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    <language>en-us</language>    <build-info>
        <version>9.7.1</version>
        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[CSHARP-1608] Aggregation should have a $reverseArray expression.</title>
                <link>https://jira.mongodb.org/browse/CSHARP-1608</link>
                <project id="10041" key="CSHARP">C# Driver</project>
                    <description>&lt;h3&gt;&lt;a name=&quot;Syntax&quot;&gt;&lt;/a&gt;Syntax&lt;/h3&gt;
&lt;p/&gt;
&lt;div id=&quot;syntaxplugin&quot; class=&quot;syntaxplugin&quot; style=&quot;border: 1px dashed #bbb; border-radius: 5px !important; overflow: auto; max-height: 30em;&quot;&gt;
&lt;table cellspacing=&quot;0&quot; cellpadding=&quot;0&quot; border=&quot;0&quot; width=&quot;100%&quot; style=&quot;font-size: 1em; line-height: 1.4em !important; font-weight: normal; font-style: normal; color: black;&quot;&gt;
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					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   margin-bottom: 10px;  width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;{$reverseArray: &amp;lt;expression which evaluates to an array&amp;gt;}&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;
&lt;h3&gt;&lt;a name=&quot;Examples&quot;&gt;&lt;/a&gt;Examples&lt;/h3&gt;
&lt;h4&gt;&lt;a name=&quot;Input&quot;&gt;&lt;/a&gt;Input&lt;/h4&gt;
&lt;p/&gt;
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			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;
&lt;h4&gt;&lt;a name=&quot;Pipeline&quot;&gt;&lt;/a&gt;Pipeline&lt;/h4&gt;
&lt;p/&gt;
&lt;div id=&quot;syntaxplugin&quot; class=&quot;syntaxplugin&quot; style=&quot;border: 1px dashed #bbb; border-radius: 5px !important; overflow: auto; max-height: 30em;&quot;&gt;
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					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;db.coll.aggregate([{&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
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				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
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			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;        reversed: {$reverseArray: &lt;/span&gt;&lt;span style=&quot;color: blue; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;&quot;$a&quot;&lt;/span&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;}&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
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					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   margin-bottom: 10px;  width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;}])&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
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			&lt;/tbody&gt;
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&lt;/div&gt;
&lt;p/&gt;
&lt;h4&gt;&lt;a name=&quot;Output&quot;&gt;&lt;/a&gt;Output&lt;/h4&gt;
&lt;p/&gt;
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					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   margin-bottom: 10px;  width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;{_id: 0, reversed: [3, 2, 1]}&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
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&lt;/div&gt;
&lt;p/&gt;
&lt;h3&gt;&lt;a name=&quot;AdditionalNotes&quot;&gt;&lt;/a&gt;Additional Notes&lt;/h3&gt;
&lt;ul&gt;
	&lt;li&gt;Can be used in combination with $reduce to yield the equivalent of a $foldR.&lt;/li&gt;
	&lt;li&gt;Returns null if input is nullish.&lt;/li&gt;
	&lt;li&gt;Errors if input is not an array or nullish.&lt;/li&gt;
&lt;/ul&gt;


&lt;h3&gt;&lt;a name=&quot;OriginalDescription&quot;&gt;&lt;/a&gt;Original Description&lt;/h3&gt;
&lt;p&gt;Aggregation should support an $reverseArray expression, which accepts as input an expression that evaluates to an array, and outputs the reversed version of the array. Throws an error if the input is not an array or nullish.&lt;/p&gt;</description>
                <environment></environment>
        <key id="273376">CSHARP-1608</key>
            <summary>Aggregation should have a $reverseArray expression.</summary>
                <type id="2" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14711&amp;avatarType=issuetype">New Feature</type>
                                            <priority id="3" iconUrl="https://jira.mongodb.org/images/icons/priorities/major.svg">Major - P3</priority>
                        <status id="6" iconUrl="https://jira.mongodb.org/images/icons/statuses/closed.png" description="The issue is considered finished, the resolution is correct. Issues which are closed can be reopened.">Closed</status>
                    <statusCategory id="3" key="done" colorName="success"/>
                                    <resolution id="9">Done</resolution>
                                        <assignee username="craig.wilson@mongodb.com">Craig Wilson</assignee>
                                    <reporter username="rathi.gnanasekaran">Rathi Gnanasekaran</reporter>
                        <labels>
                    </labels>
                <created>Thu, 17 Mar 2016 18:08:05 +0000</created>
                <updated>Fri, 27 May 2022 01:35:48 +0000</updated>
                            <resolved>Tue, 23 Aug 2016 18:11:20 +0000</resolved>
                                                    <fixVersion>2.4</fixVersion>
                                    <component>Linq</component>
