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  7. <title>Class EnumerableExtensions
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  74. <article class="content wrap" id="_content" data-uid="IPA.Utilities.EnumerableExtensions">
  75. <h1 id="IPA_Utilities_EnumerableExtensions" data-uid="IPA.Utilities.EnumerableExtensions" class="text-break">Class EnumerableExtensions
  76. </h1>
  77. <div class="markdown level0 summary"><p>Extensions for <a class="xref" href="https://docs.microsoft.com/dotnet/api/system.collections.generic.ienumerable-1">IEnumerable&lt;T&gt;</a> that don&apos;t currently exist in <code>System.Linq</code>.</p>
  78. </div>
  79. <div class="markdown level0 conceptual"></div>
  80. <div class="inheritance">
  81. <h5>Inheritance</h5>
  82. <div class="level0"><a class="xref" href="https://docs.microsoft.com/dotnet/api/system.object">Object</a></div>
  83. <div class="level1"><span class="xref">EnumerableExtensions</span></div>
  84. </div>
  85. <div class="inheritedMembers">
  86. <h5>Inherited Members</h5>
  87. <div>
  88. <a class="xref" href="https://docs.microsoft.com/dotnet/api/system.object.tostring#System_Object_ToString">Object.ToString()</a>
  89. </div>
  90. <div>
  91. <a class="xref" href="https://docs.microsoft.com/dotnet/api/system.object.equals#System_Object_Equals_System_Object_">Object.Equals(Object)</a>
  92. </div>
  93. <div>
  94. <a class="xref" href="https://docs.microsoft.com/dotnet/api/system.object.equals#System_Object_Equals_System_Object_System_Object_">Object.Equals(Object, Object)</a>
  95. </div>
  96. <div>
  97. <a class="xref" href="https://docs.microsoft.com/dotnet/api/system.object.referenceequals#System_Object_ReferenceEquals_System_Object_System_Object_">Object.ReferenceEquals(Object, Object)</a>
  98. </div>
  99. <div>
  100. <a class="xref" href="https://docs.microsoft.com/dotnet/api/system.object.gethashcode#System_Object_GetHashCode">Object.GetHashCode()</a>
  101. </div>
  102. <div>
  103. <a class="xref" href="https://docs.microsoft.com/dotnet/api/system.object.gettype#System_Object_GetType">Object.GetType()</a>
  104. </div>
  105. <div>
  106. <a class="xref" href="https://docs.microsoft.com/dotnet/api/system.object.memberwiseclone#System_Object_MemberwiseClone">Object.MemberwiseClone()</a>
  107. </div>
  108. </div>
  109. <h6><strong>Namespace</strong>: <a class="xref" href="IPA.Utilities.html">IPA.Utilities</a></h6>
  110. <h6><strong>Assembly</strong>: IPA.Loader.dll</h6>
  111. <h5 id="IPA_Utilities_EnumerableExtensions_syntax">Syntax</h5>
  112. <div class="codewrapper">
  113. <pre><code class="lang-csharp hljs">public static class EnumerableExtensions</code></pre>
  114. </div>
  115. <h3 id="methods">Methods
  116. </h3>
  117. <span class="small pull-right mobile-hide">
  118. <span class="divider">|</span>
  119. <a href="https://github.com/beat-saber-modding-group/BeatSaber-IPA-Reloaded/new/4.0.0-beta/docs/override/new?filename=IPA_Utilities_EnumerableExtensions_Append__1_System_Collections_Generic_IEnumerable___0____0_.md&amp;value=---%0Auid%3A%20IPA.Utilities.EnumerableExtensions.Append%60%601(System.Collections.Generic.IEnumerable%7B%60%600%7D%2C%60%600)%0Asummary%3A%20'*You%20can%20override%20summary%20for%20the%20API%20here%20using%20*MARKDOWN*%20syntax'%0A---%0A%0A*Please%20type%20below%20more%20information%20about%20this%20API%3A*%0A%0A">Improve this Doc</a>
