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<!doctype html>
<html>
<head>
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<title> Belt.Map </title></head>
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<nav class="module-index"><ul><li><a href="Belt.html">Belt</a></li>
<li><a href="Belt_Array.html">Belt_Array</a></li>
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<li><a href="Belt_HashMap.html">Belt_HashMap</a></li>
<li><a href="Belt_HashMapInt.html">Belt_HashMapInt</a></li>
<li><a href="Belt_HashMapString.html">Belt_HashMapString</a></li>
<li><a href="Belt_HashSet.html">Belt_HashSet</a></li>
<li><a href="Belt_HashSetInt.html">Belt_HashSetInt</a></li>
<li><a href="Belt_HashSetString.html">Belt_HashSetString</a></li>
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<h1>Module <a href="type_Belt.Map.html">Belt.Map</a></h1>
<pre><span class="keyword">module</span> Map: <code class="type"><a href="Belt_Map.html">Belt_Map</a></code></pre><div class="info module top">
<div class="not-examples">
<a href="Belt.Map.html"><code class="code">Belt.Map</code></a>,
<p>
The top level provides generic <b>immutable</b> map operations.
<p>
It also has three specialized inner modules
<code class="code">Belt.Map.Int</code>, <code class="code">Belt.Map.String</code> and
<p>
<code class="code">Belt.Map.Dict</code>: This module separates data from function
which is more verbose but slightly more efficient<br>
</div>
</div>
<hr width="100%">
<pre><span class="keyword">module</span> <a href="Belt_Map.Int.html">Int</a>: <code class="type"><a href="Belt_MapInt.html">Belt_MapInt</a></code></pre> <div class="info">
<div class="not-examples">
Specalized when key type is <code class="code">int</code>, more efficient
than the generic type, its compare behavior is fixed using the built-in comparison<br>
</div>
</div>
<pre><span class="keyword">module</span> <a href="Belt_Map.String.html">String</a>: <code class="type"><a href="Belt_MapString.html">Belt_MapString</a></code></pre> <div class="info">
<div class="not-examples">
specalized when key type is <code class="code">string</code>, more efficient
than the generic type, its compare behavior is fixed using the built-in comparison<br>
</div>
</div>
<pre><span class="keyword">module</span> <a href="Belt_Map.Dict.html">Dict</a>: <code class="type"><a href="Belt_MapDict.html">Belt_MapDict</a></code></pre> <div class="info">
<div class="not-examples">
This module seprate identity from data, it is a bit more verboe but slightly
more efficient due to the fact that there is no need to pack identity and data back
after each operation
<p>
<b>Advanced usage only</b><br>
</div>
</div> <div class="type-declaration">
<pre><span id="TYPEt"><span class="keyword">type</span> <code class="type">('key, 'value, 'identity)</code> t</span> </pre>
</div>
<div class="info ">
<div class="not-examples">
<code class="code">('key, 'identity) t</code>
<p>
<code class="code">'key</code> is the field type
<p>
<code class="code">'value</code> is the element type
<p>
<code class="code">'identity</code> the identity of the collection<br>
</div>
</div>
<div class="type-declaration">
<pre><span id="TYPEid"><span class="keyword">type</span> <code class="type">('key, 'id)</code> id</span> = <code class="type">('key, 'id) <a href="Belt_Id.html#TYPEcomparable">Belt_Id.comparable</a></code> </pre>
</div>
<div class="info ">
<div class="not-examples">
The identity needed for making an empty map<br>
</div>
</div>
<pre><span id="VALmake"><span class="keyword">val</span> make</span> : <code class="type">id:('k, 'id) <a href="Belt_Map.html#TYPEid">id</a> -> ('k, 'v, 'id) <a href="Belt_Map.html#TYPEt">t</a></code></pre><div class="info ">
<div class="not-examples">
<code class="code">make ~id</code> creates a new map by taking in the comparator<br>
</div>
<div class="examples">
<pre class="example"> <pre class="codepre"><code class="code"> let m = Belt.Map.make ~id:(module IntCmp)
</code></pre> </pre>
