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<html xmlns="http://www.w3.org/1999/xhtml"><head><title>Hashtbl (containers.Containers.Hashtbl)</title><link rel="stylesheet" href="../../../odoc.css"/><meta charset="utf-8"/><meta name="viewport" content="width=device-width,initial-scale=1.0"/><meta name="generator" content="doc-ock-html v1.0.0-1-g1fc9bf0"/></head><body><nav id="top"><a href="../index.html">Up</a> — <span class="package">package <a href="../../index.html">containers</a></span></nav><header><h1><span class="keyword">Module</span> <span class="module-path">Containers.Hashtbl</span></h1></header><div class="doc"><ul class="at-tag"><li><span class="at-tag since">Since</span>: 0.14</li></ul></div><div class="spec include"><div class="doc"></div><details open="open"><summary><span class="def"><code><span class="keyword">include </span><span class="keyword">module type of </span>Hashtbl<span class="keyword"> with </span><span class="keyword">type </span><a href="../index.html#module-Hashtbl">Hashtbl</a>.statistics<span class="keyword"> = </span>Hashtbl.statistics<span class="keyword"> and </span><span class="keyword">module </span><a href="../index.html#module-Hashtbl">Hashtbl</a>.Make = Hashtbl.Make<span class="keyword"> and </span><span class="keyword">type </span>('a, 'b) <a href="../index.html#module-Hashtbl">Hashtbl</a>.t<span class="keyword"> = </span>(<span class="type-var">'a</span>, <span class="type-var">'b</span>) Hashtbl.t</code></span></summary><div class="spec type" id="type-t"><a href="#type-t" class="anchor"></a><div class="def type"><code><span class="keyword">type </span>('a, 'b) t</code><code><span class="keyword"> = </span>(<span class="type-var">'a</span>, <span class="type-var">'b</span>) Hashtbl.t</code><code></code></div><div class="doc"></div></div><div class="spec val" id="val-create"><a href="#val-create" class="anchor"></a><div class="def val"><code><span class="keyword">val </span>create : ?⁠random:bool <span class="keyword">‑></span> int <span class="keyword">‑></span> (<span class="type-var">'a</span>, <span class="type-var">'b</span>) <a href="index.html#type-t">t</a></code></div><div class="doc"></div></div><div class="spec val" id="val-clear"><a href="#val-clear" class="anchor"></a><div class="def val"><code><span class="keyword">val </span>clear : (<span class="type-var">'a</span>, <span class="type-var">'b</span>) <a href="index.html#type-t">t</a> <span class="keyword">‑></span> unit</code></div><div class="doc"></div></div><div class="spec val" id="val-reset"><a href="#val-reset" class="anchor"></a><div class="def val"><code><span class="keyword">val </span>reset : (<span class="type-var">'a</span>, <span class="type-var">'b</span>) <a href="index.html#type-t">t</a> <span class="keyword">‑></span> unit</code></div><div class="doc"></div></div><div class="spec val" id="val-copy"><a href="#val-copy" class="anchor"></a><div class="def val"><code><span class="keyword">val </span>copy : (<span class="type-var">'a</span>, <span class="type-var">'b</span>) <a href="index.html#type-t">t</a> <span class="keyword">‑></span> (<span class="type-var">'a</span>, <span class="type-var">'b</span>) <a href="index.html#type-t">t</a></code></div><div class="doc"></div></div><div class="spec val" id="val-add"><a href="#val-add" class="anchor"></a><div class="def val"><code><span class="keyword">val </span>add : (<span class="type-var">'a</span>, <span class="type-var">'b</span>) <a href="index.html#type-t">t</a> <span class="keyword">‑></span> <span class="type-var">'a</span> <span class="keyword">‑></span> <span class="type-var">'b</span> <span class="keyword">‑></span> unit</code></div><div class="doc"></div></div><div class="spec val" id="val-find"><a href="#val-find" class="anchor"></a><div class="def val"><code><span class="keyword">val </span>find : (<span class="type-var">'a</span>, <span class="type-var">'b</span>) <a href="index.html#type-t">t</a> <span class="keyword">‑></span> <span class="type-var">'a</span> <span class="keyword">‑></span> <span class="type-var">'b</span></code></div><div class="doc"></div></div><div class="spec val" id="val-find_opt"><a href="#val-find_opt" class="anchor"></a><div class="def val"><code><span class="keyword">val </span>find_opt : (<span class="type-var">'a</span>, <span class="type-var">'b</span>) <a href="index.html#type-t">t</a> <span class="keyword">‑></span> <span class="type-var">'a</span> <span class="keyword">‑></span> <span class="type-var">'b</span> option</code></div><div class="doc"></div></div><div class="spec val" id="val-find_all"><a href="#val-find_all" class="anchor"></a><div class="def val"><code><span class="keyword">val </span>find_all : (<span class="type-var">'a</span>, <span class="type-var">'b</span>) <a href="index.html#type-t">t</a> <span class="keyword">‑></span> <span class="type-var">'a</span> <span class="keyword">‑></span> <span class="type-var">'b</span> list</code></div><div class="doc"></div></div><div class="spec val" id="val-mem"><a href="#val-mem" class="anchor"></a><div class="def val"><code><span class="keyword">val </span>mem : (<span class="type-var">'a</span>, <span class="type-var">'b</span>) <a href="index.html#type-t">t</a> <span class="keyword">‑></span> <span class="type-var">'a</span> <span class="keyword">‑></span> bool</code></div><div class="doc"></div></div><div class="spec val" id="val-remove"><a href="#val-remove" class="anchor"></a><div class="def val"><code><span class="keyword">val </span>remove : (<span class="type-var">'a</span>, <span class="type-var">'b</span>) <a href="index.html#type-t">t</a> <span class="keyword">‑></span> <span class="type-var">'a</span> <span class="keyword">‑></span> unit</code></div><div class="doc"></div></div><div class="spec val" id="val-replace"><a href="#val-replace" class="anchor"></a><div class="def val"><code><span class="keyword">val </span>replace : (<span class="type-var">'a</span>, <span class="type-var">'b</span>) <a href="index.html#type-t">t</a> <span class="keyword">‑></span> <span class="type-var">'a</span> <span class="keyword">‑></span> <span class="type-var">'b</span> <span class="keyword">‑></span> unit</code></div><div class="doc"></div></div><div class="spec val" id="val-iter"><a href="#val-iter" class="anchor"></a><div class="def val"><code><span class="keyword">val </span>iter : (<span class="type-var">'a</span> <span class="keyword">‑></span> <span class="type-var">'b</span> <span class="keyword">‑></span> unit) <span class="keyword">‑></span> (<span class="type-var">'a</span>, <span class="type-var">'b</span>) <a href="index.html#type-t">t</a> <span class="keyword">‑></span> unit</code></div><div class="doc"></div></div><div class="spec val" id="val-filter_map_inplace"><a href="#val-filter_map_inplace" class="anchor"></a><div class="def val"><code><span class="keyword">val </span>filter_map_inplace : (<span class="type-var">'a</span> <span class="keyword">‑></span> <span class="type-var">'b</span> <span class="keyword">‑></span> <span class="type-var">'b</span> option) <span class="keyword">‑></span> (<span class="type-var">'a</span>, <span class="type-var">'b</span>) <a href="index.html#type-t">t</a> <span class="keyword">‑></span> unit</code></div><div class="doc"></div></div><div class="spec val" id="val-fold"><a href="#val-fold" class="anchor"></a><div class="def val"><code><span class="keyword">val </span>fold : (<span class="type-var">'a</span> <span class="keyword">‑></span> <span class="type-var">'b</span> <span class="keyword">‑></span> <span class="type-var">'c</span> <span class="keyword">‑></span> <span class="type-var">'c</span>) <span class="keyword">‑></span> (<span class="type-var">'a</span>, <span class="type-var">'b</span>) <a href="index.html#type-t">t</a> <span class="keyword">‑></span> <span class="type-var">'c</span> <span class="keyword">‑></span> <span class="type-var">'c</span></code></div><div class="doc"></div></div><div class="spec val" id="val-length"><a href="#val-length" class="anchor"></a><div class="def val"><code><span class="keyword">val </span>length : (<span class="type-var">'a</span>, <span class="type-var">'b</span>) <a href="index.html#type-t">t</a> <span class="keyword">‑></span> int</code></div><div class="doc"></div></div><div class="spec val" id="val-randomize"><a href="#val-randomize" class="anchor"></a><div class="def val"><code><span class="keyword">val </span>randomize : unit <span class="keyword">‑></span> unit</code></div><div