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Searching for misspelled words and the line number

Posted on 2001-07-26
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Last Modified: 2012-06-21
I'm trying to write a script that searches for specific misspelled words.  For example, to find any misspelling for the word ISSN at the beginning of a line, I started doing this:


#! /usr/bin/perl -n

/^I(S|[^S])[^S]N/ && print;
/^I(S|[^S])[^S]N/ && print;
/^I[^S]([S]|[^S])[^N]/ && print;

The first line looks for possible misspelling in the 2nd & 3rd letters, the second line looks for possible misspelling in the 2nd letter, etc., etc.

This is a nightmare and I have about 70 such key words; is there an easier way?

If the line number that the error appears can be printed also would be great too.




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Question by:hadrons
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6 Comments
 
LVL 51

Expert Comment

by:ahoffmann
ID: 6325874
write the correct words in a array, like
   @ok=('ISSN', 'etc.');
then match the first word against the array:
   if (!grep(/^$firstword$/,@ok) ) { print "missmatch\n"; }
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LVL 84

Accepted Solution

by:
ozo earned 200 total points
ID: 6327271
Faster to write the correct words in a hash, like
  @ok{'ISSN', 'etc.'}=();
then
  if( !exists $ok{$firstword} ){ print "missmatch\n"; }

Or,
   use String::Approx;
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Author Comment

by:hadrons
ID: 6329736
You guys are going to think I'm so clueless, but I wasn't able to get the desired results.  I'm sure it me not setting this up corrected, so I'll go thru it blow by blow.

I used a file with these lines:

ISSN: right1
ISBN: wrong1
NAME: right1
NAEM: wrong1

created the command script:

#! /usr/bin/perl
@ok=('ISSN', 'NAME');
if (!grep(/^$firstword$/,@ok) ) { print "missmatch\n"; }

it printed just missmatch; and when I edited the file with just the correct names, it did the same thing.


Afterwards, I looked at this line: if (!grep(/^$firstword$/,@ok) ) { print "missmatch\n"; }

and changed it to: if (!grep(/^ISSN/,@ok) ) { print "missmatch\n"; }

And it compiled, but nothing occurred.  I did the same thing to ozo code and the results matched (so this is why I think the problem is with the way I'm setting it up)





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LVL 8

Expert Comment

by:bebonham
ID: 6332493
I don't know grep, but here is the hash version
###this simulates readin from file###
$arr[0]="ISSN: right1";
$arr[1]="ISBN: wrong1";
$arr[2]="NAME: right1";
$arr[3]="NAEM: wrong1";
###if you want to readin from file you can use
###@arr=<FILE>;

@ok{'ISSN', 'NAME'}=();
foreach $firstword(@arr)
{
$firstword=~s/^([^:]+):.*/\1/;
if(!exists $ok{$firstword} ){ print  $firstword . " missmatch\n"; }
}
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Expert Comment

by:bebonham
ID: 6332495
I was just fleshing out ozo's solution, he already provided all the code.
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Author Comment

by:hadrons
ID: 6391138
sorry for the long delay; there was a medical emergency and I was away from everything.  It was String::Approx; that did the trick for me, it was new to me to use modules, but I liked the results.

And I was able to use parts of the code from all of you to improve other pieces of code I was using.
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