  120. </span>
  121. <span class="small pull-right mobile-hide">
  122. <a href="https://github.com/beat-saber-modding-group/BeatSaber-IPA-Reloaded/blob/098bf1888a224d49289736583cc5addcf20ddbbd/IPA.Loader/Utilities/EnumerableExtensions.cs/#L98">View Source</a>
  123. </span>
  124. <a id="IPA_Utilities_EnumerableExtensions_Append_" data-uid="IPA.Utilities.EnumerableExtensions.Append*"></a>
  125. <h4 id="IPA_Utilities_EnumerableExtensions_Append__1_System_Collections_Generic_IEnumerable___0____0_" data-uid="IPA.Utilities.EnumerableExtensions.Append``1(System.Collections.Generic.IEnumerable{``0},``0)">Append&lt;T&gt;(IEnumerable&lt;T&gt;, T)</h4>
  126. <div class="markdown level1 summary"><p>Adds a value to the end of the sequence.</p>
  127. </div>
  128. <div class="markdown level1 conceptual"></div>
  129. <h5 class="decalaration">Declaration</h5>
  130. <div class="codewrapper">
  131. <pre><code class="lang-csharp hljs">public static IEnumerable&lt;T&gt; Append&lt;T&gt;(this IEnumerable&lt;T&gt; seq, T app)</code></pre>
  132. </div>
  133. <h5 class="parameters">Parameters</h5>
  134. <table class="table table-bordered table-striped table-condensed">
  135. <thead>
  136. <tr>
  137. <th>Type</th>
  138. <th>Name</th>
  139. <th>Description</th>
  140. </tr>
  141. </thead>
  142. <tbody>
  143. <tr>
  144. <td><a class="xref" href="https://docs.microsoft.com/dotnet/api/system.collections.generic.ienumerable-1">IEnumerable</a>&lt;T&gt;</td>
  145. <td><span class="parametername">seq</span></td>
  146. <td><p>a sequence of values</p>
  147. </td>
  148. </tr>
  149. <tr>
  150. <td><span class="xref">T</span></td>
  151. <td><span class="parametername">app</span></td>
  152. <td><p>the value to append to <code data-dev-comment-type="paramref" class="paramref">seq</code></p>
  153. </td>
  154. </tr>
  155. </tbody>
  156. </table>
  157. <h5 class="returns">Returns</h5>
  158. <table class="table table-bordered table-striped table-condensed">
  159. <thead>
  160. <tr>
  161. <th>Type</th>
  162. <th>Description</th>
  163. </tr>
  164. </thead>
  165. <tbody>
  166. <tr>
  167. <td><a class="xref" href="https://docs.microsoft.com/dotnet/api/system.collections.generic.ienumerable-1">IEnumerable</a>&lt;T&gt;</td>
  168. <td><p>a new sequence ending with <code data-dev-comment-type="paramref" class="paramref">app</code></p>
  169. </td>
  170. </tr>
  171. </tbody>
  172. </table>
  173. <h5 class="typeParameters">Type Parameters</h5>
  174. <table class="table table-bordered table-striped table-condensed">
  175. <thead>
  176. <tr>
  177. <th>Name</th>
  178. <th>Description</th>
  179. </tr>
  180. </thead>
  181. <tbody>
  182. <tr>
  183. <td><span class="parametername">T</span></td>
  184. <td><p>the type of the elements of <code data-dev-comment-type="paramref" class="paramref">seq</code></p>
  185. </td>
  186. </tr>
  187. </tbody>
  188. </table>
  189. <span class="small pull-right mobile-hide">