class="doc"></div></div><div class="spec val" id="val-is_randomized"><a href="#val-is_randomized" class="anchor"></a><div class="def val"><code><span class="keyword">val </span>is_randomized : unit <span class="keyword">‑></span> bool</code></div><div class="doc"></div></div><div class="spec type" id="type-statistics"><a href="#type-statistics" class="anchor"></a><div class="def type"><code><span class="keyword">type </span>statistics</code><code><span class="keyword"> = </span>Hashtbl.statistics</code><code><span class="keyword"> = </span></code><code>{</code><table class="record"><tr id="type-statistics.num_bindings" class="anchored"><td class="def field"><a href="#type-statistics.num_bindings" class="anchor"></a><code>num_bindings : int;</code></td></tr><tr id="type-statistics.num_buckets" class="anchored"><td class="def field"><a href="#type-statistics.num_buckets" class="anchor"></a><code>num_buckets : int;</code></td></tr><tr id="type-statistics.max_bucket_length" class="anchored"><td class="def field"><a href="#type-statistics.max_bucket_length" class="anchor"></a><code>max_bucket_length : int;</code></td></tr><tr id="type-statistics.bucket_histogram" class="anchored"><td class="def field"><a href="#type-statistics.bucket_histogram" class="anchor"></a><code>bucket_histogram : int array;</code></td></tr></table><code>}</code><code></code></div><div class="doc"></div></div><div class="spec val" id="val-stats"><a href="#val-stats" class="anchor"></a><div class="def val"><code><span class="keyword">val </span>stats : (<span class="type-var">'a</span>, <span class="type-var">'b</span>) <a href="index.html#type-t">t</a> <span class="keyword">‑></span> <a href="index.html#type-statistics">statistics</a></code></div><div class="doc"></div></div><div class="spec module-type" id="module-type-HashedType"><a href="#module-type-HashedType" class="anchor"></a><div class="def module-type"><code><span class="keyword">module type </span><a href="module-type-HashedType/index.html">HashedType</a> : <span class="keyword">sig</span> ... <span class="keyword">end</span></code></div><div class="doc"></div></div><div class="spec module-type" id="module-type-S"><a href="#module-type-S" class="anchor"></a><div class="def module-type"><code><span class="keyword">module type </span><a href="module-type-S/index.html">S</a> : <span class="keyword">sig</span> ... <span class="keyword">end</span></code></div><div class="doc"></div></div><div class="spec module" id="module-Make"><a href="#module-Make" class="anchor"></a><div class="def module"><code><span class="keyword">module </span><a href="Make/index.html">Make</a> : <span class="keyword">functor</span> (<a href="Make/index.html#argument-1-H">H</a> : Hashtbl.HashedType) -> <span class="keyword">sig</span> ... <span class="keyword">end</span></code></div><div class="doc"></div></div><div class="spec module-type" id="module-type-SeededHashedType"><a href="#module-type-SeededHashedType" class="anchor"></a><div class="def module-type"><code><span class="keyword">module type </span><a href="module-type-SeededHashedType/index.html">SeededHashedType</a> : <span class="keyword">sig</span> ... <span class="keyword">end</span></code></div><div class="doc"></div></div><div class="spec module-type" id="module-type-SeededS"><a href="#module-type-SeededS" class="anchor"></a><div class="def module-type"><code><span class="keyword">module type </span><a href="module-type-SeededS/index.html">SeededS</a> : <span class="keyword">sig</span> ... <span class="keyword">end</span></code></div><div class="doc"></div></div><div class="spec module" id="module-MakeSeeded"><a href="#module-MakeSeeded" class="anchor"></a><div class="def module"><code><span class="keyword">module </span><a href="MakeSeeded/index.html">MakeSeeded</a> : <span class="keyword">functor</span> (<a href="MakeSeeded/argument-1-H/index.html">H</a> : <a href="index.html#module-type-SeededHashedType">SeededHashedType</a>) -> <span class="keyword">sig</span> ... <span class="keyword">end</span></code></div><div class="doc"></div></div><div class="spec val" id="val-hash"><a href="#val-hash" class="anchor"></a><div class="def val"><code><span class="keyword">val </span>hash : <span class="type-var">'a</span> <span