</div>
</div>
<pre><span id="VALisEmpty"><span class="keyword">val</span> isEmpty</span> : <code class="type">('a, 'b, 'c) <a href="Belt_Map.html#TYPEt">t</a> -> bool</code></pre><div class="info ">
<div class="not-examples">
<code class="code">isEmpty m</code> checks whether a map m is empty<br>
</div>
<div class="examples">
<pre class="example"> <pre class="codepre"><code class="code"> isEmpty (fromArray [|1,"1"|] ~id:(module IntCmp)) = false
</code></pre> </pre>
</div>
</div>
<pre><span id="VALhas"><span class="keyword">val</span> has</span> : <code class="type">('k, 'v, 'id) <a href="Belt_Map.html#TYPEt">t</a> -> 'k -> bool</code></pre><div class="info ">
<div class="not-examples">
<code class="code">has m k</code> checks whether m has the key k<br>
</div>
<div class="examples">
<pre class="example"> <pre class="codepre"><code class="code"> has (fromArray [|1,"1"|] ~id:(module IntCmp)) 1 = true
</code></pre> </pre>
</div>
</div>
<pre><span id="VALcmpU"><span class="keyword">val</span> cmpU</span> : <code class="type">('k, 'v, 'id) <a href="Belt_Map.html#TYPEt">t</a> -><br> ('k, 'v, 'id) <a href="Belt_Map.html#TYPEt">t</a> -> ('v -> 'v -> int [@bs]) -> int</code></pre>
<pre><span id="VALcmp"><span class="keyword">val</span> cmp</span> : <code class="type">('k, 'v, 'id) <a href="Belt_Map.html#TYPEt">t</a> -><br> ('k, 'v, 'id) <a href="Belt_Map.html#TYPEt">t</a> -> ('v -> 'v -> int) -> int</code></pre><div class="info ">
<div class="not-examples">
<code class="code">cmp m0 m1 vcmp</code>
<p>
Total ordering of map given total ordering of value function.
<p>
It will compare size first and each element following the order one by one.<br>
</div>
</div>
<pre><span id="VALeqU"><span class="keyword">val</span> eqU</span> : <code class="type">('k, 'v, 'id) <a href="Belt_Map.html#TYPEt">t</a> -><br> ('k, 'v, 'id) <a href="Belt_Map.html#TYPEt">t</a> -> ('v -> 'v -> bool [@bs]) -> bool</code></pre>
<pre><span id="VALeq"><span class="keyword">val</span> eq</span> : <code class="type">('k, 'v, 'id) <a href="Belt_Map.html#TYPEt">t</a> -><br> ('k, 'v, 'id) <a href="Belt_Map.html#TYPEt">t</a> -> ('v -> 'v -> bool) -> bool</code></pre><div class="info ">
<div class="not-examples">
<code class="code">eq m1 m2 veq</code> tests whether the maps <code class="code">m1</code> and <code class="code">m2</code> are
equal, that is, contain equal keys and associate them with
equal data. <code class="code">veq</code> is the equality predicate used to compare
the data associated with the keys.<br>
</div>
</div>
<pre><span id="VALfindFirstByU"><span class="keyword">val</span> findFirstByU</span> : <code class="type">('k, 'v, 'id) <a href="Belt_Map.html#TYPEt">t</a> -> ('k -> 'v -> bool [@bs]) -> ('k * 'v) option</code></pre>
<pre><span id="VALfindFirstBy"><span class="keyword">val</span> findFirstBy</span> : <code class="type">('k, 'v, 'id) <a href="Belt_Map.html#TYPEt">t</a> -> ('k -> 'v -> bool) -> ('k * 'v) option</code></pre><div class="info ">
<div class="not-examples">
<code class="code">findFirstBy m p</code> uses funcion <code class="code">f</code> to find the first key value pair
to match predicate <code class="code">p</code>.<br>
</div>
<div class="examples">
<pre class="example"> <pre class="codepre"><code class="code"> let s0 = fromArray ~id:(module IntCmp) [|4,"4";1,"1";2,"2,"3""|];;
findFirstBy s0 (fun k v -> k = 4 ) = option (4, "4");;
</code></pre> </pre>
</div>
</div>
<pre><span id="VALforEachU"><span class="keyword">val</span> forEachU</span> : <code class="type">('k, 'v, 'id) <a href="Belt_Map.html#TYPEt">t</a> -> ('k -> 'v -> unit [@bs]) -> unit</code></pre>
<pre><span id="VALforEach"><span class="keyword">val</span> forEach</span> : <code class="type">('k, 'v, 'id) <a href="Belt_Map.html#TYPEt">t</a> -> ('k -> 'v -> unit) -> unit</code></pre><div class="info ">
<div class="not-examples">
<code class="code">forEach m f</code> applies <code class="code">f</code> to all bindings in map <code class="code">m</code>.
