<h2 id="heading-url">URL</h2>
<p><a target="_blank" href="https://leetcode.com/problems/check-if-a-word-occurs-as-a-prefix-of-any-word-in-a-sentence/description/?envType=daily-question&amp;envId=2024-12-02">https://leetcode.com/problems/check-if-a-word-occurs-as-a-prefix-of-any-word-in-a-sentence/description/?envType=daily-question&amp;envId=2024-12-02</a></p>
<h2 id="heading-code">Code</h2>
<p><a target="_blank" href="https://github.com/syohex/dotnet-study/blob/master/fsharp/leetcode/challenge/202412/check_if_a_word_occurs_as_a_prefix_of_any_word_in_a_sentence/main.fsx">https://github.com/syohex/dotnet-study/blob/master/fsharp/leetcode/challenge/202412/check_if_a_word_occurs_as_a_prefix_of_any_word_in_a_sentence/main.fsx</a></p>
<pre><code class="lang-fsharp"><span class="hljs-keyword">let</span> isPrefixOfWord (sentence: string) (searchWord: string) : int =
    sentence.Split(' ')
    |&gt; Array.tryFindIndex (<span class="hljs-keyword">fun</span> s -&gt; s.StartsWith(searchWord))
    |&gt; Option.map ((+) <span class="hljs-number">1</span>)
    |&gt; Option.defaultValue <span class="hljs-number">-1</span>
</code></pre>


## URL

[https://leetcode.com/problems/check-if-a-word-occurs-as-a-prefix-of-any-word-in-a-sentence/description/?envType=daily-question&envId=2024-12-02](https://leetcode.com/problems/check-if-a-word-occurs-as-a-prefix-of-any-word-in-a-sentence/description/?envType=daily-question&envId=2024-12-02)

## Code

[https://github.com/syohex/dotnet-study/blob/master/fsharp/leetcode/challenge/202412/check\_if\_a\_word\_occurs\_as\_a\_prefix\_of\_any\_word\_in\_a\_sentence/main.fsx](https://github.com/syohex/dotnet-study/blob/master/fsharp/leetcode/challenge/202412/check_if_a_word_occurs_as_a_prefix_of_any_word_in_a_sentence/main.fsx)

```fsharp
let isPrefixOfWord (sentence: string) (searchWord: string) : int =
    sentence.Split(' ')
    |> Array.tryFindIndex (fun s -> s.StartsWith(searchWord))
    |> Option.map ((+) 1)
    |> Option.defaultValue -1
```

LeetCode 1455. Check If a Word Occurs As a Prefix of Any Word in a Sentence in F#

URL

Code