class="keyword">‑></span> int</code></div><div class="doc"></div></div><div class="spec val" id="val-seeded_hash"><a href="#val-seeded_hash" class="anchor"></a><div class="def val"><code><span class="keyword">val </span>seeded_hash : int <span class="keyword">‑></span> <span class="type-var">'a</span> <span class="keyword">‑></span> int</code></div><div class="doc"></div></div><div class="spec val" id="val-hash_param"><a href="#val-hash_param" class="anchor"></a><div class="def val"><code><span class="keyword">val </span>hash_param : int <span class="keyword">‑></span> int <span class="keyword">‑></span> <span class="type-var">'a</span> <span class="keyword">‑></span> int</code></div><div class="doc"></div></div><div class="spec val" id="val-seeded_hash_param"><a href="#val-seeded_hash_param" class="anchor"></a><div class="def val"><code><span class="keyword">val </span>seeded_hash_param : int <span class="keyword">‑></span> int <span class="keyword">‑></span> int <span class="keyword">‑></span> <span class="type-var">'a</span> <span class="keyword">‑></span> int</code></div><div class="doc"></div></div></details></div><div class="spec include"><div class="doc"></div><details open="open"><summary><span class="def"><code><span class="keyword">include </span><a href="../../CCHashtbl/index.html#module-Poly">CCHashtbl.Poly</a></code></span></summary><div class="spec val" id="val-get"><a href="#val-get" class="anchor"></a><div class="def val"><code><span class="keyword">val </span>get : (<span class="type-var">'a</span>, <span class="type-var">'b</span>) Hashtbl.t <span class="keyword">‑></span> <span class="type-var">'a</span> <span class="keyword">‑></span> <span class="type-var">'b</span> option</code></div><div class="doc"><p>Safe version of <span class="xref-unresolved" title="unresolved reference to "Hashtbl.find""><a href="../index.html#module-Hashtbl">Hashtbl</a>.find</span>.</p></div></div><div class="spec val" id="val-get_or"><a href="#val-get_or" class="anchor"></a><div class="def val"><code><span class="keyword">val </span>get_or : (<span class="type-var">'a</span>, <span class="type-var">'b</span>) Hashtbl.t <span class="keyword">‑></span> <span class="type-var">'a</span> <span class="keyword">‑></span> default:<span class="type-var">'b</span> <span class="keyword">‑></span> <span class="type-var">'b</span></code></div><div class="doc"><p><code class="code">get_or tbl k ~default</code> returns the value associated to <code class="code">k</code> if present,
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and returns <code class="code">default</code> otherwise (if <code class="code">k</code> doesn't belong in <code class="code">tbl</code>).</p><ul class="at-tag"><li><span class="at-tag since">Since</span>: 0.16</li></ul></div></div><div class="spec val" id="val-keys"><a href="#val-keys" class="anchor"></a><div class="def val"><code><span class="keyword">val </span>keys : (<span class="type-var">'a</span>, <span class="type-var">'b</span>) Hashtbl.t <span class="keyword">‑></span> <span class="type-var">'a</span> <a href="../../CCHashtbl/index.html#type-sequence">CCHashtbl.sequence</a></code></div><div class="doc"><p>Iterate on keys (similar order as <span class="xref-unresolved" title="unresolved reference to "Hashtbl.iter""><a href="../index.html#module-Hashtbl">Hashtbl</a>.iter</span>).</p></div></div><div class="spec val" id="val-values"><a href="#val-values" class="anchor"></a><div class="def val"><code><span class="keyword">val </span>values : (<span class="type-var">'a</span>, <span class="type-var">'b</span>) Hashtbl.t <span class="keyword">‑></span> <span class="type-var">'b</span> <a href="../../CCHashtbl/index.html#type-sequence">CCHashtbl.sequence</a></code></div><div class="doc"><p>Iterate on values in the table.</p></div></div><div class="spec val" id="val-keys_list"><a href="#val-keys_list" class="anchor"></a><div class="def val"><code><span class="keyword">val </span>keys_list : (<span class="type-var">'a</span>, <span class="type-var">'b</span>) Hashtbl.t <span class="keyword">‑></span> <span class="type-var">'a</span> list</code></div><div class="doc"><p><code class="code">keys_list t</code> is the list of keys in <code class="code">t</code>.
