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+<div class="subTitle">org.apache.spark.api.java.function</div>
+<h2 title="Interface Function0" class="title">Interface Function0&lt;R&gt;</h2>
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+<pre>public interface <span class="strong">Function0&lt;R&gt;</span>
+extends java.io.Serializable</pre>
+<div class="block">A zero-argument function that returns an R.</div>
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+<caption><span>Methods</span><span class="tabEnd">&nbsp;</span></caption>
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+<th class="colFirst" scope="col">Modifier and Type</th>
+<th class="colLast" scope="col">Method and Description</th>
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+<td class="colFirst"><code><a 
href="../../../../../../org/apache/spark/api/java/function/Function0.html" 
title="type parameter in Function0">R</a></code></td>
+<td class="colLast"><code><strong><a 
href="../../../../../../org/apache/spark/api/java/function/Function0.html#call()">call</a></strong>()</code>&nbsp;</td>
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href="../../../../../../org/apache/spark/api/java/function/Function0.html" 
title="type parameter in Function0">R</a>&nbsp;call()
+       throws Exception</pre>
+<dl><dt><span class="strong">Throws:</span></dt>
+<dd><code>Exception</code></dd></dl>
+</li>
+</ul>
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+<div class="subTitle">org.apache.spark.api.java.function</div>
+<h2 title="Interface Function2" class="title">Interface 
Function2&lt;T1,T2,R&gt;</h2>
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+<br>
+<pre>public interface <span class="strong">Function2&lt;T1,T2,R&gt;</span>
+extends java.io.Serializable</pre>
+<div class="block">A two-argument function that takes arguments of type T1 and 
T2 and returns an R.</div>
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+<caption><span>Methods</span><span class="tabEnd">&nbsp;</span></caption>
+<tr>
+<th class="colFirst" scope="col">Modifier and Type</th>
+<th class="colLast" scope="col">Method and Description</th>
+</tr>
+<tr class="altColor">
+<td class="colFirst"><code><a 
href="../../../../../../org/apache/spark/api/java/function/Function2.html" 
title="type parameter in Function2">R</a></code></td>
+<td class="colLast"><code><strong><a 
href="../../../../../../org/apache/spark/api/java/function/Function2.html#call(T1,%20T2)">call</a></strong>(<a
 href="../../../../../../org/apache/spark/api/java/function/Function2.html" 
title="type parameter in Function2">T1</a>&nbsp;v1,
+    <a 
href="../../../../../../org/apache/spark/api/java/function/Function2.html" 
title="type parameter in Function2">T2</a>&nbsp;v2)</code>&nbsp;</td>
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+<pre><a 
href="../../../../../../org/apache/spark/api/java/function/Function2.html" 
title="type parameter in Function2">R</a>&nbsp;call(<a 
href="../../../../../../org/apache/spark/api/java/function/Function2.html" 
title="type parameter in Function2">T1</a>&nbsp;v1,
+     <a 
href="../../../../../../org/apache/spark/api/java/function/Function2.html" 
title="type parameter in Function2">T2</a>&nbsp;v2)
+       throws Exception</pre>
+<dl><dt><span class="strong">Throws:</span></dt>
+<dd><code>Exception</code></dd></dl>
+</li>
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http://git-wip-us.apache.org/repos/asf/spark-website/blob/0b563c84/site/docs/2.1.2/api/java/org/apache/spark/api/java/function/Function3.html
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+<div class="subTitle">org.apache.spark.api.java.function</div>
+<h2 title="Interface Function3" class="title">Interface 
Function3&lt;T1,T2,T3,R&gt;</h2>
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+<div class="block">A three-argument function that takes arguments of type T1, 
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+<th class="colFirst" scope="col">Modifier and Type</th>
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title="type parameter in Function3">R</a></code></td>
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href="../../../../../../org/apache/spark/api/java/function/Function3.html#call(T1,%20T2,%20T3)">call</a></strong>(<a
