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103 lines
18 KiB
HTML
<html xmlns:MSHelp="http://msdn.microsoft.com/mshelp" xmlns:mshelp="http://msdn.microsoft.com/mshelp"><head><link rel="SHORTCUT ICON" href="./../icons/favicon.ico" /><style type="text/css">.OH_CodeSnippetContainerTabLeftActive, .OH_CodeSnippetContainerTabLeft,.OH_CodeSnippetContainerTabLeftDisabled { }.OH_CodeSnippetContainerTabRightActive, .OH_CodeSnippetContainerTabRight,.OH_CodeSnippetContainerTabRightDisabled { }.OH_footer { }</style><link rel="stylesheet" type="text/css" href="./../styles/branding.css" /><link rel="stylesheet" type="text/css" href="./../styles/branding-en-US.css" /><style type="text/css">
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</style><script src="./../scripts/branding.js" type="text/javascript"><!----></script><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>DryadLinqQueryable.Fork(T, R1, R2) Method (IQueryable(T), Expression(Func(IEnumerable(T), IEnumerable(ForkTuple(R1, R2)))))</title><meta name="Language" content="en-us" /><meta name="Microsoft.Help.Id" content="M:Microsoft.Research.DryadLinq.DryadLinqQueryable.Fork``3(System.Linq.IQueryable{``0},System.Linq.Expressions.Expression{System.Func{System.Collections.Generic.IEnumerable{``0},System.Collections.Generic.IEnumerable{Microsoft.Research.DryadLinq.ForkTuple{``1,``2}}}})" /><meta name="Description" content="Forks a specified input dataset into two datasets. A specified user-defined function is applied to each partition of the input dataset to produce a sequence of ForkTuples." /><meta name="Microsoft.Help.ContentType" content="Reference" /><meta name="BrandingAware" content="'true'" /><meta name="container" content="Microsoft.Research.DryadLinq" /><meta name="file" content="7efe26f6-2ba5-a153-1022-ecec752e281d" /><meta name="guid" content="7efe26f6-2ba5-a153-1022-ecec752e281d" /><meta name="SelfBranded" content="true" /></head><body onload="onLoad()" class="primary-mtps-offline-document"><div class="OH_outerDiv"><div class="OH_outerContent"><table class="TitleTable"><tr><td class="OH_tdTitleColumn">DryadLinqQueryable<span id="ID0E0AB0BABAAA"> </span><script type="text/javascript">
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addToLanSpecTextIdSet("ID0E0AB0BABAAA?vb=.|cpp=::|cs=.|fs=.|nu=.");
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</script>Fork<span id="ID0E5BABAAA"> </span><script type="text/javascript">
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addToLanSpecTextIdSet("ID0E5BABAAA?vb=(Of |cpp=<|cs=<|fs=<'|nu=(");
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</script><span class="typeparameter">T</span>, <span class="typeparameter">R1</span>, <span class="typeparameter">R2</span><span id="ID0EYBABAAA"> </span><script type="text/javascript">
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addToLanSpecTextIdSet("ID0EYBABAAA?vb=)|cpp=>|cs=>|fs=>|nu=)");
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</script> Method (IQueryable<span id="ID0EWBABAAA"> </span><script type="text/javascript">
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addToLanSpecTextIdSet("ID0EWBABAAA?vb=(Of |cpp=<|cs=<|fs=<'|nu=(");
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</script><span class="typeparameter">T</span><span id="ID0EUBABAAA"> </span><script type="text/javascript">
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addToLanSpecTextIdSet("ID0EUBABAAA?vb=)|cpp=>|cs=>|fs=>|nu=)");
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</script>, Expression<span id="ID0ESBABAAA"> </span><script type="text/javascript">
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addToLanSpecTextIdSet("ID0ESBABAAA?vb=(Of |cpp=<|cs=<|fs=<'|nu=(");
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</script>Func<span id="ID0EQBABAAA"> </span><script type="text/javascript">
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addToLanSpecTextIdSet("ID0EQBABAAA?vb=(Of |cpp=<|cs=<|fs=<'|nu=(");
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</script>IEnumerable<span id="ID0EOBABAAA"> </span><script type="text/javascript">
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addToLanSpecTextIdSet("ID0EOBABAAA?vb=(Of |cpp=<|cs=<|fs=<'|nu=(");
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</script><span class="typeparameter">T</span><span id="ID0EMBABAAA"> </span><script type="text/javascript">
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addToLanSpecTextIdSet("ID0EMBABAAA?vb=)|cpp=>|cs=>|fs=>|nu=)");