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If the key is in the Hashtable multiple times, all occurrences will be returned.</p><ul class="at-tag"><li><span class="at-tag since">Since</span>: 0.8</li></ul></div></div><div class="spec val" id="val-values_list"><a href="#val-values_list" class="anchor"></a><div class="def val"><code><span class="keyword">val </span>values_list : (<span class="type-var">'a</span>, <span class="type-var">'b</span>) Hashtbl.t <span class="keyword">‑></span> <span class="type-var">'b</span> list</code></div><div class="doc"><p><code class="code">values_list t</code> is the list of values in <code class="code">t</code>.</p><ul class="at-tag"><li><span class="at-tag since">Since</span>: 0.8</li></ul></div></div><div class="spec val" id="val-map_list"><a href="#val-map_list" class="anchor"></a><div class="def val"><code><span class="keyword">val </span>map_list : (<span class="type-var">'a</span> <span class="keyword">‑></span> <span class="type-var">'b</span> <span class="keyword">‑></span> <span class="type-var">'c</span>) <span class="keyword">‑></span> (<span class="type-var">'a</span>, <span class="type-var">'b</span>) Hashtbl.t <span class="keyword">‑></span> <span class="type-var">'c</span> list</code></div><div class="doc"><p>Map on a hashtable's items, collect into a list.</p></div></div><div class="spec val" id="val-incr"><a href="#val-incr" class="anchor"></a><div class="def val"><code><span class="keyword">val </span>incr : ?⁠by:int <span class="keyword">‑></span> (<span class="type-var">'a</span>, int) Hashtbl.t <span class="keyword">‑></span> <span class="type-var">'a</span> <span class="keyword">‑></span> unit</code></div><div class="doc"><p><code class="code">incr ?by tbl x</code> increments or initializes the counter associated with <code class="code">x</code>.
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If <code class="code">get tbl x = None</code>, then after update, <code class="code">get tbl x = Some 1</code>;
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otherwise, if <code class="code">get tbl x = Some n</code>, now <code class="code">get tbl x = Some (n+1)</code>.</p><ul class="at-tag"><li><span class="at-tag parameter">Parameter</span> <span class="module-path">by</span>: if specified, the int value is incremented by <code class="code">by</code> rather than 1.</li><li><span class="at-tag since">Since</span>: 0.16</li></ul></div></div><div class="spec val" id="val-decr"><a href="#val-decr" class="anchor"></a><div class="def val"><code><span class="keyword">val </span>decr : ?⁠by:int <span class="keyword">‑></span> (<span class="type-var">'a</span>, int) Hashtbl.t <span class="keyword">‑></span> <span class="type-var">'a</span> <span class="keyword">‑></span> unit</code></div><div class="doc"><p>Like <a href="index.html#val-incr">incr</a> but subtract 1 (or the value of <code class="code">by</code>).
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If the value reaches 0, the key is removed from the table.