 href="../../../../../../org/apache/spark/api/java/function/Function3.html" 
title="type parameter in Function3">T1</a>&nbsp;v1,
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href="../../../../../../org/apache/spark/api/java/function/Function3.html" 
title="type parameter in Function3">T2</a>&nbsp;v2,
+    <a 
href="../../../../../../org/apache/spark/api/java/function/Function3.html" 
title="type parameter in Function3">T3</a>&nbsp;v3)</code>&nbsp;</td>
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href="../../../../../../org/apache/spark/api/java/function/Function3.html" 
title="type parameter in Function3">R</a>&nbsp;call(<a 
href="../../../../../../org/apache/spark/api/java/function/Function3.html" 
title="type parameter in Function3">T1</a>&nbsp;v1,
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href="../../../../../../org/apache/spark/api/java/function/Function3.html" 
title="type parameter in Function3">T2</a>&nbsp;v2,
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href="../../../../../../org/apache/spark/api/java/function/Function3.html" 
title="type parameter in Function3">T3</a>&nbsp;v3)
+       throws Exception</pre>
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+<!-- ======== START OF CLASS DATA ======== -->
+<div class="header">
+<div class="subTitle">org.apache.spark.api.java.function</div>
+<h2 title="Interface Function4" class="title">Interface 
Function4&lt;T1,T2,T3,T4,R&gt;</h2>
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+<pre>public interface <span 
class="strong">Function4&lt;T1,T2,T3,T4,R&gt;</span>
+extends java.io.Serializable</pre>
+<div class="block">A four-argument function that takes arguments of type T1, 
T2, T3 and T4 and returns an R.</div>
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+<caption><span>Methods</span><span class="tabEnd">&nbsp;</span></caption>
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+<th class="colFirst" scope="col">Modifier and Type</th>
+<th class="colLast" scope="col">Method and Description</th>
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href="../../../../../../org/apache/spark/api/java/function/Function4.html" 
title="type parameter in Function4">R</a></code></td>
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href="../../../../../../org/apache/spark/api/java/function/Function4.html#call(T1,%20T2,%20T3,%20T4)">call</a></strong>(<a
 href="../../../../../../org/apache/spark/api/java/function/Function4.html" 
title="type parameter in Function4">T1</a>&nbsp;v1,
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href="../../../../../../org/apache/spark/api/java/function/Function4.html" 
title="type parameter in Function4">T2</a>&nbsp;v2,
+    <a 
href="../../../../../../org/apache/spark/api/java/function/Function4.html" 
title="type parameter in Function4">T3</a>&nbsp;v3,
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href="../../../../../../org/apache/spark/api/java/function/Function4.html" 
title="type parameter in Function4">T4</a>&nbsp;v4)</code>&nbsp;</td>
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href="../../../../../../org/apache/spark/api/java/function/Function4.html" 
title="type parameter in Function4">R</a>&nbsp;call(<a 
href="../../../../../../org/apache/spark/api/java/function/Function4.html" 
title="type parameter in Function4">T1</a>&nbsp;v1,
+     <a 
href="../../../../../../org/apache/spark/api/java/function/Function4.html" 
title="type parameter in Function4">T2</a>&nbsp;v2,
+     <a 
href="../../../../../../org/apache/spark/api/java/function/Function4.html" 
title="type parameter in Function4">T3</a>&nbsp;v3,
+     <a 
href="../../../../../../org/apache/spark/api/java/function/Function4.html" 
title="type parameter in Function4">T4</a>&nbsp;v4)
+       throws Exception</pre>
+<dl><dt><span class="strong">Throws:</span></dt>
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+</li>
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+</li>
+</ul>
+</li>
+</ul>
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+<div class="header">
+<div class="subTitle">org.apache.spark.api.java.function</div>
+<h2 title="Interface MapFunction" class="title">Interface 
MapFunction&lt;T,U&gt;</h2>
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+<dl>
