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Full Discussion: Efficient way to search array in text file by awk
Top Forums Shell Programming and Scripting Efficient way to search array in text file by awk Post 302958734 by Don Cragun on Monday 26th of October 2015 04:14:12 AM
Old 10-26-2015
Hi siramitsharma,
Forum rules prohibit sending private message asking people to respond to your posts.

Note that with the two lines in SPLNO.TXT:
Code:
918542054921|30|1|2
854215595|12|1|2

any of the following lines in MDN.TXT:
Code:
918542054921
91854205492
9185420549
918542054
91854205
9185420
918542
91854
9185
918
91
9
8542054921
854205492
85420549
8542054
854205
85420
8542
854
85
8

would match the 1st line. And any of the following lines in MDN.TXT:
Code:
854215595
85421559
8542155
854215
85421
8542
854
85
8

would match the 2nd line.
So maybe you could pre-build a table of the values that could match entries from the first file and instead of performing lots of matches and comparisons in a loop, you could just test if((mdn in table) || ("91"mdn in table)) instead of the four slower tests you are current using to see if there is a match.

Since every entry in the input has the final two fields with the values 1 and 2, respectively, all we need to know is whether or not there is a match; not what values appear if there is a match. This is important because both entries above match lines in MDN.TXT containing the values:
Code:
8542
854
85
8

You also need to explain why the 2nd field in the 1st line above has the value 30. Since field 1 is 12 characters (918542054921), the longest possible string that can be matched is 12 characters. And, on the 2nd line we have a 1st field (854215595) with length 9 and a second field containing 12. So, I repeat, what use is the 2nd field in SPLNO.TXT other than to give you two more tests to slow down your loop?
 

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LEARN ABOUT MOJAVE

locale::codes::langfam5.18

Locale::Codes::LangFam(3pm)				 Perl Programmers Reference Guide			       Locale::Codes::LangFam(3pm)

NAME

       Locale::Codes::LangFam - standard codes for language extension identification

SYNOPSIS

	  use Locale::Codes::LangFam;

	  $lext = code2langfam('apa');		       # $lext gets 'Apache languages'
	  $code = langfam2code('Apache languages');    # $code gets 'apa'

	  @codes   = all_langfam_codes();
	  @names   = all_langfam_names();

DESCRIPTION

       The "Locale::Codes::LangFam" module provides access to standard codes used for identifying language families, such as those as defined in
       ISO 639-5.

       Most of the routines take an optional additional argument which specifies the code set to use. If not specified, the default ISO 639-5
       language family codes will be used.

SUPPORTED CODE SETS

       There are several different code sets you can use for identifying language families. A code set may be specified using either a name, or a
       constant that is automatically exported by this module.

       For example, the two are equivalent:

	  $lext = code2langfam('apa','alpha');
	  $lext = code2langfam('apa',LOCALE_LANGFAM_ALPHA);

       The codesets currently supported are:

       alpha
	   This is the set of three-letter (lowercase) codes from ISO 639-5 such as 'apa' for Apache languages.

	   This is the default code set.

ROUTINES

       code2langfam ( CODE [,CODESET] )
       langfam2code ( NAME [,CODESET] )
       langfam_code2code ( CODE ,CODESET ,CODESET2 )
       all_langfam_codes ( [CODESET] )
       all_langfam_names ( [CODESET] )
       Locale::Codes::LangFam::rename_langfam  ( CODE ,NEW_NAME [,CODESET] )
       Locale::Codes::LangFam::add_langfam  ( CODE ,NAME [,CODESET] )
       Locale::Codes::LangFam::delete_langfam  ( CODE [,CODESET] )
       Locale::Codes::LangFam::add_langfam_alias  ( NAME ,NEW_NAME )
       Locale::Codes::LangFam::delete_langfam_alias  ( NAME )
       Locale::Codes::LangFam::rename_langfam_code  ( CODE ,NEW_CODE [,CODESET] )
       Locale::Codes::LangFam::add_langfam_code_alias  ( CODE ,NEW_CODE [,CODESET] )
       Locale::Codes::LangFam::delete_langfam_code_alias  ( CODE [,CODESET] )
	   These routines are all documented in the Locale::Codes::API man page.

SEE ALSO

       Locale::Codes
	   The Locale-Codes distribution.

       Locale::Codes::API
	   The list of functions supported by this module.

       http://www.loc.gov/standards/iso639-5/id.php
	   ISO 639-5 .

AUTHOR

       See Locale::Codes for full author history.

       Currently maintained by Sullivan Beck (sbeck@cpan.org).

COPYRIGHT

	  Copyright (c) 2011-2013 Sullivan Beck

       This module is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

perl v5.18.2							    2013-11-04					       Locale::Codes::LangFam(3pm)
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