                                        <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="1397046" author="xgen-internal-githook" created="Thu, 29 Sep 2016 20:39:01 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;craiggwilson&apos;, u&apos;name&apos;: u&apos;Craig Wilson&apos;, u&apos;email&apos;: u&apos;craiggwilson@gmail.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/CSHARP-1608&quot; title=&quot;Aggregation should have a $reverseArray expression.&quot; class=&quot;issue-link&quot; data-issue-key=&quot;CSHARP-1608&quot;&gt;&lt;del&gt;CSHARP-1608&lt;/del&gt;&lt;/a&gt;: Added support for $reverseArray.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo-csharp-driver/commit/12d18e14d6493a4726461b1673885ba62f342696&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo-csharp-driver/commit/12d18e14d6493a4726461b1673885ba62f342696&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1392901" author="xgen-internal-githook" created="Sat, 24 Sep 2016 23:16:23 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;craiggwilson&apos;, u&apos;name&apos;: u&apos;Craig Wilson&apos;, u&apos;email&apos;: u&apos;craiggwilson@gmail.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/CSHARP-1608&quot; title=&quot;Aggregation should have a $reverseArray expression.&quot; class=&quot;issue-link&quot; data-issue-key=&quot;CSHARP-1608&quot;&gt;&lt;del&gt;CSHARP-1608&lt;/del&gt;&lt;/a&gt;: Added support for $reverseArray.&lt;br/&gt;
Branch: v2.4.x&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo-csharp-driver/commit/12d18e14d6493a4726461b1673885ba62f342696&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo-csharp-driver/commit/12d18e14d6493a4726461b1673885ba62f342696&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1390372" author="xgen-internal-githook" created="Wed, 21 Sep 2016 21:48:48 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;craiggwilson&apos;, u&apos;name&apos;: u&apos;Craig Wilson&apos;, u&apos;email&apos;: u&apos;craiggwilson@gmail.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/CSHARP-1608&quot; title=&quot;Aggregation should have a $reverseArray expression.&quot; class=&quot;issue-link&quot; data-issue-key=&quot;CSHARP-1608&quot;&gt;&lt;del&gt;CSHARP-1608&lt;/del&gt;&lt;/a&gt;: Added support for $reverseArray.&lt;br/&gt;
Branch: v2.4.x&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo-csharp-driver/commit/bdeabce087670396cca8b8cf6a10de48aed5a694&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo-csharp-driver/commit/bdeabce087670396cca8b8cf6a10de48aed5a694&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1386483" author="xgen-internal-githook" created="Fri, 16 Sep 2016 17:48:23 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;craiggwilson&apos;, u&apos;name&apos;: u&apos;Craig Wilson&apos;, u&apos;email&apos;: u&apos;craiggwilson@gmail.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/CSHARP-1608&quot; title=&quot;Aggregation should have a $reverseArray expression.&quot; class=&quot;issue-link&quot; data-issue-key=&quot;CSHARP-1608&quot;&gt;&lt;del&gt;CSHARP-1608&lt;/del&gt;&lt;/a&gt;: Added support for $reverseArray.&lt;br/&gt;
Branch: v2.4.x&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo-csharp-driver/commit/8952fe5b1845ab805b4b510b526cc518754cfef0&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo-csharp-driver/commit/8952fe5b1845ab805b4b510b526cc518754cfef0&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1373929" author="xgen-internal-githook" created="Wed, 31 Aug 2016 20:42:34 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;craiggwilson&apos;, u&apos;name&apos;: u&apos;Craig Wilson&apos;, u&apos;email&apos;: u&apos;craiggwilson@gmail.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/CSHARP-1608&quot; title=&quot;Aggregation should have a $reverseArray expression.&quot; class=&quot;issue-link&quot; data-issue-key=&quot;CSHARP-1608&quot;&gt;&lt;del&gt;CSHARP-1608&lt;/del&gt;&lt;/a&gt;: Added support for $reverseArray.&lt;br/&gt;
Branch: v2.4.x&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo-csharp-driver/commit/6ef2b5fe64ba5e01a8045847aacef68f4bcd4662&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo-csharp-driver/commit/6ef2b5fe64ba5e01a8045847aacef68f4bcd4662&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1370856" author="xgen-internal-githook" created="Mon, 29 Aug 2016 17:33:48 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;craiggwilson&apos;, u&apos;name&apos;: u&apos;Craig Wilson&apos;, u&apos;email&apos;: u&apos;craiggwilson@gmail.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/CSHARP-1608&quot; title=&quot;Aggregation should have a $reverseArray expression.&quot; class=&quot;issue-link&quot; data-issue-key=&quot;CSHARP-1608&quot;&gt;&lt;del&gt;CSHARP-1608&lt;/del&gt;&lt;/a&gt;: Added support for $reverseArray.&lt;br/&gt;
Branch: v2.4.x&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo-csharp-driver/commit/910548669dba4ec51db76ca60cc5e52e3e989b21&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo-csharp-driver/commit/910548669dba4ec51db76ca60cc5e52e3e989b21&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1365344" author="xgen-internal-githook" created="Tue, 23 Aug 2016 18:09:42 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;craiggwilson&apos;, u&apos;name&apos;: u&apos;Craig Wilson&apos;, u&apos;email&apos;: u&apos;craiggwilson@gmail.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/CSHARP-1608&quot; title=&quot;Aggregation should have a $reverseArray expression.&quot; class=&quot;issue-link&quot; data-issue-key=&quot;CSHARP-1608&quot;&gt;&lt;del&gt;CSHARP-1608&lt;/del&gt;&lt;/a&gt;: Added support for $reverseArray.&lt;br/&gt;
Branch: v2.4.x&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo-csharp-driver/commit/2b6ddcf9bd6fb85d85af03ecd2a10c5fe17f5cf7&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo-csharp-driver/commit/2b6ddcf9bd6fb85d85af03ecd2a10c5fe17f5cf7&lt;/a&gt;&lt;/p&gt;</comment>
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