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+<dd>java.io.Serializable</dd>
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+<br>
+<pre>public interface <span class="strong">MapFunction&lt;T,U&gt;</span>
+extends java.io.Serializable</pre>
+<div class="block">Base interface for a map function used in Dataset's map 
function.</div>
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summary="Method Summary table, listing methods, and an explanation">
+<caption><span>Methods</span><span class="tabEnd">&nbsp;</span></caption>
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+<th class="colFirst" scope="col">Modifier and Type</th>
+<th class="colLast" scope="col">Method and Description</th>
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href="../../../../../../org/apache/spark/api/java/function/MapFunction.html" 
title="type parameter in MapFunction">U</a></code></td>
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title="type parameter in MapFunction">T</a>&nbsp;value)</code>&nbsp;</td>
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href="../../../../../../org/apache/spark/api/java/function/MapFunction.html" 
title="type parameter in MapFunction">T</a>&nbsp;value)
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+<div class="subTitle">org.apache.spark.api.java.function</div>
+<h2 title="Interface MapGroupsFunction" class="title">Interface 
MapGroupsFunction&lt;K,V,R&gt;</h2>
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+<div class="contentContainer">
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+<br>
+<pre>public interface <span 
class="strong">MapGroupsFunction&lt;K,V,R&gt;</span>
+extends java.io.Serializable</pre>
+<div class="block">Base interface for a map function used in GroupedDataset's 
mapGroup function.</div>
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summary="Method Summary table, listing methods, and an explanation">
+<caption><span>Methods</span><span class="tabEnd">&nbsp;</span></caption>
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+<th class="colFirst" scope="col">Modifier and Type</th>
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+<td class="colFirst"><code><a 
href="../../../../../../org/apache/spark/api/java/function/MapGroupsFunction.html"
 title="type parameter in MapGroupsFunction">R</a></code></td>
+<td class="colLast"><code><strong><a 
href="../../../../../../org/apache/spark/api/java/function/MapGroupsFunction.html#call(K,%20java.util.Iterator)">call</a></strong>(<a
 
href="../../../../../../org/apache/spark/api/java/function/MapGroupsFunction.html"
 title="type parameter in MapGroupsFunction">K</a>&nbsp;key,
+    java.util.Iterator&lt;<a 
href="../../../../../../org/apache/spark/api/java/function/MapGroupsFunction.html"
 title="type parameter in 
MapGroupsFunction">V</a>&gt;&nbsp;values)</code>&nbsp;</td>
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href="../../../../../../org/apache/spark/api/java/function/MapGroupsFunction.html"
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href="../../../../../../org/apache/spark/api/java/function/MapGroupsFunction.html"
 title="type parameter in MapGroupsFunction">K</a>&nbsp;key,
+     java.util.Iterator&lt;<a 
href="../../../../../../org/apache/spark/api/java/function/MapGroupsFunction.html"
 title="type parameter in MapGroupsFunction">V</a>&gt;&nbsp;values)
+       throws Exception</pre>
+<dl><dt><span class="strong">Throws:</span></dt>
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+</li>
+</ul>
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+<div class="subTitle">org.apache.spark.api.java.function</div>
+<h2 title="Interface MapPartitionsFunction" class="title">Interface 
MapPartitionsFunction&lt;T,U&gt;</h2>
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class="strong">MapPartitionsFunction&lt;T,U&gt;</span>
+extends java.io.Serializable</pre>
+<div class="block">Base interface for function used in Dataset's 
mapPartitions.</div>
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+<caption><span>Methods</span><span class="tabEnd">&nbsp;</span></caption>
+<tr>
+<th class="colFirst" scope="col">Modifier and Type</th>
+<th class="colLast" scope="col">Method and Description</th>
+</tr>
+<tr class="altColor">