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</script>, IEnumerable<span id="ID0EKBABAAA"> </span><script type="text/javascript">
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addToLanSpecTextIdSet("ID0EKBABAAA?vb=(Of |cpp=<|cs=<|fs=<'|nu=(");
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</script>ForkTuple<span id="ID0EIBABAAA"> </span><script type="text/javascript">
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addToLanSpecTextIdSet("ID0EIBABAAA?vb=(Of |cpp=<|cs=<|fs=<'|nu=(");
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</script><span class="typeparameter">R1</span>, <span class="typeparameter">R2</span><span id="ID0EEBABAAA"> </span><script type="text/javascript">
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addToLanSpecTextIdSet("ID0EEBABAAA?vb=)|cpp=>|cs=>|fs=>|nu=)");
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</script><span id="ID0EDBABAAA"> </span><script type="text/javascript">
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addToLanSpecTextIdSet("ID0EDBABAAA?vb=)|cpp=>|cs=>|fs=>|nu=)");
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</script><span id="ID0ECBABAAA"> </span><script type="text/javascript">
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addToLanSpecTextIdSet("ID0ECBABAAA?vb=)|cpp=>|cs=>|fs=>|nu=)");
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</script><span id="ID0EBBABAAA"> </span><script type="text/javascript">
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addToLanSpecTextIdSet("ID0EBBABAAA?vb=)|cpp=>|cs=>|fs=>|nu=)");
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</script>)</td><td class="OH_tdRunningTitleColumn">DryadLINQ documentation</td></tr></table><div id="mainSection"><div id="mainBody"><span class="introStyle"></span><div class="summary">
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Forks a specified input dataset into two datasets. A specified user-defined function is
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applied to each partition of the input dataset to produce a sequence of ForkTuples.
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</div><p></p><strong>Namespace:</strong> <a href="efe6507e-9fd8-bbd3-8227-fd6ba9e289c1.htm" target="">Microsoft.Research.DryadLinq</a><br /><strong>Assembly:</strong> <span sdata="assembly">Microsoft.Research.DryadLinq</span> (in Microsoft.Research.DryadLinq.dll) Version: 0.1.2.0 (0.1.2.0)<div class="OH_CollapsibleAreaRegion"><div class="OH_regiontitle">Syntax</div><div class="OH_CollapsibleArea_HrDiv"><hr class="OH_CollapsibleArea_Hr" /></div></div><div class="OH_clear"></div><div id="snippetGroup_Syntax" class="code"><div id="ID0ECXCAAAAA" class="OH_CodeSnippetContainer"><div class="OH_CodeSnippetContainerTabs" id="ID0ECXCAAAAA_tabs"><div class="OH_CodeSnippetContainerTabLeftActive" id="ID0ECXCAAAAA_tabimgleft"></div><div id="ID0ECXCAAAAA_tab1" class="OH_CodeSnippetContainerTabActive" EnableCopyCode="true"><a href="#" onclick="javascript:ChangeTab('ID0ECXCAAAAA','C#','1','4');return false;">C#</a></div><div id="ID0ECXCAAAAA_tab2" class="OH_CodeSnippetContainerTab" EnableCopyCode="true"><a href="#" onclick="javascript:ChangeTab('ID0ECXCAAAAA','Visual Basic','2','4');return false;">VB</a></div><div id="ID0ECXCAAAAA_tab3" class="OH_CodeSnippetContainerTab" EnableCopyCode="true"><a href="#" onclick="javascript:ChangeTab('ID0ECXCAAAAA','Visual C++','3','4');return false;">C++</a></div><div id="ID0ECXCAAAAA_tab4" class="OH_CodeSnippetContainerTabDisabledNotFirst" EnableCopyCode="true" disabled="true"><a>F#</a></div><div class="OH_CodeSnippetContainerTabRight" id="ID0ECXCAAAAA_tabimgright"></div></div><div id="ID0ECXCAAAAA_codecollection" class="OH_CodeSnippetContainerCodeCollection"><div class="OH_CodeSnippetToolBar"><div class="OH_CodeSnippetToolBarText"><a id="ID0ECXCAAAAA_ViewColorized" href="#" onclick="javascript:ExchangeTitleContent('ID0ECXCAAAAA','4')" title="View Colorized" style="display: none">View Colorized</a><a id="ID0ECXCAAAAA_copycode" href="#" onclick="javascript:CopyToClipboard('ID0ECXCAAAAA','4')" title="Copy to Clipboard">Copy to Clipboard</a><a id="ID0ECXCAAAAA_PrintText" class="OH_PrintText" href="#" onclick="javascript:Print('ID0ECXCAAAAA','4')" title="Print">Print</a></div></div><div id="ID0ECXCAAAAA_code_Div1" class="OH_CodeSnippetContainerCode" style="display: block"><pre><span class="keyword">public</span> <span class="keyword">static</span> <span class="identifier">IMultiQueryable</span><R1, R2> <span class="identifier">Fork</span><T, R1, R2>(