<code class="code">f</code> receives the 'k as first argument, and the associated value
as second argument. The bindings are passed to <code class="code">f</code> in increasing
order with respect to the ordering over the type of the keys.<br>
</div>
<div class="examples">
<pre class="example"> <pre class="codepre"><code class="code"> let s0 = fromArray ~id:(module IntCmp) [|4,"4";1,"1";2,"2,"3""|];;
let acc = ref [] ;;
forEach s0 (fun k v -> acc := (k,v) :: !acc);;
!acc = [4,"4"; 3,"3"; 2,"2"; 1,"1"]
</code></pre> </pre>
</div>
</div>
<pre><span id="VALreduceU"><span class="keyword">val</span> reduceU</span> : <code class="type">('k, 'v, 'id) <a href="Belt_Map.html#TYPEt">t</a> -> 'acc -> ('acc -> 'k -> 'v -> 'acc [@bs]) -> 'acc</code></pre>
<pre><span id="VALreduce"><span class="keyword">val</span> reduce</span> : <code class="type">('k, 'v, 'id) <a href="Belt_Map.html#TYPEt">t</a> -> 'acc -> ('acc -> 'k -> 'v -> 'acc) -> 'acc</code></pre><div class="info ">
<div class="not-examples">
<code class="code">reduce m a f</code> computes <code class="code">(f kN dN ... (f k1 d1 a)...)</code>,
where <code class="code">k1 ... kN</code> are the keys of all bindings in <code class="code">m</code>
(in increasing order), and <code class="code">d1 ... dN</code> are the associated data.<br>
</div>
<div class="examples">
<pre class="example"> <pre class="codepre"><code class="code"> let s0 = fromArray ~id:(module IntCmp) [|4,"4";1,"1";2,"2,"3""|];;
reduce s0 [] (fun acc k v -> (k,v) acc ) = [4,"4";3,"3";2,"2";1,"1"];;
</code></pre> </pre>
</div>
</div>
<pre><span id="VALeveryU"><span class="keyword">val</span> everyU</span> : <code class="type">('k, 'v, 'id) <a href="Belt_Map.html#TYPEt">t</a> -> ('k -> 'v -> bool [@bs]) -> bool</code></pre>
<pre><span id="VALevery"><span class="keyword">val</span> every</span> : <code class="type">('k, 'v, 'id) <a href="Belt_Map.html#TYPEt">t</a> -> ('k -> 'v -> bool) -> bool</code></pre><div class="info ">
<div class="not-examples">
<code class="code">every m p</code> checks if all the bindings of the map
satisfy the predicate <code class="code">p</code>. Order unspecified<br>
</div>
</div>
<pre><span id="VALsomeU"><span class="keyword">val</span> someU</span> : <code class="type">('k, 'v, 'id) <a href="Belt_Map.html#TYPEt">t</a> -> ('k -> 'v -> bool [@bs]) -> bool</code></pre>
<pre><span id="VALsome"><span class="keyword">val</span> some</span> : <code class="type">('k, 'v, 'id) <a href="Belt_Map.html#TYPEt">t</a> -> ('k -> 'v -> bool) -> bool</code></pre><div class="info ">
<div class="not-examples">
<code class="code">some m p</code> checks if at least one binding of the map
satisfy the predicate <code class="code">p</code>. Order unspecified<br>
</div>
</div>
<pre><span id="VALsize"><span class="keyword">val</span> size</span> : <code class="type">('k, 'v, 'id) <a href="Belt_Map.html#TYPEt">t</a> -> int</code></pre><div class="info ">
<div class="not-examples">
<code class="code">size s</code><br>
</div>
<div class="examples">
<pre class="example"> <pre class="codepre"><code class="code"> size (fromArray [2,"2"; 2,"1"; 3,"3"] ~id:(module IntCmp)) = 2 ;;
</code></pre> </pre>
</div>
</div>
<pre><span id="VALtoArray"><span class="keyword">val</span> toArray</span> : <code class="type">('k, 'v, 'id) <a href="Belt_Map.html#TYPEt">t</a> -> ('k * 'v) array</code></pre><div class="info ">
