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<html xmlns="http://www.w3.org/1999/xhtml"><head><title>Lwt_list (lwt.Lwt_list)</title><meta charset="utf-8"/><link rel="stylesheet" href="../../_odoc-theme/odoc.css"/><meta name="generator" content="odoc 3.1.0"/><meta name="viewport" content="width=device-width,initial-scale=1.0"/><script src="../../highlight.pack.js"></script><script>hljs.initHighlightingOnLoad();</script></head><body class="odoc"><nav class="odoc-nav"><a href="../index.html">Up</a> <a href="../../index.html">Index</a> &#x00BB; <a href="../index.html">lwt</a> &#x00BB; Lwt_list</nav><header class="odoc-preamble"><h1>Module <code><span>Lwt_list</span></code></h1><p>List helpers</p></header><div class="odoc-tocs"><nav class="odoc-toc odoc-local-toc"><ul><li><a href="#list-iterators">List iterators</a></li><li><a href="#list-scanning">List scanning</a></li><li><a href="#list-searching">List searching</a></li></ul></nav></div><div class="odoc-content"><p>Note: this module use the same naming convention as <a href="../Lwt_stream/index.html"><code>Lwt_stream</code></a>.</p><h3 id="list-iterators"><a href="#list-iterators" class="anchor"></a>List iterators</h3><div class="odoc-spec"><div class="spec value anchored" id="val-iter_s"><a href="#val-iter_s" class="anchor"></a><code><span><span class="keyword">val</span> iter_s : <span><span>(<span><span class="type-var">'a</span> <span class="arrow">&#45;&gt;</span></span> <span>unit <a href="../Lwt/index.html#type-t">Lwt.t</a></span>)</span> <span class="arrow">&#45;&gt;</span></span> <span><span><span class="type-var">'a</span> list</span> <span class="arrow">&#45;&gt;</span></span> <span>unit <a href="../Lwt/index.html#type-t">Lwt.t</a></span></span></code></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-iter_p"><a href="#val-iter_p" class="anchor"></a><code><span><span class="keyword">val</span> iter_p : <span><span>(<span><span class="type-var">'a</span> <span class="arrow">&#45;&gt;</span></span> <span>unit <a href="../Lwt/index.html#type-t">Lwt.t</a></span>)</span> <span class="arrow">&#45;&gt;</span></span> <span><span><span class="type-var">'a</span> list</span> <span class="arrow">&#45;&gt;</span></span> <span>unit <a href="../Lwt/index.html#type-t">Lwt.t</a></span></span></code></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-iteri_s"><a href="#val-iteri_s" class="anchor"></a><code><span><span class="keyword">val</span> iteri_s : <span><span>(<span>int <span class="arrow">&#45;&gt;</span></span> <span><span class="type-var">'a</span> <span class="arrow">&#45;&gt;</span></span> <span>unit <a href="../Lwt/index.html#type-t">Lwt.t</a></span>)</span> <span class="arrow">&#45;&gt;</span></span> <span><span><span class="type-var">'a</span> list</span> <span class="arrow">&#45;&gt;</span></span> <span>unit <a href="../Lwt/index.html#type-t">Lwt.t</a></span></span></code></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-iteri_p"><a href="#val-iteri_p" class="anchor"></a><code><span><span class="keyword">val</span> iteri_p : <span><span>(<span>int <span class="arrow">&#45;&gt;</span></span> <span><span class="type-var">'a</span> <span class="arrow">&#45;&gt;</span></span> <span>unit <a href="../Lwt/index.html#type-t">Lwt.t</a></span>)</span> <span class="arrow">&#45;&gt;</span></span> <span><span><span class="type-var">'a</span> list</span> <span class="arrow">&#45;&gt;</span></span> <span>unit <a href="../Lwt/index.html#type-t">Lwt.t</a></span></span></code></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-map_s"><a href="#val-map_s" class="anchor"></a><code><span><span class="keyword">val</span> map_s : <span><span>(<span><span class="type-var">'a</span> <span class="arrow">&#45;&gt;</span></span> <span><span class="type-var">'b</span> <a href="../Lwt/index.html#type-t">Lwt.t</a></span>)</span> <span class="arrow">&#45;&gt;</span></span> <span><span><span class="type-var">'a</span> list</span> <span