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  191. <a href="https://github.com/beat-saber-modding-group/BeatSaber-IPA-Reloaded/new/4.0.0-beta/docs/override/new?filename=IPA_Utilities_EnumerableExtensions_NonNull__1_System_Collections_Generic_IEnumerable___0__.md&amp;value=---%0Auid%3A%20IPA.Utilities.EnumerableExtensions.NonNull%60%601(System.Collections.Generic.IEnumerable%7B%60%600%7D)%0Asummary%3A%20'*You%20can%20override%20summary%20for%20the%20API%20here%20using%20*MARKDOWN*%20syntax'%0A---%0A%0A*Please%20type%20below%20more%20information%20about%20this%20API%3A*%0A%0A">Improve this Doc</a>
  192. </span>
  193. <span class="small pull-right mobile-hide">
  194. <a href="https://github.com/beat-saber-modding-group/BeatSaber-IPA-Reloaded/blob/098bf1888a224d49289736583cc5addcf20ddbbd/IPA.Loader/Utilities/EnumerableExtensions.cs/#L173">View Source</a>
  195. </span>
  196. <a id="IPA_Utilities_EnumerableExtensions_NonNull_" data-uid="IPA.Utilities.EnumerableExtensions.NonNull*"></a>
  197. <h4 id="IPA_Utilities_EnumerableExtensions_NonNull__1_System_Collections_Generic_IEnumerable___0__" data-uid="IPA.Utilities.EnumerableExtensions.NonNull``1(System.Collections.Generic.IEnumerable{``0})">NonNull&lt;T&gt;(IEnumerable&lt;T&gt;)</h4>
  198. <div class="markdown level1 summary"><p>LINQ extension method that filters <span class="xref">null</span> elements out of an enumeration.</p>
  199. </div>
  200. <div class="markdown level1 conceptual"></div>
  201. <h5 class="decalaration">Declaration</h5>
  202. <div class="codewrapper">
  203. <pre><code class="lang-csharp hljs">public static IEnumerable&lt;T&gt; NonNull&lt;T&gt;(this IEnumerable&lt;T&gt; self)
  204. where T : class</code></pre>
  205. </div>
  206. <h5 class="parameters">Parameters</h5>
  207. <table class="table table-bordered table-striped table-condensed">
  208. <thead>
  209. <tr>
  210. <th>Type</th>
  211. <th>Name</th>
  212. <th>Description</th>
  213. </tr>
  214. </thead>
  215. <tbody>
  216. <tr>
  217. <td><a class="xref" href="https://docs.microsoft.com/dotnet/api/system.collections.generic.ienumerable-1">IEnumerable</a>&lt;T&gt;</td>
  218. <td><span class="parametername">self</span></td>
  219. <td><p>the enumeration to filter</p>
  220. </td>
  221. </tr>
  222. </tbody>
  223. </table>
  224. <h5 class="returns">Returns</h5>
  225. <table class="table table-bordered table-striped table-condensed">
  226. <thead>
  227. <tr>
  228. <th>Type</th>
  229. <th>Description</th>
  230. </tr>
  231. </thead>
  232. <tbody>
  233. <tr>
  234. <td><a class="xref" href="https://docs.microsoft.com/dotnet/api/system.collections.generic.ienumerable-1">IEnumerable</a>&lt;T&gt;</td>
  235. <td><p>a filtered enumerable</p>
  236. </td>
  237. </tr>
  238. </tbody>
  239. </table>
  240. <h5 class="typeParameters">Type Parameters</h5>
  241. <table class="table table-bordered table-striped table-condensed">
  242. <thead>
  243. <tr>
  244. <th>Name</th>
  245. <th>Description</th>
  246. </tr>
  247. </thead>
  248. <tbody>
  249. <tr>
  250. <td><span class="parametername">T</span></td>
  251. <td><p>the type of the enumeration</p>
  252. </td>
  253. </tr>
  254. </tbody>
  255. </table>
  256. <span class="small pull-right mobile-hide">
  257. <span class="divider">|</span>