<div class="not-examples">
<code class="code">toArray s</code><br>
</div>
<div class="examples">
<pre class="example"> <pre class="codepre"><code class="code"> toArray (fromArray [2,"2"; 1,"1"; 3,"3"] ~id:(module IntCmp)) = [1,"1";2,"2";3,"3"]
</code></pre> </pre>
</div>
</div>
<pre><span id="VALtoList"><span class="keyword">val</span> toList</span> : <code class="type">('k, 'v, 'id) <a href="Belt_Map.html#TYPEt">t</a> -> ('k * 'v) list</code></pre><div class="info ">
<div class="not-examples">
In increasing order
<p>
<b>See</b> <a href="Belt_Map.html#VALtoArray"><code class="code">Belt_Map.toArray</code></a><br>
</div>
</div>
<pre><span id="VALfromArray"><span class="keyword">val</span> fromArray</span> : <code class="type">('k * 'v) array -> id:('k, 'id) <a href="Belt_Map.html#TYPEid">id</a> -> ('k, 'v, 'id) <a href="Belt_Map.html#TYPEt">t</a></code></pre><div class="info ">
<div class="not-examples">
<code class="code">fromArray kvs ~id</code><br>
</div>
<div class="examples">
<pre class="example"> <pre class="codepre"><code class="code"> toArray (fromArray [2,"2"; 1,"1"; 3,"3"] ~id:(module IntCmp)) = [1,"1";2,"2";3,"3"]
</code></pre> </pre>
</div>
</div>
<pre><span id="VALkeysToArray"><span class="keyword">val</span> keysToArray</span> : <code class="type">('k, 'v, 'id) <a href="Belt_Map.html#TYPEt">t</a> -> 'k array</code></pre><div class="info ">
<div class="not-examples">
<code class="code">keysToArray s</code><br>
</div>
<div class="examples">
<pre class="example"> <pre class="codepre"><code class="code"> keysToArray (fromArray [2,"2"; 1,"1"; 3,"3"] ~id:(module IntCmp)) =
[|1;2;3|];;
</code></pre> </pre>
</div>
</div>
<pre><span id="VALvaluesToArray"><span class="keyword">val</span> valuesToArray</span> : <code class="type">('k, 'v, 'id) <a href="Belt_Map.html#TYPEt">t</a> -> 'v array</code></pre><div class="info ">
<div class="not-examples">
<code class="code">valuesToArray s</code><br>
</div>
<div class="examples">
<pre class="example"> <pre class="codepre"><code class="code"> valuesToArray (fromArray [2,"2"; 1,"1"; 3,"3"] ~id:(module IntCmp)) =
[|"1";"2";"3"|];;
</code></pre> </pre>
</div>
</div>
<pre><span id="VALminKey"><span class="keyword">val</span> minKey</span> : <code class="type">('k, 'a, 'b) <a href="Belt_Map.html#TYPEt">t</a> -> 'k option</code></pre><div class="info ">
<div class="not-examples">
<code class="code">minKey s</code><br>
<div class="tag"> <b>Returns</b> the minimum key, None if not exist<br>
</div>
</div>
</div>
<pre><span id="VALminKeyUndefined"><span class="keyword">val</span> minKeyUndefined</span> : <code class="type">('k, 'a, 'b) <a href="Belt_Map.html#TYPEt">t</a> -> 'k <a href="Js.html#TYPEundefined">Js.undefined</a></code></pre><div class="info ">
<div class="not-examples">
<b>See</b> <a href="Belt_Map.html#VALminKey"><code class="code">Belt_Map.minKey</code></a><br>
</div>
</div>
<pre><span id="VALmaxKey"><span class="keyword">val</span> maxKey</span> : <code class="type">('k, 'a, 'b) <a href="Belt_Map.html#TYPEt">t</a> -> 'k option</code></pre><div class="info ">
<div class="not-examples">
<code class="code">maxKey s</code><br>
<div class="tag"> <b>Returns</b> the maximum key, None if not exist<br>
</div>
</div>
</div>