class="arrow">&#45;&gt;</span></span> <span><span><span class="type-var">'b</span> list</span> <a href="../Lwt/index.html#type-t">Lwt.t</a></span></span></code></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-map_p"><a href="#val-map_p" class="anchor"></a><code><span><span class="keyword">val</span> map_p : <span><span>(<span><span class="type-var">'a</span> <span class="arrow">&#45;&gt;</span></span> <span><span class="type-var">'b</span> <a href="../Lwt/index.html#type-t">Lwt.t</a></span>)</span> <span class="arrow">&#45;&gt;</span></span> <span><span><span class="type-var">'a</span> list</span> <span class="arrow">&#45;&gt;</span></span> <span><span><span class="type-var">'b</span> list</span> <a href="../Lwt/index.html#type-t">Lwt.t</a></span></span></code></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-mapi_s"><a href="#val-mapi_s" class="anchor"></a><code><span><span class="keyword">val</span> mapi_s : <span><span>(<span>int <span class="arrow">&#45;&gt;</span></span> <span><span class="type-var">'a</span> <span class="arrow">&#45;&gt;</span></span> <span><span class="type-var">'b</span> <a href="../Lwt/index.html#type-t">Lwt.t</a></span>)</span> <span class="arrow">&#45;&gt;</span></span> <span><span><span class="type-var">'a</span> list</span> <span class="arrow">&#45;&gt;</span></span> <span><span><span class="type-var">'b</span> list</span> <a href="../Lwt/index.html#type-t">Lwt.t</a></span></span></code></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-mapi_p"><a href="#val-mapi_p" class="anchor"></a><code><span><span class="keyword">val</span> mapi_p : <span><span>(<span>int <span class="arrow">&#45;&gt;</span></span> <span><span class="type-var">'a</span> <span class="arrow">&#45;&gt;</span></span> <span><span class="type-var">'b</span> <a href="../Lwt/index.html#type-t">Lwt.t</a></span>)</span> <span class="arrow">&#45;&gt;</span></span> <span><span><span class="type-var">'a</span> list</span> <span class="arrow">&#45;&gt;</span></span> <span><span><span class="type-var">'b</span> list</span> <a href="../Lwt/index.html#type-t">Lwt.t</a></span></span></code></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-rev_map_s"><a href="#val-rev_map_s" class="anchor"></a><code><span><span class="keyword">val</span> rev_map_s : <span><span>(<span><span class="type-var">'a</span> <span class="arrow">&#45;&gt;</span></span> <span><span class="type-var">'b</span> <a href="../Lwt/index.html#type-t">Lwt.t</a></span>)</span> <span class="arrow">&#45;&gt;</span></span> <span><span><span class="type-var">'a</span> list</span> <span class="arrow">&#45;&gt;</span></span> <span><span><span class="type-var">'b</span> list</span> <a href="../Lwt/index.html#type-t">Lwt.t</a></span></span></code></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-rev_map_p"><a href="#val-rev_map_p" class="anchor"></a><code><span><span class="keyword">val</span> rev_map_p : <span><span>(<span><span class="type-var">'a</span> <span class="arrow">&#45;&gt;</span></span> <span><span class="type-var">'b</span> <a href="../Lwt/index.html#type-t">Lwt.t</a></span>)</span> <span class="arrow">&#45;&gt;</span></span> <span><span><span class="type-var">'a</span> list</span> <span class="arrow">&#45;&gt;</span></span> <span><span><span class="type-var">'b</span> list</span> <a href="../Lwt/index.html#type-t">Lwt.t</a></span></span></code></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-fold_left_s"><a href="#val-fold_left_s" class="anchor"></a><code><span><span class="keyword">val</span> fold_left_s : <span><span>(<span><span class="type-var">'a</span> <span class="arrow">&#45;&gt;</span></span> <span><span class="type-var">'b</span> <span class="arrow">&#45;&gt;</span></span> <span><span class="type-var">'a</span> <a href="../Lwt/index.html#type-t">Lwt.t</a></span>)</span> <span class="arrow">&#45;&gt;</span></span> <span><span class="type-var">'a</span> <span