  258. <a href="https://github.com/beat-saber-modding-group/BeatSaber-IPA-Reloaded/new/4.0.0-beta/docs/override/new?filename=IPA_Utilities_EnumerableExtensions_NonNull__1_System_Collections_Generic_IEnumerable_System_Nullable___0___.md&amp;value=---%0Auid%3A%20IPA.Utilities.EnumerableExtensions.NonNull%60%601(System.Collections.Generic.IEnumerable%7BSystem.Nullable%7B%60%600%7D%7D)%0Asummary%3A%20'*You%20can%20override%20summary%20for%20the%20API%20here%20using%20*MARKDOWN*%20syntax'%0A---%0A%0A*Please%20type%20below%20more%20information%20about%20this%20API%3A*%0A%0A">Improve this Doc</a>
  259. </span>
  260. <span class="small pull-right mobile-hide">
  261. <a href="https://github.com/beat-saber-modding-group/BeatSaber-IPA-Reloaded/blob/098bf1888a224d49289736583cc5addcf20ddbbd/IPA.Loader/Utilities/EnumerableExtensions.cs/#L193">View Source</a>
  262. </span>
  263. <a id="IPA_Utilities_EnumerableExtensions_NonNull_" data-uid="IPA.Utilities.EnumerableExtensions.NonNull*"></a>
  264. <h4 id="IPA_Utilities_EnumerableExtensions_NonNull__1_System_Collections_Generic_IEnumerable_System_Nullable___0___" data-uid="IPA.Utilities.EnumerableExtensions.NonNull``1(System.Collections.Generic.IEnumerable{System.Nullable{``0}})">NonNull&lt;T&gt;(IEnumerable&lt;Nullable&lt;T&gt;&gt;)</h4>
  265. <div class="markdown level1 summary"><p>LINQ extension method that filters <span class="xref">null</span> elements from an enumeration of nullable types.</p>
  266. </div>
  267. <div class="markdown level1 conceptual"></div>
  268. <h5 class="decalaration">Declaration</h5>
  269. <div class="codewrapper">
  270. <pre><code class="lang-csharp hljs">public static IEnumerable&lt;T&gt; NonNull&lt;T&gt;(this IEnumerable&lt;T?&gt; self)
  271. where T : struct</code></pre>
  272. </div>
  273. <h5 class="parameters">Parameters</h5>
  274. <table class="table table-bordered table-striped table-condensed">
  275. <thead>
  276. <tr>
  277. <th>Type</th>
  278. <th>Name</th>
  279. <th>Description</th>
  280. </tr>
  281. </thead>
  282. <tbody>
  283. <tr>
  284. <td><a class="xref" href="https://docs.microsoft.com/dotnet/api/system.collections.generic.ienumerable-1">IEnumerable</a>&lt;<a class="xref" href="https://docs.microsoft.com/dotnet/api/system.nullable-1">Nullable</a>&lt;T&gt;&gt;</td>
  285. <td><span class="parametername">self</span></td>
  286. <td><p>the enumeration to filter</p>
  287. </td>
  288. </tr>
  289. </tbody>
  290. </table>
  291. <h5 class="returns">Returns</h5>
  292. <table class="table table-bordered table-striped table-condensed">
  293. <thead>
  294. <tr>
  295. <th>Type</th>
  296. <th>Description</th>
  297. </tr>
  298. </thead>
  299. <tbody>
  300. <tr>
  301. <td><a class="xref" href="https://docs.microsoft.com/dotnet/api/system.collections.generic.ienumerable-1">IEnumerable</a>&lt;T&gt;</td>
  302. <td><p>a filtered enumerable</p>
  303. </td>
  304. </tr>
  305. </tbody>
  306. </table>
  307. <h5 class="typeParameters">Type Parameters</h5>
  308. <table class="table table-bordered table-striped table-condensed">
  309. <thead>
  310. <tr>
  311. <th>Name</th>
  312. <th>Description</th>
  313. </tr>
  314. </thead>
  315. <tbody>
  316. <tr>
  317. <td><span class="parametername">T</span></td>
  318. <td><p>the underlying type of the nullable enumeration</p>
  319. </td>
  320. </tr>
  321. </tbody>
  322. </table>
  323. <span class="small pull-right mobile-hide">
  324. <span class="divider">|</span>
