$ListCmp: Difference between revisions
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<span class="pageSubtitle">Compare two $lists and produce $list describing differences</span> | <span class="pageSubtitle">Compare two $lists and produce $list describing differences</span> | ||
<p class=" | <p class="warn"><b>Note: </b>Many $functions have been deprecated in favor of Object Oriented methods. The OO equivalent for the $ListCmp function is the <var>[[Compare (Stringlist function)|Compare]]</var> function.</p> | ||
This function compares two $lists and produces a $list describing the differences between the $lists. | This function compares two $lists and produces a $list describing the differences between the $lists. | ||
The <var>$ListCmp</var> function accepts five arguments and returns a numeric result. It is a | The <var>$ListCmp</var> function accepts five arguments and returns a numeric result. It is a [[Calling Sirius Mods $functions|callable]] $function. | ||
The first argument is the identifier of a $list containing data with 8 byte sequence numbers. This is a required argument. | The first argument is the identifier of a $list containing data with 8 byte sequence numbers. This is a required argument. | ||
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==Syntax== | ==Syntax== | ||
<p class="syntax" | <p class="syntax">[%RESULT =] $ListCmp(list_id1, list_id2, list_id3, sync_count, pad) | ||
</p> | </p> | ||
<p><var class="term">%result</var> is set either to the number of items in the output $list, or to a negative error code if an error has occurred.</p> | |||
<p class="code"> | ===Error codes=== | ||
<p class="code">-3 - No room to create $list items | |||
(if LISTFC <var>$SirParm</var> parameter not set) | |||
-5 - Required argument not specified | |||
-6 - $List identifier invalid | |||
-7 - Invalid synchronization count | |||
-8 - Input $list 1 has invalid format | |||
</p> | </p> | ||
==Usage notes== | |||
<ul> | |||
<li>The output $list produced by <var>$ListCmp</var> is in a format that is suitable as input to <var>[[$ListUpd]]</var>. For example, if input $list 1 contains: | |||
<p class="code"> B | <p class="code">00010000B | ||
00020000 | |||
00030000PRINT 'QUENTIN COMPSON' | |||
00040000 | |||
00050000END | |||
</p> | |||
and input $list 2 contains: | |||
<p class="code">B | |||
PRINT 'QUENTIN COMPSON' | |||
PRINT 'HARVARD DIVING TEAM, 1908' | |||
END | |||
</p> | </p> | ||
Then this statement: | |||
<p class="code"> %RESULT = $ListCmp(%INLIST1, %INLIST2, %OUTLIST) | <p class="code">%RESULT = $ListCmp(%INLIST1, %INLIST2, %OUTLIST) | ||
</p> | </p> | ||
results in the $list identified by %OUTLIST containing: | |||
<p class="code"> | <p class="code">./ I 00030000 $ 00030001 00010000 | ||
PRINT 'HARVARD DIVING TEAM, 1908' | |||
</p> | </p> | ||
The first input $list to <var>$ListCmp</var> can be most easily created with the <var>$ProcDat</var> function using the third <var>$ProcDat</var> parameter to indicate a sequence number. | The first input $list to <var>$ListCmp</var> can be most easily created with the <var>$ProcDat</var> function using the third <var>$ProcDat</var> parameter to indicate a sequence number. | ||
</ul> | |||
==Products authorizing {{PAGENAMEE}}== | |||
<ul class="smallAndTightList"> | <ul class="smallAndTightList"> | ||
<li>[[SirLib]]</li> | <li>[[SirLib]]</li> | ||
</ul> | </ul> | ||
[[Category:$Functions|$ListCmp]] | [[Category:$Functions|$ListCmp]] | ||
Latest revision as of 22:51, 20 September 2018
Compare two $lists and produce $list describing differences
Note: Many $functions have been deprecated in favor of Object Oriented methods. The OO equivalent for the $ListCmp function is the Compare function.
This function compares two $lists and produces a $list describing the differences between the $lists.
The $ListCmp function accepts five arguments and returns a numeric result. It is a callable $function.
The first argument is the identifier of a $list containing data with 8 byte sequence numbers. This is a required argument.
The second argument is the identifier of a $list containing data without 8 byte sequence numbers. This is a required argument.
The third argument is the identifier of the output $list. This is a required argument.
The fourth argument is a number indicating a synchronization count. When the two input $lists are being compared and a difference has been found, this count indicates the number of lines that must match before they are treated as a true match. This is an optional argument and defaults to 1.
The fifth argument is a pad character to be used to pad any input line that is too short. This is an optional argument and defaults to blank.
Syntax
[%RESULT =] $ListCmp(list_id1, list_id2, list_id3, sync_count, pad)
%result is set either to the number of items in the output $list, or to a negative error code if an error has occurred.
Error codes
-3 - No room to create $list items (if LISTFC $SirParm parameter not set) -5 - Required argument not specified -6 - $List identifier invalid -7 - Invalid synchronization count -8 - Input $list 1 has invalid format
Usage notes
- The output $list produced by $ListCmp is in a format that is suitable as input to $ListUpd. For example, if input $list 1 contains:
00010000B 00020000 00030000PRINT 'QUENTIN COMPSON' 00040000 00050000END
and input $list 2 contains:
B PRINT 'QUENTIN COMPSON' PRINT 'HARVARD DIVING TEAM, 1908' END
Then this statement:
%RESULT = $ListCmp(%INLIST1, %INLIST2, %OUTLIST)
results in the $list identified by %OUTLIST containing:
./ I 00030000 $ 00030001 00010000 PRINT 'HARVARD DIVING TEAM, 1908'
The first input $list to $ListCmp can be most easily created with the $ProcDat function using the third $ProcDat parameter to indicate a sequence number.