whio insisted that my name is Raimund Ege
but I did not believe him
% ./niuspell testfile

'acosted' is mispelled. Press "Enter" to keep
this spelling, or type a correction here: accosted

'whio' is mispelled. Press "Enter" to keep
this spelling, or type a correction here: who

'Raimund' is mispelled. Press "Enter" to keep
this spelling, or type a correction here:

'Ege' is mispelled. Press "Enter" to keep
this spelling, or type a correction here:

MISPELLED: CORRECTIONS:

acosted accosted
whio who

% ./niuspell testfile

'acosted' is mispelled. Press "Enter" to keep
this spelling, or type a correction here: accosted

'whio' is mispelled. Press "Enter" to keep
this spelling, or type a correction here: who

MISPELLED: CORRECTIONS:

acosted accosted
whio who

% cat ~/.niuspelled
Raimund
Ege
% cat testfile
I was going about my business quite nicely
when I was acosted by the mail man
whio insisted that my name is Raimund Ege
but I did not believe him
 

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LEARN ABOUT REDHAT

xml::dom::valparser

XML::DOM::ValParser(3)					User Contributed Perl Documentation				    XML::DOM::ValParser(3)

NAME

       XML::DOM::ValParser - an XML::DOM::Parser that validates at parse time

SYNOPSIS

	use XML::DOM::ValParser;

	my %expat_options = (KeepCDATA => 1,
			     Handlers => [ Unparsed => &my_Unparsed_handler ]);
	my $parser = new XML::DOM::ValParser (%expat_options);

	eval {
	    local $XML::Checker::FAIL = &my_fail;
	    my $doc = $parser->parsefile ("fail.xml");
	    ... XML::DOM::Document was created sucessfully ...
	};
	if ($@) {
	    # Either XML::Parser (expat) threw an exception or my_fail() died.
	    ... your error handling code here ...
	    # Note that the XML::DOM::Document is automatically disposed off and
	    # will be garbage collected
	}

	# Throws an exception (with die) when an error is encountered, this
	# will stop the parsing process.
	# Don't die if a warning or info message is encountered, just print a message.
	sub my_fail {
	    my $code = shift;
	    die XML::Checker::error_string ($code, @_) if $code < 200;
	    XML::Checker::print_error ($code, @_);
	}

DESCRIPTION

       Use XML::DOM::ValParser wherever you would use XML::DOM::Parser and your XML will be checked using XML::Checker at parse time.

       See XML::DOM for details on XML::DOM::Parser options.  See XML::Checker for details on setting the fail handler (my_fail.)

       The following handlers are currently supported, just like XML::DOM::Parser: Init, Final, Char, Start, End, Default, Doctype, CdataStart,
       CdataEnd, XMLDecl, Entity, Notation, Proc, Default, Comment, Attlist, Element, Unparsed.

XML
::DOM::ValParser
       XML::DOM::ValParser extends from XML::Checker::Parser. It creates an XML::Checker object and routes all event handlers through the checker,
       before processing the events to create the XML::DOM::Document.

       Just like XML::Checker::Parser, the checker object can be retrieved with the getChecker() method and can be reused later on (provided that
       the DOCTYPE section of the XML::DOM::Document did not change in the mean time.)

       You can control which errors are fatal (and therefore should stop creation of the XML::DOM::Document) by filtering the appropriate error
       codes in the global $XML::Checker::FAIL handler (see "ERROR_HANDLING" in XML::Checker) and calling die or croak appropriately.

       Just like XML::Checker::Parser, XML::DOM::ValParser supports the SkipExternalDTD and SkipInsignifWS options. See XML::Checker::Parser for
       details.

AUTHOR

       Send bug reports, hints, tips, suggestions to Enno Derksen at <enno@att.com>.

SEE ALSO

       XML::DOM, XML::Checker ("SEE_ALSO" in XML::Checker)

perl v5.8.0							    2000-01-31						    XML::DOM::ValParser(3)
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