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<span class="keyword">this</span> <span class="identifier">IQueryable</span><T> <span class="parameter">source</span>,
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<span class="identifier">Expression</span><<span class="identifier">Func</span><<span class="identifier">IEnumerable</span><T>, <span class="identifier">IEnumerable</span><<span class="identifier">ForkTuple</span><R1, R2>>>> <span class="parameter">mapper</span>
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)</pre></div><div id="ID0ECXCAAAAA_code_Plain_Div1" class="OH_CodeSnippetContainerCode" style="display: none"><pre>public static IMultiQueryable<R1, R2> Fork<T, R1, R2>(
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this IQueryable<T> source,
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Expression<Func<IEnumerable<T>, IEnumerable<ForkTuple<R1, R2>>>> mapper
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)</pre></div><div id="ID0ECXCAAAAA_code_Div2" class="OH_CodeSnippetContainerCode" style="display: none"><pre><<span class="identifier">ExtensionAttribute</span>>
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<span class="keyword">Public</span> <span class="keyword">Shared</span> <span class="keyword">Function</span> <span class="identifier">Fork</span>(<span class="keyword">Of</span> T, R1, R2) (
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<span class="parameter">source</span> <span class="keyword">As</span> <span class="identifier">IQueryable</span>(<span class="keyword">Of</span> T),
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<span class="parameter">mapper</span> <span class="keyword">As</span> <span class="identifier">Expression</span>(<span class="keyword">Of</span> <span class="identifier">Func</span>(<span class="keyword">Of</span> <span class="identifier">IEnumerable</span>(<span class="keyword">Of</span> T), <span class="identifier">IEnumerable</span>(<span class="keyword">Of</span> <span class="identifier">ForkTuple</span>(<span class="keyword">Of</span> R1, R2))))
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) <span class="keyword">As</span> <span class="identifier">IMultiQueryable</span>(<span class="keyword">Of</span> R1, R2)</pre></div><div id="ID0ECXCAAAAA_code_Plain_Div2" class="OH_CodeSnippetContainerCode" style="display: none"><pre><ExtensionAttribute>
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Public Shared Function Fork(Of T, R1, R2) (
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source As IQueryable(Of T),
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mapper As Expression(Of Func(Of IEnumerable(Of T), IEnumerable(Of ForkTuple(Of R1, R2))))
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) As IMultiQueryable(Of R1, R2)</pre></div><div id="ID0ECXCAAAAA_code_Div3" class="OH_CodeSnippetContainerCode" style="display: none"><pre><span class="keyword">public</span>:
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[<span class="identifier">ExtensionAttribute</span>]
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<span class="keyword">generic</span><<span class="keyword">typename</span> T, <span class="keyword">typename</span> R1, <span class="keyword">typename</span> R2>
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<span class="keyword">static</span> <span class="identifier">IMultiQueryable</span><R1, R2>^ <span class="identifier">Fork</span>(
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<span class="identifier">IQueryable</span><T>^ <span class="parameter">source</span>,
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<span class="identifier">Expression</span><<span class="identifier">Func</span><<span class="identifier">IEnumerable</span><T>^, <span class="identifier">IEnumerable</span><<span class="identifier">ForkTuple</span><R1, R2>>^>^>^ <span class="parameter">mapper</span>
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)</pre></div><div id="ID0ECXCAAAAA_code_Plain_Div3" class="OH_CodeSnippetContainerCode" style="display: none"><pre>public:
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[ExtensionAttribute]
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generic<typename T, typename R1, typename R2>
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static IMultiQueryable<R1, R2>^ Fork(
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IQueryable<T>^ source,
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Expression<Func<IEnumerable<T>^, IEnumerable<ForkTuple<R1, R2>>^>^>^ mapper