class="arrow">&#45;&gt;</span></span> <span><span><span class="type-var">'b</span> list</span> <span class="arrow">&#45;&gt;</span></span> <span><span class="type-var">'a</span> <a href="../Lwt/index.html#type-t">Lwt.t</a></span></span></code></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-fold_right_s"><a href="#val-fold_right_s" class="anchor"></a><code><span><span class="keyword">val</span> fold_right_s : <span><span>(<span><span class="type-var">'a</span> <span class="arrow">&#45;&gt;</span></span> <span><span class="type-var">'b</span> <span class="arrow">&#45;&gt;</span></span> <span><span class="type-var">'b</span> <a href="../Lwt/index.html#type-t">Lwt.t</a></span>)</span> <span class="arrow">&#45;&gt;</span></span> <span><span><span class="type-var">'a</span> list</span> <span class="arrow">&#45;&gt;</span></span> <span><span class="type-var">'b</span> <span class="arrow">&#45;&gt;</span></span> <span><span class="type-var">'b</span> <a href="../Lwt/index.html#type-t">Lwt.t</a></span></span></code></div></div><h3 id="list-scanning"><a href="#list-scanning" class="anchor"></a>List scanning</h3><div class="odoc-spec"><div class="spec value anchored" id="val-for_all_s"><a href="#val-for_all_s" class="anchor"></a><code><span><span class="keyword">val</span> for_all_s : <span><span>(<span><span class="type-var">'a</span> <span class="arrow">&#45;&gt;</span></span> <span>bool <a href="../Lwt/index.html#type-t">Lwt.t</a></span>)</span> <span class="arrow">&#45;&gt;</span></span> <span><span><span class="type-var">'a</span> list</span> <span class="arrow">&#45;&gt;</span></span> <span>bool <a href="../Lwt/index.html#type-t">Lwt.t</a></span></span></code></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-for_all_p"><a href="#val-for_all_p" class="anchor"></a><code><span><span class="keyword">val</span> for_all_p : <span><span>(<span><span class="type-var">'a</span> <span class="arrow">&#45;&gt;</span></span> <span>bool <a href="../Lwt/index.html#type-t">Lwt.t</a></span>)</span> <span class="arrow">&#45;&gt;</span></span> <span><span><span class="type-var">'a</span> list</span> <span class="arrow">&#45;&gt;</span></span> <span>bool <a href="../Lwt/index.html#type-t">Lwt.t</a></span></span></code></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-exists_s"><a href="#val-exists_s" class="anchor"></a><code><span><span class="keyword">val</span> exists_s : <span><span>(<span><span class="type-var">'a</span> <span class="arrow">&#45;&gt;</span></span> <span>bool <a href="../Lwt/index.html#type-t">Lwt.t</a></span>)</span> <span class="arrow">&#45;&gt;</span></span> <span><span><span class="type-var">'a</span> list</span> <span class="arrow">&#45;&gt;</span></span> <span>bool <a href="../Lwt/index.html#type-t">Lwt.t</a></span></span></code></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-exists_p"><a href="#val-exists_p" class="anchor"></a><code><span><span class="keyword">val</span> exists_p : <span><span>(<span><span class="type-var">'a</span> <span class="arrow">&#45;&gt;</span></span> <span>bool <a href="../Lwt/index.html#type-t">Lwt.t</a></span>)</span> <span class="arrow">&#45;&gt;</span></span> <span><span><span class="type-var">'a</span> list</span> <span class="arrow">&#45;&gt;</span></span> <span>bool <a href="../Lwt/index.html#type-t">Lwt.t</a></span></span></code></div></div><h3 id="list-searching"><a href="#list-searching" class="anchor"></a>List searching</h3><div class="odoc-spec"><div class="spec value anchored" id="val-find_s"><a href="#val-find_s" class="anchor"></a><code><span><span class="keyword">val</span> find_s : <span><span>(<span><span class="type-var">'a</span> <span class="arrow">&#45;&gt;</span></span> <span>bool <a href="../Lwt/index.html#type-t">Lwt.t</a></span>)</span> <span class="arrow">&#45;&gt;</span></span> <span><span><span class="type-var">'a</span> list</span> <span class="arrow">&#45;&gt;</span></span> <span><span class="type-var">'a</span> <a