+<td class="colFirst"><code>java.util.Iterator&lt;<a 
href="../../../../../../org/apache/spark/api/java/function/MapPartitionsFunction.html"
 title="type parameter in MapPartitionsFunction">U</a>&gt;</code></td>
+<td class="colLast"><code><strong><a 
href="../../../../../../org/apache/spark/api/java/function/MapPartitionsFunction.html#call(java.util.Iterator)">call</a></strong>(java.util.Iterator&lt;<a
 
href="../../../../../../org/apache/spark/api/java/function/MapPartitionsFunction.html"
 title="type parameter in 
MapPartitionsFunction">T</a>&gt;&nbsp;input)</code>&nbsp;</td>
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+<pre>java.util.Iterator&lt;<a 
href="../../../../../../org/apache/spark/api/java/function/MapPartitionsFunction.html"
 title="type parameter in 
MapPartitionsFunction">U</a>&gt;&nbsp;call(java.util.Iterator&lt;<a 
href="../../../../../../org/apache/spark/api/java/function/MapPartitionsFunction.html"
 title="type parameter in MapPartitionsFunction">T</a>&gt;&nbsp;input)
+                           throws Exception</pre>
+<dl><dt><span class="strong">Throws:</span></dt>
+<dd><code>Exception</code></dd></dl>
+</li>
+</ul>
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+<div class="header">
+<div class="subTitle">org.apache.spark.api.java.function</div>
+<h2 title="Interface PairFlatMapFunction" class="title">Interface 
PairFlatMapFunction&lt;T,K,V&gt;</h2>
+</div>
+<div class="contentContainer">
+<div class="description">
+<ul class="blockList">
+<li class="blockList">
+<dl>
+<dt>All Superinterfaces:</dt>
+<dd>java.io.Serializable</dd>
+</dl>
+<hr>
+<br>
+<pre>public interface <span 
class="strong">PairFlatMapFunction&lt;T,K,V&gt;</span>
+extends java.io.Serializable</pre>
+<div class="block">A function that returns zero or more key-value pair records 
from each input record. The
+ key-value pairs are represented as scala.Tuple2 objects.</div>
+</li>
+</ul>
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summary="Method Summary table, listing methods, and an explanation">
+<caption><span>Methods</span><span class="tabEnd">&nbsp;</span></caption>
+<tr>
+<th class="colFirst" scope="col">Modifier and Type</th>
+<th class="colLast" scope="col">Method and Description</th>
+</tr>
+<tr class="altColor">
+<td class="colFirst"><code>java.util.Iterator&lt;scala.Tuple2&lt;<a 
href="../../../../../../org/apache/spark/api/java/function/PairFlatMapFunction.html"
 title="type parameter in PairFlatMapFunction">K</a>,<a 
href="../../../../../../org/apache/spark/api/java/function/PairFlatMapFunction.html"
 title="type parameter in PairFlatMapFunction">V</a>&gt;&gt;</code></td>
+<td class="colLast"><code><strong><a 
href="../../../../../../org/apache/spark/api/java/function/PairFlatMapFunction.html#call(T)">call</a></strong>(<a
 
href="../../../../../../org/apache/spark/api/java/function/PairFlatMapFunction.html"
 title="type parameter in PairFlatMapFunction">T</a>&nbsp;t)</code>&nbsp;</td>
+</tr>
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+</a><a name="call(T)">
+<!--   -->
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+<h4>call</h4>
+<pre>java.util.Iterator&lt;scala.Tuple2&lt;<a 
href="../../../../../../org/apache/spark/api/java/function/PairFlatMapFunction.html"
 title="type parameter in PairFlatMapFunction">K</a>,<a 
href="../../../../../../org/apache/spark/api/java/function/PairFlatMapFunction.html"
 title="type parameter in PairFlatMapFunction">V</a>&gt;&gt;&nbsp;call(<a 
href="../../../../../../org/apache/spark/api/java/function/PairFlatMapFunction.html"
 title="type parameter in PairFlatMapFunction">T</a>&nbsp;t)
+                                           throws Exception</pre>
+<dl><dt><span class="strong">Throws:</span></dt>
+<dd><code>Exception</code></dd></dl>
+</li>
+</ul>
+</li>
+</ul>
+</li>
+</ul>
+</div>
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+<div class="subTitle">org.apache.spark.api.java.function</div>
+<h2 title="Interface PairFunction" class="title">Interface 
PairFunction&lt;T,K,V&gt;</h2>
+</div>
+<div class="contentContainer">
+<div class="description">
+<ul class="blockList">
+<li class="blockList">
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+<dt>All Superinterfaces:</dt>
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+<br>