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)</pre></div><div id="ID0ECXCAAAAA_code_Div4" class="OH_CodeSnippetContainerCode" style="display: none"><pre /></div><div id="ID0ECXCAAAAA_code_Plain_Div4" class="OH_CodeSnippetContainerCode" style="display: none"><pre /></div></div></div><script>addSpecificTextLanguageTagSet('ID0ECXCAAAAA');</script></div><div id="parameters"><h4 class="subHeading">Parameters</h4><dl paramName="source"><dt><span class="parameter">source</span></dt><dd>Type: <a href="http://msdn2.microsoft.com/en-us/library/bb351562" target="_blank">System.Linq<span id="ID0EBFABWCAAAAA"> </span><script type="text/javascript">
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addToLanSpecTextIdSet("ID0EBFABWCAAAAA?vb=.|cpp=::|cs=.|fs=.|nu=.");
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</script>IQueryable</a><span id="ID0EEABWCAAAAA"> </span><script type="text/javascript">
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addToLanSpecTextIdSet("ID0EEABWCAAAAA?vb=(Of |cpp=<|cs=<|fs=<'|nu=(");
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</script><span class="selflink"><span class="typeparam">T</span></span><span id="ID0ECABWCAAAAA"> </span><script type="text/javascript">
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addToLanSpecTextIdSet("ID0ECABWCAAAAA?vb=)|cpp=>|cs=>|fs=>|nu=)");
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</script><br /><span>The input dataset</span></dd></dl><dl paramName="mapper"><dt><span class="parameter">mapper</span></dt><dd>Type: <a href="http://msdn2.microsoft.com/en-us/library/bb335710" target="_blank">System.Linq.Expressions<span id="ID0EBVAAWCAAAAA"> </span><script type="text/javascript">
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addToLanSpecTextIdSet("ID0EBVAAWCAAAAA?vb=.|cpp=::|cs=.|fs=.|nu=.");
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</script>Expression</a><span id="ID0EUAAWCAAAAA"> </span><script type="text/javascript">
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addToLanSpecTextIdSet("ID0EUAAWCAAAAA?vb=(Of |cpp=<|cs=<|fs=<'|nu=(");
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</script><a href="http://msdn2.microsoft.com/en-us/library/bb549151" target="_blank">Func</a><span id="ID0ESAAWCAAAAA"> </span><script type="text/javascript">
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addToLanSpecTextIdSet("ID0ESAAWCAAAAA?vb=(Of |cpp=<|cs=<|fs=<'|nu=(");
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</script><a href="http://msdn2.microsoft.com/en-us/library/9eekhta0" target="_blank">IEnumerable</a><span id="ID0EQAAWCAAAAA"> </span><script type="text/javascript">
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addToLanSpecTextIdSet("ID0EQAAWCAAAAA?vb=(Of |cpp=<|cs=<|fs=<'|nu=(");
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</script><span class="selflink"><span class="typeparam">T</span></span><span id="ID0EOAAWCAAAAA"> </span><script type="text/javascript">
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addToLanSpecTextIdSet("ID0EOAAWCAAAAA?vb=)|cpp=>|cs=>|fs=>|nu=)");
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</script>, <a href="http://msdn2.microsoft.com/en-us/library/9eekhta0" target="_blank">IEnumerable</a><span id="ID0ELAAWCAAAAA"> </span><script type="text/javascript">
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addToLanSpecTextIdSet("ID0ELAAWCAAAAA?vb=(Of |cpp=<|cs=<|fs=<'|nu=(");
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</script><a href="28af6b37-22b3-448f-cf9f-ea15b5aa90d6.htm" target="">ForkTuple</a><span id="ID0EJAAWCAAAAA"> </span><script type="text/javascript">
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addToLanSpecTextIdSet("ID0EJAAWCAAAAA?vb=(Of |cpp=<|cs=<|fs=<'|nu=(");
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</script><span class="selflink"><span class="typeparam">R1</span></span>, <span class="selflink"><span class="typeparam">R2</span></span><span id="ID0EFAAWCAAAAA"> </span><script type="text/javascript">
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addToLanSpecTextIdSet("ID0EFAAWCAAAAA?vb=)|cpp=>|cs=>|fs=>|nu=)");
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</script><span id="ID0EEAAWCAAAAA"> </span><script type="text/javascript">
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addToLanSpecTextIdSet("ID0EEAAWCAAAAA?vb=)|cpp=>|cs=>|fs=>|nu=)");
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</script><span id="ID0EDAAWCAAAAA"> </span><script type="text/javascript">
