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Top Forums Shell Programming and Scripting Comparing alternate lines of code Post 303025797 by Peasant on Monday 12th of November 2018 11:36:50 AM
Old 11-12-2018
Here is my effort to translate using input Smilie
Lines of input are enumerated to for easier grasp and are not in actual file / input the program is processing.
Code:
#
# Condition construct is met on line 1
# LAST2 is empty, LAST1 is defined as current processing line, or $0
#

1 a

#
# Condition construct is met on line 2
# LAST2 is defined as LAST1 (previous line), LAST1 as current processing line, or $0
# We do that till line 6, since condition is met, replacing the values of LAST1 / LAST2 accordingly.
#

2 b
3 c
4 d
5 e
6 f

#
# In this moment, on line 7, value of LAST1 is "f", while LAST2 is "e".
# Condition construct is not met for lines 7 to 10.
# LAST1/LAST2 do not change, nor those lines will be in output
#

7 e
8 f
9 e
10 f

#
# On line 11 LAST1 or LAST2 condition construct is met again.
# LAST2 is declared as "f", and LAST1 as "a" or $0 or current processing line
# The program continues to operate as above.
#

11 a
12 b
13 c
14 d
15 e
16 f

Hopefully that is correct.
Regards
Peasant.
 

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Net::Sieve::Script::Condition(3pm)			User Contributed Perl Documentation			Net::Sieve::Script::Condition(3pm)

NAME
Net::Sieve::Script::Condition - parse and write conditions in sieve scripts SYNOPSIS
use Net::Sieve::Script::Condition; my $cond = Net::Sieve::Script::Condition->new('header'); $cond->match_type(':contains'); $cond->key_list('"[Test4]"'); $cond->header_list('"Subject"'); print $cond->write(); or my $cond = Net::Sieve::Script::Condition->new( 'anyof ( header :contains "Subject" "[Test]", header :contains "Subject" "[Test2]")' ); print $cond->write(); DESCRIPTION
Parse and write condition part of Sieve rules, see Net::Sieve::Script. Support RFC 5228, 5231 (relationnal) and regex draft CONSTRUCTOR
new Match and set accessors for each condition object in conditions tree, "test" is mandatory Internal id : id for condition, set by creation order condition : array of sub conditions parent : parent of sub condition AllConds : array of pointers for all conditions Condition parts not : 'not' or nothing test : 'header', 'address', 'exists', ... key_list : "subject" or ["To", "Cc"] header_list : "text" or ["text1", "text2"] address_part : ':all ', ':localpart ', ... match_type : ':is ', ':contains ', ... comparator : string part METHODS
equals Purpose : test conditions Return : 1 on equals conditions write Purpose : write rule conditions in text format Return : multi-line formated text AUTHOR
Yves Agostini CPAN ID: YVESAGO Univ Metz agostini@univ-metz.fr http://www.crium.univ-metz.fr COPYRIGHT
This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself. The full text of the license can be found in the LICENSE file included with this module. perl v5.10.0 2008-09-15 Net::Sieve::Script::Condition(3pm)
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