href="../Lwt/index.html#type-t">Lwt.t</a></span></span></code></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-filter_s"><a href="#val-filter_s" class="anchor"></a><code><span><span class="keyword">val</span> filter_s : <span><span>(<span><span class="type-var">'a</span> <span class="arrow">&#45;&gt;</span></span> <span>bool <a href="../Lwt/index.html#type-t">Lwt.t</a></span>)</span> <span class="arrow">&#45;&gt;</span></span> <span><span><span class="type-var">'a</span> list</span> <span class="arrow">&#45;&gt;</span></span> <span><span><span class="type-var">'a</span> list</span> <a href="../Lwt/index.html#type-t">Lwt.t</a></span></span></code></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-filter_p"><a href="#val-filter_p" class="anchor"></a><code><span><span class="keyword">val</span> filter_p : <span><span>(<span><span class="type-var">'a</span> <span class="arrow">&#45;&gt;</span></span> <span>bool <a href="../Lwt/index.html#type-t">Lwt.t</a></span>)</span> <span class="arrow">&#45;&gt;</span></span> <span><span><span class="type-var">'a</span> list</span> <span class="arrow">&#45;&gt;</span></span> <span><span><span class="type-var">'a</span> list</span> <a href="../Lwt/index.html#type-t">Lwt.t</a></span></span></code></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-filter_map_s"><a href="#val-filter_map_s" class="anchor"></a><code><span><span class="keyword">val</span> filter_map_s : <span><span>(<span><span class="type-var">'a</span> <span class="arrow">&#45;&gt;</span></span> <span><span><span class="type-var">'b</span> option</span> <a href="../Lwt/index.html#type-t">Lwt.t</a></span>)</span> <span class="arrow">&#45;&gt;</span></span> <span><span><span class="type-var">'a</span> list</span> <span class="arrow">&#45;&gt;</span></span> <span><span><span class="type-var">'b</span> list</span> <a href="../Lwt/index.html#type-t">Lwt.t</a></span></span></code></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-filter_map_p"><a href="#val-filter_map_p" class="anchor"></a><code><span><span class="keyword">val</span> filter_map_p : <span><span>(<span><span class="type-var">'a</span> <span class="arrow">&#45;&gt;</span></span> <span><span><span class="type-var">'b</span> option</span> <a href="../Lwt/index.html#type-t">Lwt.t</a></span>)</span> <span class="arrow">&#45;&gt;</span></span> <span><span><span class="type-var">'a</span> list</span> <span class="arrow">&#45;&gt;</span></span> <span><span><span class="type-var">'b</span> list</span> <a href="../Lwt/index.html#type-t">Lwt.t</a></span></span></code></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-partition_s"><a href="#val-partition_s" class="anchor"></a><code><span><span class="keyword">val</span> partition_s : <span><span>(<span><span class="type-var">'a</span> <span class="arrow">&#45;&gt;</span></span> <span>bool <a href="../Lwt/index.html#type-t">Lwt.t</a></span>)</span> <span class="arrow">&#45;&gt;</span></span> <span><span><span class="type-var">'a</span> list</span> <span class="arrow">&#45;&gt;</span></span> <span><span>(<span><span class="type-var">'a</span> list</span> * <span><span class="type-var">'a</span> list</span>)</span> <a href="../Lwt/index.html#type-t">Lwt.t</a></span></span></code></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-partition_p"><a href="#val-partition_p" class="anchor"></a><code><span><span class="keyword">val</span> partition_p : <span><span>(<span><span class="type-var">'a</span> <span class="arrow">&#45;&gt;</span></span> <span>bool <a href="../Lwt/index.html#type-t">Lwt.t</a></span>)</span> <span class="arrow">&#45;&gt;</span></span> <span><span><span class="type-var">'a</span> list</span> <span class="arrow">&#45;&gt;</span></span> <span><span>(<span><span class="type-var">'a</span> list</span> * <span><span class="type-var">'a</span> list</span>)</span> <a href="../Lwt/index.html#type-t">Lwt.t</a></span></span></code></div></div></div></body></html>