<pre><span id="VALmaxKeyUndefined"><span class="keyword">val</span> maxKeyUndefined</span> : <code class="type">('k, 'a, 'b) <a href="Belt_Map.html#TYPEt">t</a> -> 'k <a href="Js.html#TYPEundefined">Js.undefined</a></code></pre><div class="info ">
<div class="not-examples">
<b>See</b> <a href="Belt_Map.html#VALmaxKey"><code class="code">Belt_Map.maxKey</code></a><br>
</div>
</div>
<pre><span id="VALminimum"><span class="keyword">val</span> minimum</span> : <code class="type">('k, 'v, 'a) <a href="Belt_Map.html#TYPEt">t</a> -> ('k * 'v) option</code></pre><div class="info ">
<div class="not-examples">
<code class="code">minimum s</code><br>
<div class="tag"> <b>Returns</b> the minimum key value pair, None if not exist<br>
</div>
</div>
</div>
<pre><span id="VALminUndefined"><span class="keyword">val</span> minUndefined</span> : <code class="type">('k, 'v, 'a) <a href="Belt_Map.html#TYPEt">t</a> -> ('k * 'v) <a href="Js.html#TYPEundefined">Js.undefined</a></code></pre><div class="info ">
<div class="not-examples">
<b>See</b> <a href="Belt_Map.html#VALminimum"><code class="code">Belt_Map.minimum</code></a><br>
</div>
</div>
<pre><span id="VALmaximum"><span class="keyword">val</span> maximum</span> : <code class="type">('k, 'v, 'a) <a href="Belt_Map.html#TYPEt">t</a> -> ('k * 'v) option</code></pre><div class="info ">
<div class="not-examples">
<code class="code">maximum s</code><br>
<div class="tag"> <b>Returns</b> the maximum key value pair, None if not exist<br>
</div>
</div>
</div>
<pre><span id="VALmaxUndefined"><span class="keyword">val</span> maxUndefined</span> : <code class="type">('k, 'v, 'a) <a href="Belt_Map.html#TYPEt">t</a> -> ('k * 'v) <a href="Js.html#TYPEundefined">Js.undefined</a></code></pre><div class="info ">
<div class="not-examples">
<b>See</b> <a href="Belt_Map.html#VALmaximum"><code class="code">Belt_Map.maximum</code></a><br>
</div>
</div>
<pre><span id="VALget"><span class="keyword">val</span> get</span> : <code class="type">('k, 'v, 'id) <a href="Belt_Map.html#TYPEt">t</a> -> 'k -> 'v option</code></pre><div class="info ">
<div class="not-examples">
<code class="code">get s k</code><br>
</div>
<div class="examples">
<pre class="example"> <pre class="codepre"><code class="code"> get (fromArray [2,"2"; 1,"1"; 3,"3"] ~id:(module IntCmp)) 2 =
Some "2";;
get (fromArray [2,"2"; 1,"1"; 3,"3"] ~id:(module IntCmp)) 2 =
None;;
</code></pre> </pre>
</div>
</div>
<pre><span id="VALgetUndefined"><span class="keyword">val</span> getUndefined</span> : <code class="type">('k, 'v, 'id) <a href="Belt_Map.html#TYPEt">t</a> -> 'k -> 'v <a href="Js.html#TYPEundefined">Js.undefined</a></code></pre><div class="info ">
<div class="not-examples">
<b>See</b> <a href="Belt_Map.html#VALget"><code class="code">Belt_Map.get</code></a><br>
<div class="tag"> <b>Returns</b> <code class="code">undefined</code> when not found<br>
</div>
</div>
</div>
<pre><span id="VALgetWithDefault"><span class="keyword">val</span> getWithDefault</span> : <code class="type">('k, 'v, 'id) <a href="Belt_Map.html#TYPEt">t</a> -> 'k -> 'v -> 'v</code></pre><div class="info ">
<div class="not-examples">
<code class="code">getWithDefault s k default</code>
<p>
<b>See</b> <a href="Belt_Map.html#VALget"><code class="code">Belt_Map.get</code></a><br>
<div class="tag"> <b>Returns</b> <code class="code">default</code> when <code class="code">k</code> is not found<br>
</div>
</div>