  325. <a href="https://github.com/beat-saber-modding-group/BeatSaber-IPA-Reloaded/new/4.0.0-beta/docs/override/new?filename=IPA_Utilities_EnumerableExtensions_NonNull__2_System_Collections_Generic_IEnumerable___0__System_Func___0___1__.md&amp;value=---%0Auid%3A%20IPA.Utilities.EnumerableExtensions.NonNull%60%602(System.Collections.Generic.IEnumerable%7B%60%600%7D%2CSystem.Func%7B%60%600%2C%60%601%7D)%0Asummary%3A%20'*You%20can%20override%20summary%20for%20the%20API%20here%20using%20*MARKDOWN*%20syntax'%0A---%0A%0A*Please%20type%20below%20more%20information%20about%20this%20API%3A*%0A%0A">Improve this Doc</a>
  326. </span>
  327. <span class="small pull-right mobile-hide">
  328. <a href="https://github.com/beat-saber-modding-group/BeatSaber-IPA-Reloaded/blob/098bf1888a224d49289736583cc5addcf20ddbbd/IPA.Loader/Utilities/EnumerableExtensions.cs/#L184">View Source</a>
  329. </span>
  330. <a id="IPA_Utilities_EnumerableExtensions_NonNull_" data-uid="IPA.Utilities.EnumerableExtensions.NonNull*"></a>
  331. <h4 id="IPA_Utilities_EnumerableExtensions_NonNull__2_System_Collections_Generic_IEnumerable___0__System_Func___0___1__" data-uid="IPA.Utilities.EnumerableExtensions.NonNull``2(System.Collections.Generic.IEnumerable{``0},System.Func{``0,``1})">NonNull&lt;T, U&gt;(IEnumerable&lt;T&gt;, Func&lt;T, U&gt;)</h4>
  332. <div class="markdown level1 summary"><p>LINQ extension method that filters <span class="xref">null</span> elements out of an enumeration based on a converter.</p>
  333. </div>
  334. <div class="markdown level1 conceptual"></div>
  335. <h5 class="decalaration">Declaration</h5>
  336. <div class="codewrapper">
  337. <pre><code class="lang-csharp hljs">public static IEnumerable&lt;T&gt; NonNull&lt;T, U&gt;(this IEnumerable&lt;T&gt; self, Func&lt;T, U&gt; pred)
  338. where U : class</code></pre>
  339. </div>
  340. <h5 class="parameters">Parameters</h5>
  341. <table class="table table-bordered table-striped table-condensed">
  342. <thead>
  343. <tr>
  344. <th>Type</th>
  345. <th>Name</th>
  346. <th>Description</th>
  347. </tr>
  348. </thead>
  349. <tbody>
  350. <tr>
  351. <td><a class="xref" href="https://docs.microsoft.com/dotnet/api/system.collections.generic.ienumerable-1">IEnumerable</a>&lt;T&gt;</td>
  352. <td><span class="parametername">self</span></td>
  353. <td><p>the enumeration to filter</p>
  354. </td>
  355. </tr>
  356. <tr>
  357. <td><a class="xref" href="https://docs.microsoft.com/dotnet/api/system.func-2">Func</a>&lt;T, U&gt;</td>
  358. <td><span class="parametername">pred</span></td>
  359. <td><p>the predicate to select for filtering</p>
  360. </td>
  361. </tr>
  362. </tbody>
  363. </table>
  364. <h5 class="returns">Returns</h5>
  365. <table class="table table-bordered table-striped table-condensed">
  366. <thead>
  367. <tr>
  368. <th>Type</th>
  369. <th>Description</th>
  370. </tr>
  371. </thead>
  372. <tbody>
  373. <tr>
  374. <td><a class="xref" href="https://docs.microsoft.com/dotnet/api/system.collections.generic.ienumerable-1">IEnumerable</a>&lt;T&gt;</td>
  375. <td><p>a filtered enumerable</p>
  376. </td>
  377. </tr>
  378. </tbody>
  379. </table>
  380. <h5 class="typeParameters">Type Parameters</h5>
  381. <table class="table table-bordered table-striped table-condensed">
