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Top Forums Shell Programming and Scripting Speeding up shell script with grep Post 302994609 by Don Cragun on Saturday 25th of March 2017 06:07:42 AM
Old 03-25-2017
In addition to what bakunin suggested, you might also consider the following to more closely match the output produced by your current script...

Making the wild assumptions that:
  1. master.csv is a character separated values file with comma as the character separating fields, and
  2. the field containing the phone number in master.csv is the 1st field
how long does the following script take:
Code:
awk -v fn=1 -F',' '
FNR == NR {
	p[$fn]
	next
}
{	print "checking master for phone number", $1
	if($1 in p) {
		print $1, "already exists in master file "
		print > "unusable_numbers"
	} else {
		print $1, "looks good we can use this saving to usable_numbers"
		print > "useable_numbers"
	}
}' master.csv new

to do the same job?

If the field number in master.csv is not the 1st field, change the value assigned to the fn variable from 1 to the field number of the field containing the phone number.

If the field separators in master.csv are not commas, change the character in the -F option-argument to the desired character.
 

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Text::CSV::Encoded::Coder::EncodeGuess(3pm)		User Contributed Perl Documentation	       Text::CSV::Encoded::Coder::EncodeGuess(3pm)

NAME
Text::CSV::Encoded::Coder::EncodeGuess - Text::CSV::Encoded coder class using Encode::Guess SYNOPSIS
use Text::CSV::Encoded coder_class => 'Text::CSV::Encoded::Coder::EncodeGuess'; use Spreadsheet::ParseExcel; my $csv = Text::CSV::Encoded->new(); $csv->encoding( ['ucs2', 'ascii'] ); # guessing ucs2 or ascii? $csv->encoding_to_combine('shiftjis'); my $excel = Spreadsheet::ParseExcel::Workbook->Parse( $file ); my $sheet = $excel->{Worksheet}->[0]; for my $row ( $sheet->{MinRow} .. $sheet->{MaxRow} ) { my @fields; for my $col ( $sheet->{MinCol} .. $sheet->{MaxCol} ) { my $cell = $sheet->{Cells}[$row][$col]; push @fields, $cell->{Val}; } $csv->combine( @fields ) or die; print $csv->string, " "; } DESCRIPTION
This module is inherited from Text::CSV::Encoded::Coder::Encode. USE
Except for 2 attributes, same as Text::CSV::Encoded::Coder::Encode. encoding_in $csv = $csv->encoding_in( $encoding_list_ref ); The accessor to an encoding for pre-parsing CSV strings. If no encoding is given, returns current $encoding, otherwise the object itself. $encoding_list_ref = $csv->encoding_in() When you pass a list reference, it might guess the encoding from the given list. $csv->encoding_in( ['shiftjis', 'euc-jp', 'iso-20022-jp'] ); If it cannot guess the encoding, the first encoding of the list is used. encoding $csv = $csv->encoding( $encoding_list_ref ); $encoding_list_ref = $csv->encoding(); You can pass a list reference to this attribute only: * For list data consumed by combine(). * For list reference returned by getline(). In other word, in "combine" and "print", it might guess an encoding for the passing list data. If it cannot guess the encoding, the first encoding of the list is used. SEE ALSO
Encode, Encode::Guess AUTHOR
Makamaka Hannyaharamitu, <makamaka[at]cpan.org> COPYRIGHT AND LICENSE
Copyright 2008-2010 by Makamaka Hannyaharamitu This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself. perl v5.14.2 2010-04-26 Text::CSV::Encoded::Coder::EncodeGuess(3pm)
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