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This does nothing if the key is not already present in the table.</p><ul class="at-tag"><li><span class="at-tag since">Since</span>: 0.16</li></ul></div></div><div class="spec val" id="val-to_seq"><a href="#val-to_seq" class="anchor"></a><div class="def val"><code><span class="keyword">val </span>to_seq : (<span class="type-var">'a</span>, <span class="type-var">'b</span>) Hashtbl.t <span class="keyword">‑></span> (<span class="type-var">'a</span><span class="keyword"> * </span><span class="type-var">'b</span>) <a href="../../CCHashtbl/index.html#type-sequence">CCHashtbl.sequence</a></code></div><div class="doc"><p>Iterate on bindings in the table.</p></div></div><div class="spec val" id="val-add_list"><a href="#val-add_list" class="anchor"></a><div class="def val"><code><span class="keyword">val </span>add_list : (<span class="type-var">'a</span>, <span class="type-var">'b</span> list) Hashtbl.t <span class="keyword">‑></span> <span class="type-var">'a</span> <span class="keyword">‑></span> <span class="type-var">'b</span> <span class="keyword">‑></span> unit</code></div><div class="doc"><p><code class="code">add_list tbl x y</code> adds <code class="code">y</code> to the list <code class="code">x</code> is bound to. If <code class="code">x</code> is
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not bound, it becomes bound to <code class="code">y</code>.</p><ul class="at-tag"><li><span class="at-tag since">Since</span>: 0.16</li></ul></div></div><div class="spec val" id="val-add_seq"><a href="#val-add_seq" class="anchor"></a><div class="def val"><code><span class="keyword">val </span>add_seq : (<span class="type-var">'a</span>, <span class="type-var">'b</span>) Hashtbl.t <span class="keyword">‑></span> (<span class="type-var">'a</span><span class="keyword"> * </span><span class="type-var">'b</span>) <a href="../../CCHashtbl/index.html#type-sequence">CCHashtbl.sequence</a> <span class="keyword">‑></span> unit</code></div><div class="doc"><p>Add the corresponding pairs to the table, using <span class="xref-unresolved" title="unresolved reference to "Hashtbl.add""><a href="../index.html#module-Hashtbl">Hashtbl</a>.add</span>.</p><ul class="at-tag"><li><span class="at-tag since">Since</span>: 0.16</li></ul></div></div><div class="spec val" id="val-of_seq"><a href="#val-of_seq" class="anchor"></a><div class="def val"><code><span class="keyword">val </span>of_seq : (<span class="type-var">'a</span><span class="keyword"> * </span><span class="type-var">'b</span>) <a href="../../CCHashtbl/index.html#type-sequence">CCHashtbl.sequence</a> <span class="keyword">‑></span> (<span class="type-var">'a</span>, <span class="type-var">'b</span>) Hashtbl.t</code></div><div class="doc"><p>From the given bindings, added in order.</p></div></div><div class="spec val" id="val-add_seq_count"><a href="#val-add_seq_count" class="anchor"></a><div class="def val"><code><span class="keyword">val </span>add_seq_count : (<span class="type-var">'a</span>, int) Hashtbl.t <span class="keyword">‑></span> <span class="type-var">'a</span> <a href="../../CCHashtbl/index.html#type-sequence">CCHashtbl.sequence</a> <span class="keyword">‑></span> unit</code></div><div class="doc"><p><code class="code">add_seq_count tbl seq</code> increments the count of each element of <code class="code">seq</code>
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by calling <a href="index.html#val-incr">incr</a>. This is useful for counting how many times each
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element of <code class="code">seq</code> occurs.</p><ul class="at-tag"><li><span class="at-tag since">Since</span>: 0.16</li></ul></div></div><div class="spec val" id="val-of_seq_count"><a href="#val-of_seq_count" class="anchor"></a><div class="def val"><code><span class="keyword">val </span>of_seq_count : <span class="type-var">'a</span> <a href="../../CCHashtbl/index.html#type-sequence">CCHashtbl.sequence</a> <span class="keyword">‑></span> (<span class="type-var">'a</span>, int) Hashtbl.t</code></div><div class="doc"><p>Like <a href="index.html#val-add_seq_count">add_seq_count</a>, but allocates a new table and returns it.</p><ul class="at-tag"><li><span class="at-tag since">Since</span>: 0.16</li></ul></div></div><div class="spec val" id="val-to_list"><a href="#val-to_list" class="anchor"></a><div class="def val"><code><span class="keyword">val </span>to_list : (<span class="type-var">'a</span>, <span class="type-var">'b</span>) Hashtbl.t <span class="keyword">‑></span> (<span class="type-var">'a</span><span class="keyword"> * </span><span class="type-var">'b</span>) list</code></div><div class="doc"><p>List of bindings (order unspecified).</p></div></div><div class="spec val" id="val-of_list"><a href="#val-of_list" class="anchor"></a><div class="def val"><code><span class="keyword">val </span>of_list : (<span class="type-var">'a</span><span class="keyword"> * </span><span class="type-var">'b</span>) list <span class="keyword">‑></span> (<span class="type-var">'a</span>, <span class="type-var">'b</span>) Hashtbl.t</code></div><div class="doc"><p>Build a table from the given list of bindings <code class="code">k_i -> v_i</code>,