+<pre>public interface <span class="strong">PairFunction&lt;T,K,V&gt;</span>
+extends java.io.Serializable</pre>
+<div class="block">A function that returns key-value pairs (Tuple2&lt;K, 
V&gt;), and can be used to
+ construct PairRDDs.</div>
+</li>
+</ul>
+</div>
+<div class="summary">
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+<!-- ========== METHOD SUMMARY =========== -->
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+<table class="overviewSummary" border="0" cellpadding="3" cellspacing="0" 
summary="Method Summary table, listing methods, and an explanation">
+<caption><span>Methods</span><span class="tabEnd">&nbsp;</span></caption>
+<tr>
+<th class="colFirst" scope="col">Modifier and Type</th>
+<th class="colLast" scope="col">Method and Description</th>
+</tr>
+<tr class="altColor">
+<td class="colFirst"><code>scala.Tuple2&lt;<a 
href="../../../../../../org/apache/spark/api/java/function/PairFunction.html" 
title="type parameter in PairFunction">K</a>,<a 
href="../../../../../../org/apache/spark/api/java/function/PairFunction.html" 
title="type parameter in PairFunction">V</a>&gt;</code></td>
+<td class="colLast"><code><strong><a 
href="../../../../../../org/apache/spark/api/java/function/PairFunction.html#call(T)">call</a></strong>(<a
 href="../../../../../../org/apache/spark/api/java/function/PairFunction.html" 
title="type parameter in PairFunction">T</a>&nbsp;t)</code>&nbsp;</td>
+</tr>
+</table>
+</li>
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+</a><a name="call(T)">
+<!--   -->
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+<ul class="blockListLast">
+<li class="blockList">
+<h4>call</h4>
+<pre>scala.Tuple2&lt;<a 
href="../../../../../../org/apache/spark/api/java/function/PairFunction.html" 
title="type parameter in PairFunction">K</a>,<a 
href="../../../../../../org/apache/spark/api/java/function/PairFunction.html" 
title="type parameter in PairFunction">V</a>&gt;&nbsp;call(<a 
href="../../../../../../org/apache/spark/api/java/function/PairFunction.html" 
title="type parameter in PairFunction">T</a>&nbsp;t)
+                       throws Exception</pre>
+<dl><dt><span class="strong">Throws:</span></dt>
+<dd><code>Exception</code></dd></dl>
+</li>
+</ul>
+</li>
+</ul>
+</li>
+</ul>
+</div>
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+<div class="subTitle">org.apache.spark.api.java.function</div>
+<h2 title="Interface ReduceFunction" class="title">Interface 
ReduceFunction&lt;T&gt;</h2>
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+<dt>All Superinterfaces:</dt>
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+<pre>public interface <span class="strong">ReduceFunction&lt;T&gt;</span>
+extends java.io.Serializable</pre>
+<div class="block">Base interface for function used in Dataset's reduce.</div>
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summary="Method Summary table, listing methods, and an explanation">
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+<td class="colFirst"><code><a 
href="../../../../../../org/apache/spark/api/java/function/ReduceFunction.html" 
title="type parameter in ReduceFunction">T</a></code></td>
+<td class="colLast"><code><strong><a 
href="../../../../../../org/apache/spark/api/java/function/ReduceFunction.html#call(T,%20T)">call</a></strong>(<a
 
href="../../../../../../org/apache/spark/api/java/function/ReduceFunction.html" 
title="type parameter in ReduceFunction">T</a>&nbsp;v1,
+    <a 
href="../../../../../../org/apache/spark/api/java/function/ReduceFunction.html" 
title="type parameter in ReduceFunction">T</a>&nbsp;v2)</code>&nbsp;</td>
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+<h4>call</h4>
+<pre><a 
href="../../../../../../org/apache/spark/api/java/function/ReduceFunction.html" 
title="type parameter in ReduceFunction">T</a>&nbsp;call(<a 
href="../../../../../../org/apache/spark/api/java/function/ReduceFunction.html" 
title="type parameter in ReduceFunction">T</a>&nbsp;v1,
+     <a 
href="../../../../../../org/apache/spark/api/java/function/ReduceFunction.html" 
title="type parameter in ReduceFunction">T</a>&nbsp;v2)
+       throws Exception</pre>
+<dl><dt><span class="strong">Throws:</span></dt>
+<dd><code>Exception</code></dd></dl>
+</li>
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