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Top Forums Shell Programming and Scripting Sed: would like to return an error for empty string Post 303045788 by RudiC on Monday 13th of April 2020 09:17:42 AM
Old 04-13-2020
Try testing for "start-of-line nothing end-of-line":

Code:
echo "" | sed -n -r '/[0-9]{3}/{q100}; /^$/{q200}'; echo $?
200

And, wouldn't it make sense to have different codes for different errors?
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Locale::Codes::Currency(3pm)				 Perl Programmers Reference Guide			      Locale::Codes::Currency(3pm)

NAME
Locale::Codes::Currency - standard codes for currency identification SYNOPSIS
use Locale::Codes::Currency; $curr = code2currency('usd'); # $curr gets 'US Dollar' $code = currency2code('Euro'); # $code gets 'eur' @codes = all_currency_codes(); @names = all_currency_names(); DESCRIPTION
The "Locale::Codes::Currency" module provides access to standard codes used for identifying currencies and funds, such as those defined in ISO 4217. Most of the routines take an optional additional argument which specifies the code set to use. If not specified, the default ISO 4217 three-letter codes will be used. SUPPORTED CODE SETS
There are several different code sets you can use for identifying currencies. 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: $curr = code2currency('usd','alpha'); $curr = code2currency('usd',LOCALE_CURR_ALPHA); The codesets currently supported are: alpha, LOCALE_CURR_ALPHA This is a set of three-letter (uppercase) codes from ISO 4217 such as EUR for Euro. Two of the codes specified by the standard (XTS which is reserved for testing purposes and XXX which is for transactions where no currency is involved) are omitted. This is the default code set. num, LOCALE_CURR_NUMERIC This is the set of three-digit numeric codes from ISO 4217. ROUTINES
code2currency ( CODE [,CODESET] ) currency2code ( NAME [,CODESET] ) currency_code2code ( CODE ,CODESET ,CODESET2 ) all_currency_codes ( [CODESET] ) all_currency_names ( [CODESET] ) Locale::Codes::Currency::rename_currency ( CODE ,NEW_NAME [,CODESET] ) Locale::Codes::Currency::add_currency ( CODE ,NAME [,CODESET] ) Locale::Codes::Currency::delete_currency ( CODE [,CODESET] ) Locale::Codes::Currency::add_currency_alias ( NAME ,NEW_NAME ) Locale::Codes::Currency::delete_currency_alias ( NAME ) Locale::Codes::Currency::rename_currency_code ( CODE ,NEW_CODE [,CODESET] ) Locale::Codes::Currency::add_currency_code_alias ( CODE ,NEW_CODE [,CODESET] ) Locale::Codes::Currency::delete_currency_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.iso.org/iso/support/currency_codes_list-1.htm The ISO 4217 data. AUTHOR
See Locale::Codes for full author history. Currently maintained by Sullivan Beck (sbeck@cpan.org). COPYRIGHT
Copyright (c) 1997-2001 Canon Research Centre Europe (CRE). Copyright (c) 2001 Michael Hennecke Copyright (c) 2001-2010 Neil Bowers Copyright (c) 2010-2012 Sullivan Beck This module is free software; you can redistribute it and/or modify it under the same terms as Perl itself. perl v5.16.2 2012-10-11 Locale::Codes::Currency(3pm)
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