</div>
<pre><span id="VALgetExn"><span class="keyword">val</span> getExn</span> : <code class="type">('k, 'v, 'id) <a href="Belt_Map.html#TYPEt">t</a> -> 'k -> 'v</code></pre><div class="info ">
<div class="not-examples">
<code class="code">getExn s k</code>
<p>
<b>See</b> <a href="Belt_Map.html#VALgetExn"><code class="code">Belt_Map.getExn</code></a>
<p>
<b>raise</b> when <code class="code">k</code> not exist<br>
</div>
</div>
<pre><span id="VALremove"><span class="keyword">val</span> remove</span> : <code class="type">('k, 'v, 'id) <a href="Belt_Map.html#TYPEt">t</a> -> 'k -> ('k, 'v, 'id) <a href="Belt_Map.html#TYPEt">t</a></code></pre><div class="info ">
<div class="not-examples">
<code class="code">remove m x</code> when <code class="code">x</code> is not in <code class="code">m</code>, <code class="code">m</code> is returned reference unchanged.<br>
</div>
<div class="examples">
<pre class="example"> <pre class="codepre"><code class="code"> let s0 = (fromArray [2,"2"; 1,"1"; 3,"3"] ~id:(module IntCmp));;
let s1 = remove s0 1;;
let s2 = remove s1 1;;
s1 == s2 ;;
keysToArray s1 = [|2;3|];;
</code></pre> </pre>
</div>
</div>
<pre><span id="VALremoveMany"><span class="keyword">val</span> removeMany</span> : <code class="type">('k, 'v, 'id) <a href="Belt_Map.html#TYPEt">t</a> -> 'k array -> ('k, 'v, 'id) <a href="Belt_Map.html#TYPEt">t</a></code></pre><div class="info ">
<div class="not-examples">
<code class="code">removeMany s xs</code>
<p>
Removing each of <code class="code">xs</code> to <code class="code">s</code>, note unlike <a href="Belt_Map.html#VALremove"><code class="code">Belt_Map.remove</code></a>,
the reference of return value might be changed even if none in <code class="code">xs</code>
exists <code class="code">s</code><br>
</div>
</div>
<pre><span id="VALset"><span class="keyword">val</span> set</span> : <code class="type">('k, 'v, 'id) <a href="Belt_Map.html#TYPEt">t</a> -> 'k -> 'v -> ('k, 'v, 'id) <a href="Belt_Map.html#TYPEt">t</a></code></pre><div class="info ">
<div class="not-examples">
<code class="code">set m x y </code> returns a map containing the same bindings as
<code class="code">m</code>, with a new binding of <code class="code">x</code> to <code class="code">y</code>. If <code class="code">x</code> was already bound
in <code class="code">m</code>, its previous binding disappears.<br>
</div>
<div class="examples">
<pre class="example"> <pre class="codepre"><code class="code"> let s0 = (fromArray [2,"2"; 1,"1"; 3,"3"] ~id:(module IntCmp));;
let s1 = set s0 2 "3";;
valuesToArray s1 = ["1";"3";"3"];;
</code></pre> </pre>
</div>
</div>
<pre><span id="VALupdateU"><span class="keyword">val</span> updateU</span> : <code class="type">('k, 'v, 'id) <a href="Belt_Map.html#TYPEt">t</a> -><br> 'k -> ('v option -> 'v option [@bs]) -> ('k, 'v, 'id) <a href="Belt_Map.html#TYPEt">t</a></code></pre>
<pre><span id="VALupdate"><span class="keyword">val</span> update</span> : <code class="type">('k, 'v, 'id) <a href="Belt_Map.html#TYPEt">t</a> -><br> 'k -> ('v option -> 'v option) -> ('k, 'v, 'id) <a href="Belt_Map.html#TYPEt">t</a></code></pre><div class="info ">
<div class="not-examples">
<code class="code">update m x f</code> returns a map containing the same bindings as
<code class="code">m</code>, except for the binding of <code class="code">x</code>.