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added in order using <a href="index.html#val-add">add</a>. If a key occurs several times,
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it will be added several times, and the visible binding
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will be the last one.</p></div></div><div class="spec val" id="val-update"><a href="#val-update" class="anchor"></a><div class="def val"><code><span class="keyword">val </span>update : (<span class="type-var">'a</span>, <span class="type-var">'b</span>) Hashtbl.t <span class="keyword">‑></span> f:(<span class="type-var">'a</span> <span class="keyword">‑></span> <span class="type-var">'b</span> option <span class="keyword">‑></span> <span class="type-var">'b</span> option) <span class="keyword">‑></span> k:<span class="type-var">'a</span> <span class="keyword">‑></span> unit</code></div><div class="doc"><p><code class="code">update tbl ~f ~k</code> updates key <code class="code">k</code> by calling <code class="code">f k (Some v)</code> if
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<code class="code">k</code> was mapped to <code class="code">v</code>, or <code class="code">f k None</code> otherwise; if the call
|
||
returns <code class="code">None</code> then <code class="code">k</code> is removed/stays removed, if the call
|
||
returns <code class="code">Some v'</code> then the binding <code class="code">k -> v'</code> is inserted
|
||
using <span class="xref-unresolved" title="unresolved reference to "Hashtbl.replace""><a href="../index.html#module-Hashtbl">Hashtbl</a>.replace</span>.</p><ul class="at-tag"><li><span class="at-tag since">Since</span>: 0.14</li></ul></div></div><div class="spec val" id="val-get_or_add"><a href="#val-get_or_add" class="anchor"></a><div class="def val"><code><span class="keyword">val </span>get_or_add : (<span class="type-var">'a</span>, <span class="type-var">'b</span>) Hashtbl.t <span class="keyword">‑></span> f:(<span class="type-var">'a</span> <span class="keyword">‑></span> <span class="type-var">'b</span>) <span class="keyword">‑></span> k:<span class="type-var">'a</span> <span class="keyword">‑></span> <span class="type-var">'b</span></code></div><div class="doc"><p><code class="code">get_or_add tbl ~k ~f</code> finds and returns the binding of <code class="code">k</code>
|
||
in <code class="code">tbl</code>, if it exists. If it does not exist, then <code class="code">f k</code>
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||
is called to obtain a new binding <code class="code">v</code>; <code class="code">k -> v</code> is added
|
||
to <code class="code">tbl</code> and <code class="code">v</code> is returned.</p><ul class="at-tag"><li><span class="at-tag since">Since</span>: 1.0</li></ul></div></div><div class="spec val" id="val-pp"><a href="#val-pp" class="anchor"></a><div class="def val"><code><span class="keyword">val </span>pp : <span class="type-var">'a</span> <a href="../../CCHashtbl/index.html#type-printer">CCHashtbl.printer</a> <span class="keyword">‑></span> <span class="type-var">'b</span> <a href="../../CCHashtbl/index.html#type-printer">CCHashtbl.printer</a> <span class="keyword">‑></span> (<span class="type-var">'a</span>, <span class="type-var">'b</span>) Hashtbl.t <a href="../../CCHashtbl/index.html#type-printer">CCHashtbl.printer</a></code></div><div class="doc"><p>Printer for table.
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||
Renamed from <code class="code">print</code> since 2.0.</p><ul class="at-tag"><li><span class="at-tag since">Since</span>: 0.13</li></ul></div></div></details></div><div class="spec module-type" id="module-type-S'"><a href="#module-type-S'" class="anchor"></a><div class="def module-type"><code><span class="keyword">module type </span><a href="module-type-S'/index.html">S'</a> = <a href="../../CCHashtbl/index.html#module-type-S">CCHashtbl.S</a></code></div><div class="doc"></div></div><div class="spec module" id="module-Make'"><a href="#module-Make'" class="anchor"></a><div class="def module"><code><span class="keyword">module </span>Make' = <a href="../../CCHashtbl/index.html#module-Make">CCHashtbl.Make</a></code></div><div class="doc"></div></div></body></html> |