findword script Post: 302434259

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Homework and Emergencies Homework & Coursework Questions findword script Post 302434259 by methyl on Friday 2nd of July 2010 03:00:18 AM

07-02-2010

Registered User

Something like this: Notice the first grep does not have single quotes because this would stop the variable being expanded.
This script searches for words beginning with the prefix then checks the content character by character looking for a match on all the characters. As soon as it finds 5 matches it stops which is much more efficient than processing the whole file.
I don't know a suitable regular expression to match the content letters (though one may exist) ... but I'm not on your course!

Code:

prefix="$1"
content="$2"
hitcount=0
grep \^"${prefix}" /usr/dict/words | while read line
do
        found=""
        echo "${content}"|fold -1|while read content_char
        do
                found=`echo "${line}"|grep "${content_char}"`
                if [ -z "${found}" ]
                then
                        break
                fi
        done
        if [ ! -z "${found}" ]
        then
                hitcount=$((${hitcount} + 1))
                if [ ${hitcount} -gt 5 ]
                then
                        break
                fi
                echo "${line}"
        fi
done

methyl

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zgrep

ZGREP(1)                                                      General Commands Manual                                                     ZGREP(1)

NAME

       zgrep - search possibly compressed files for a regular expression

SYNOPSIS

       zgrep [ grep_options ] [ -e ] pattern filename...

DESCRIPTION

       Zgrep  invokes  grep  on  compressed  or  gzipped  files.   These  grep  options  will  cause  zgrep  to  terminate  with  an  error  code:
       (-[drRzZ]|--di*|--exc*|--inc*|--rec*|--nu*).  All other options specified are passed directly to grep.  If no file is specified,  then  the
       standard input is decompressed if necessary and fed to grep.  Otherwise the given files are uncompressed if necessary and fed to grep.

       If the GREP environment variable is set, zgrep uses it as the grep program to be invoked.

EXIT CODE

       2 - An option that is not supported was specified.

AUTHOR

       Charles Levert (charles@comm.polymtl.ca)

SEE ALSO

       grep(1), gzexe(1), gzip(1), zdiff(1), zforce(1), zmore(1), znew(1)

                                                                                                                                          ZGREP(1)