Depending on the value of
<code class="code">y</code> where <code class="code">y</code> is <code class="code">f (get x m)</code>, the binding of <code class="code">x</code> is
added, removed or updated. If <code class="code">y</code> is <code class="code">None</code>, the binding is
removed if it exists; otherwise, if <code class="code">y</code> is <code class="code">Some z</code> then <code class="code">x</code>
is associated to <code class="code">z</code> in the resulting map.<br>
</div>
</div>
<pre><span id="VALmergeMany"><span class="keyword">val</span> mergeMany</span> : <code class="type">('k, 'v, 'id) <a href="Belt_Map.html#TYPEt">t</a> -> ('k * 'v) array -> ('k, 'v, 'id) <a href="Belt_Map.html#TYPEt">t</a></code></pre><div class="info ">
<div class="not-examples">
<code class="code">mergeMany s xs</code>
<p>
Adding each of <code class="code">xs</code> to <code class="code">s</code>, note unlike <code class="code">add</code>,
the reference of return value might be changed even if all values in <code class="code">xs</code>
exist <code class="code">s</code><br>
</div>
</div>
<pre><span id="VALmergeU"><span class="keyword">val</span> mergeU</span> : <code class="type">('k, 'v, 'id) <a href="Belt_Map.html#TYPEt">t</a> -><br> ('k, 'v2, 'id) <a href="Belt_Map.html#TYPEt">t</a> -><br> ('k -> 'v option -> 'v2 option -> 'v3 option [@bs]) -><br> ('k, 'v3, 'id) <a href="Belt_Map.html#TYPEt">t</a></code></pre>
<pre><span id="VALmerge"><span class="keyword">val</span> merge</span> : <code class="type">('k, 'v, 'id) <a href="Belt_Map.html#TYPEt">t</a> -><br> ('k, 'v2, 'id) <a href="Belt_Map.html#TYPEt">t</a> -><br> ('k -> 'v option -> 'v2 option -> 'v3 option) -> ('k, 'v3, 'id) <a href="Belt_Map.html#TYPEt">t</a></code></pre><div class="info ">
<div class="not-examples">
<code class="code">merge m1 m2 f</code> computes a map whose keys is a subset of keys of <code class="code">m1</code>
and of <code class="code">m2</code>. The presence of each such binding, and the corresponding
value, is determined with the function <code class="code">f</code>.<br>
</div>
</div>
<pre><span id="VALkeepU"><span class="keyword">val</span> keepU</span> : <code class="type">('k, 'v, 'id) <a href="Belt_Map.html#TYPEt">t</a> -><br> ('k -> 'v -> bool [@bs]) -> ('k, 'v, 'id) <a href="Belt_Map.html#TYPEt">t</a></code></pre>
<pre><span id="VALkeep"><span class="keyword">val</span> keep</span> : <code class="type">('k, 'v, 'id) <a href="Belt_Map.html#TYPEt">t</a> -> ('k -> 'v -> bool) -> ('k, 'v, 'id) <a href="Belt_Map.html#TYPEt">t</a></code></pre><div class="info ">
<div class="not-examples">
<code class="code">keep m p</code> returns the map with all the bindings in <code class="code">m</code>
that satisfy predicate <code class="code">p</code>.<br>
</div>
</div>
<pre><span id="VALpartitionU"><span class="keyword">val</span> partitionU</span> : <code class="type">('k, 'v, 'id) <a href="Belt_Map.html#TYPEt">t</a> -><br> ('k -> 'v -> bool [@bs]) -><br> ('k, 'v, 'id) <a href="Belt_Map.html#TYPEt">t</a> * ('k, 'v, 'id) <a href="Belt_Map.html#TYPEt">t</a></code></pre>
<pre><span id="VALpartition"><span class="keyword">val</span> partition</span> : <code class="type">('k, 'v, 'id) <a href="Belt_Map.html#TYPEt">t</a> -><br> ('k -> 'v -> bool) -> ('k, 'v, 'id) <a href="Belt_Map.html#TYPEt">t</a> * ('k, 'v, 'id) <a href="Belt_Map.html#TYPEt">t</a></code></pre><div class="info ">
<div class="not-examples">
<code class="code">partition m p</code> returns a pair of maps <code class="code">(m1, m2)</code>, where
<code class="code">m1</code> contains all the bindings of <code class="code">s</code> that satisfy the
predicate <code class="code">p</code>, and <code class="code">m2</code> is the map with all the bindings of
<code class="code">s</code> that do not satisfy <code class="code">p</code>.<br>
</div>
</div>
<pre><span id="VALsplit"><span class="keyword">val</span> split</span> : <code class="type">('k, 'v, 'id) <a href="Belt_Map.html#TYPEt">t</a> -><br> 'k -> (('k, 'v, 'id) <a href="Belt_Map.html#TYPEt">t</a> * ('k, 'v, 'id) <a href="Belt_Map.html#TYPEt">t</a>) * 'v option</code></pre><div class="info ">
