<h2 id="heading-url">URL</h2>
<p><a href="https://leetcode.com/problems/unique-number-of-occurrences/" class="autolinkedURL autolinkedURL-url" target="_blank">leetcode.com/problems/unique-number-of-occu..</a></p>
<h2 id="heading-code">Code</h2>
<p><a href="https://github.com/syohex/dotnet-study/blob/master/fsharp/leetcode/problems/1207/main.fsx" class="autolinkedURL autolinkedURL-url" target="_blank">github.com/syohex/dotnet-study/blob/master/..</a></p>
<pre><code class="lang-fsharp">let uniqueOccurences (arr: int list) : bool =
    arr
    |&gt; List.fold
        (fun acc n -&gt;
            match Map.tryFind n acc with
            | Some (v) -&gt; Map.add n (v + 1) acc
            | None -&gt; Map.add n 1 acc)
        Map.empty
    |&gt; Map.values
    |&gt; Seq.fold
        (fun acc n -&gt;
            match Map.tryFind n acc with
            | Some (v) -&gt; Map.add n (v + 1) acc
            | None -&gt; Map.add n 1 acc)
        Map.empty
    |&gt; Map.forall (fun _ v -&gt; v = 1)
</code></pre>


## URL

https://leetcode.com/problems/unique-number-of-occurrences/

## Code

https://github.com/syohex/dotnet-study/blob/master/fsharp/leetcode/problems/1207/main.fsx

```fsharp
let uniqueOccurences (arr: int list) : bool =
    arr
    |> List.fold
        (fun acc n ->
            match Map.tryFind n acc with
            | Some (v) -> Map.add n (v + 1) acc
            | None -> Map.add n 1 acc)
        Map.empty
    |> Map.values
    |> Seq.fold
        (fun acc n ->
            match Map.tryFind n acc with
            | Some (v) -> Map.add n (v + 1) acc
            | None -> Map.add n 1 acc)
        Map.empty
    |> Map.forall (fun _ v -> v = 1)
```

LeetCode 1207. Unique Number of Occurrences in F#

URL

Code