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addToLanSpecTextIdSet("ID0EDAAWCAAAAA?vb=)|cpp=>|cs=>|fs=>|nu=)");
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</script><span id="ID0ECAAWCAAAAA"> </span><script type="text/javascript">
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addToLanSpecTextIdSet("ID0ECAAWCAAAAA?vb=)|cpp=>|cs=>|fs=>|nu=)");
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</script><br /><span>The function to apply to each partition of the input dataset</span></dd></dl></div><div class="OH_CollapsibleAreaRegion"><div class="OH_regiontitle">Type Parameters</div><div class="OH_CollapsibleArea_HrDiv"><hr class="OH_CollapsibleArea_Hr" /></div></div><div class="OH_clear"></div><dl><dt><span class="parameter">T</span></dt><dd>The type of the elements of source</dd><dt><span class="parameter">R1</span></dt><dd>The element type of the first output dataset</dd><dt><span class="parameter">R2</span></dt><dd>The element type of the second output dataset</dd></dl><h4 class="subHeading">Return Value</h4>Type: <a href="2f4da221-3f06-8d95-c5ef-20eef2574124.htm" target="">IMultiQueryable</a><span id="ID0ERCAAAAA"> </span><script type="text/javascript">
|
||
addToLanSpecTextIdSet("ID0ERCAAAAA?vb=(Of |cpp=<|cs=<|fs=<'|nu=(");
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</script><span class="selflink"><span class="typeparam">R1</span></span>, <span class="selflink"><span class="typeparam">R2</span></span><span id="ID0ENCAAAAA"> </span><script type="text/javascript">
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addToLanSpecTextIdSet("ID0ENCAAAAA?vb=)|cpp=>|cs=>|fs=>|nu=)");
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</script><br />An IMultiQueryable exposing two output datasets<h4 class="subHeading">Usage Note</h4>In Visual Basic and C#, you can call this method as an instance method on any object of type <a href="http://msdn2.microsoft.com/en-us/library/bb351562" target="_blank">IQueryable</a><span id="ID0EHCAAAAA"> </span><script type="text/javascript">
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addToLanSpecTextIdSet("ID0EHCAAAAA?vb=(Of |cpp=<|cs=<|fs=<'|nu=(");
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</script><span class="selflink"><span class="typeparam">T</span></span><span id="ID0EFCAAAAA"> </span><script type="text/javascript">
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addToLanSpecTextIdSet("ID0EFCAAAAA?vb=)|cpp=>|cs=>|fs=>|nu=)");
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</script>. When you use instance method syntax to call this method, omit the first parameter. For more information, see <a href="http://msdn.microsoft.com/en-us/library/bb384936.aspx" target="_blank">Extension Methods (Visual Basic)</a> or <a href="http://msdn.microsoft.com/en-us/library/bb383977.aspx" target="_blank">Extension Methods (C# Programming Guide)</a>.<a name="seeAlsoSection"><!----></a><div class="OH_CollapsibleAreaRegion"><div class="OH_regiontitle">See Also</div><div class="OH_CollapsibleArea_HrDiv"><hr class="OH_CollapsibleArea_Hr" /></div></div><div class="OH_clear"></div><div class="seeAlsoStyle"><a href="6d67ec6b-96ed-0a8b-0ad4-1c0568c7bf91.htm" target="">DryadLinqQueryable Class</a></div><div class="seeAlsoStyle"><a href="7f3c4d7e-cc6a-3e04-2d17-ad817bc05ccb.htm" target="">Fork Overload</a></div><div class="seeAlsoStyle"><a href="efe6507e-9fd8-bbd3-8227-fd6ba9e289c1.htm" target="">Microsoft.Research.DryadLinq Namespace</a></div></div></div></div></div><div id="OH_footer" class="OH_footer"><p /><div class="OH_feedbacklink"><a href="mailto:?subject=DryadLINQ+documentation+DryadLinqQueryable.Fork(T%2c+R1%2c+R2)+Method+(IQueryable(T)%2c+Expression(Func(IEnumerable(T)%2c+IEnumerable(ForkTuple(R1%2c+R2)))))+100+EN-US&body=Your%20feedback%20is%20used%20to%20improve%20the%20documentation%20and%20the%20product.%20Your%20e-mail%20address%20will%20not%20be%20used%20for%20any%20other%20purpose%20and%20is%20disposed%20of%20after%20the%20issue%20you%20report%20is%20resolved.%20While%20working%20to%20resolve%20the%20issue%20that%20you%20report%2c%20you%20may%20be%20contacted%20via%20e-mail%20to%20get%20further%20details%20or%20clarification%20on%20the%20feedback%20you%20sent.%20After%20the%20issue%20you%20report%20has%20been%20addressed%2c%20you%20may%20receive%20an%20e-mail%20to%20let%20you%20know%20that%20your%20feedback%20has%20been%20addressed.">Send Feedback</a> on this topic.</div></div></body></html> |