<div class="not-examples">
<code class="code">split x m</code> returns a tuple <code class="code">(l r), data</code>, where
<code class="code">l</code> is the map with all the bindings of <code class="code">m</code> whose 'k
is strictly less than <code class="code">x</code>;
<code class="code">r</code> is the map with all the bindings of <code class="code">m</code> whose 'k
is strictly greater than <code class="code">x</code>;
<code class="code">data</code> is <code class="code">None</code> if <code class="code">m</code> contains no binding for <code class="code">x</code>,
or <code class="code">Some v</code> if <code class="code">m</code> binds <code class="code">v</code> to <code class="code">x</code>.<br>
</div>
</div>
<pre><span id="VALmapU"><span class="keyword">val</span> mapU</span> : <code class="type">('k, 'v, 'id) <a href="Belt_Map.html#TYPEt">t</a> -> ('v -> 'v2 [@bs]) -> ('k, 'v2, 'id) <a href="Belt_Map.html#TYPEt">t</a></code></pre>
<pre><span id="VALmap"><span class="keyword">val</span> map</span> : <code class="type">('k, 'v, 'id) <a href="Belt_Map.html#TYPEt">t</a> -> ('v -> 'v2) -> ('k, 'v2, 'id) <a href="Belt_Map.html#TYPEt">t</a></code></pre><div class="info ">
<div class="not-examples">
<code class="code">map m f</code> returns a map with same domain as <code class="code">m</code>, where the
associated value <code class="code">a</code> of all bindings of <code class="code">m</code> has been
replaced by the result of the application of <code class="code">f</code> to <code class="code">a</code>.
The bindings are passed to <code class="code">f</code> in increasing order
with respect to the ordering over the type of the keys.<br>
</div>
</div>
<pre><span id="VALmapWithKeyU"><span class="keyword">val</span> mapWithKeyU</span> : <code class="type">('k, 'v, 'id) <a href="Belt_Map.html#TYPEt">t</a> -><br> ('k -> 'v -> 'v2 [@bs]) -> ('k, 'v2, 'id) <a href="Belt_Map.html#TYPEt">t</a></code></pre>
<pre><span id="VALmapWithKey"><span class="keyword">val</span> mapWithKey</span> : <code class="type">('k, 'v, 'id) <a href="Belt_Map.html#TYPEt">t</a> -> ('k -> 'v -> 'v2) -> ('k, 'v2, 'id) <a href="Belt_Map.html#TYPEt">t</a></code></pre><div class="info ">
<div class="not-examples">
<code class="code">mapWithKey m f</code>
<p>
The same as <a href="Belt_Map.html#VALmap"><code class="code">Belt_Map.map</code></a> except that <code class="code">f</code> is supplied with one more argument: the key<br>
</div>
</div>
<pre><span id="VALgetData"><span class="keyword">val</span> getData</span> : <code class="type">('k, 'v, 'id) <a href="Belt_Map.html#TYPEt">t</a> -> ('k, 'v, 'id) <a href="Belt_MapDict.html#TYPEt">Belt_MapDict.t</a></code></pre><div class="info ">
<div class="not-examples">
<code class="code">getData s0</code>
<p>
<b>Advanced usage only</b><br>
<div class="tag"> <b>Returns</b> the raw data (detached from comparator),
but its type is still manifested, so that user can pass identity directly
without boxing<br>
</div>
</div>
</div>
<pre><span id="VALgetId"><span class="keyword">val</span> getId</span> : <code class="type">('k, 'v, 'id) <a href="Belt_Map.html#TYPEt">t</a> -> ('k, 'id) <a href="Belt_Map.html#TYPEid">id</a></code></pre><div class="info ">
<div class="not-examples">
<code class="code">getId s0</code>
<p>
<b>Advanced usage only</b><br>
<div class="tag"> <b>Returns</b> the identity of <code class="code">s0</code><br>
</div>
</div>
</div>
<pre><span id="VALpackIdData"><span class="keyword">val</span> packIdData</span> : <code class="type">id:('k, 'id) <a href="Belt_Map.html#TYPEid">id</a> -><br> data:('k, 'v, 'id) <a href="Belt_MapDict.html#TYPEt">Belt_MapDict.t</a> -> ('k, 'v, 'id) <a href="Belt_Map.html#TYPEt">t</a></code></pre><div class="info ">
<div class="not-examples">
<code class="code">packIdData ~id ~data</code>
<p>
<b>Advanced usage only</b><br>
<div class="tag"> <b>Returns</b> the packed collection<br>
</div>
</div>
</div>
</body></html>