  382. <thead>
  383. <tr>
  384. <th>Name</th>
  385. <th>Description</th>
  386. </tr>
  387. </thead>
  388. <tbody>
  389. <tr>
  390. <td><span class="parametername">T</span></td>
  391. <td><p>the type of the enumeration</p>
  392. </td>
  393. </tr>
  394. <tr>
  395. <td><span class="parametername">U</span></td>
  396. <td><p>the type to compare to null</p>
  397. </td>
  398. </tr>
  399. </tbody>
  400. </table>
  401. <span class="small pull-right mobile-hide">
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  407. </span>
  408. <a id="IPA_Utilities_EnumerableExtensions_Prepend_" data-uid="IPA.Utilities.EnumerableExtensions.Prepend*"></a>
  409. <h4 id="IPA_Utilities_EnumerableExtensions_Prepend__1_System_Collections_Generic_IEnumerable___0____0_" data-uid="IPA.Utilities.EnumerableExtensions.Prepend``1(System.Collections.Generic.IEnumerable{``0},``0)">Prepend&lt;T&gt;(IEnumerable&lt;T&gt;, T)</h4>
  410. <div class="markdown level1 summary"><p>Adds a value to the beginning of the sequence.</p>
  411. </div>
  412. <div class="markdown level1 conceptual"></div>
  413. <h5 class="decalaration">Declaration</h5>
  414. <div class="codewrapper">
  415. <pre><code class="lang-csharp hljs">public static IEnumerable&lt;T&gt; Prepend&lt;T&gt;(this IEnumerable&lt;T&gt; seq, T prep)</code></pre>
  416. </div>
  417. <h5 class="parameters">Parameters</h5>
  418. <table class="table table-bordered table-striped table-condensed">
  419. <thead>
  420. <tr>
  421. <th>Type</th>
  422. <th>Name</th>
  423. <th>Description</th>
  424. </tr>
  425. </thead>
  426. <tbody>
  427. <tr>
  428. <td><a class="xref" href="https://docs.microsoft.com/dotnet/api/system.collections.generic.ienumerable-1">IEnumerable</a>&lt;T&gt;</td>
  429. <td><span class="parametername">seq</span></td>
  430. <td><p>a sequence of values</p>
  431. </td>
  432. </tr>
  433. <tr>
  434. <td><span class="xref">T</span></td>
  435. <td><span class="parametername">prep</span></td>
  436. <td><p>the value to prepend to <code data-dev-comment-type="paramref" class="paramref">seq</code></p>
  437. </td>
  438. </tr>
  439. </tbody>
  440. </table>
  441. <h5 class="returns">Returns</h5>
  442. <table class="table table-bordered table-striped table-condensed">
  443. <thead>
  444. <tr>
  445. <th>Type</th>
  446. <th>Description</th>
  447. </tr>
  448. </thead>
  449. <tbody>
  450. <tr>
  451. <td><a class="xref" href="https://docs.microsoft.com/dotnet/api/system.collections.generic.ienumerable-1">IEnumerable</a>&lt;T&gt;</td>
  452. <td><p>a new sequence beginning with <code data-dev-comment-type="paramref" class="paramref">prep</code></p>
  453. </td>
  454. </tr>
  455. </tbody>
  456. </table>
  457. <h5 class="typeParameters">Type Parameters</h5>
  458. <table class="table table-bordered table-striped table-condensed">
  459. <thead>
  460. <tr>
  461. <th>Name</th>
  462. <th>Description</th>
  463. </tr>
  464. </thead>
  465. <tbody>
  466. <tr>
  467. <td><span class="parametername">T</span></td>
  468. <td><p>the type of the elements of <code data-dev-comment-type="paramref" class="paramref">seq</code></p>
  469. </td>
  470. </tr>
  471. </tbody>
  472. </table>
  473. </article>
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