<h2 id="heading-url">URL</h2>
<p><a target="_blank" href="https://leetcode.com/problems/determine-if-string-halves-are-alike/">https://leetcode.com/problems/determine-if-string-halves-are-alike/</a></p>
<h2 id="heading-code">Code</h2>
<p><a target="_blank" href="https://github.com/syohex/dotnet-study/blob/master/fsharp/leetcode/problems/1704/main.fsx">https://github.com/syohex/dotnet-study/blob/master/fsharp/leetcode/problems/1704/main.fsx</a></p>
<pre><code class="lang-plaintext">let halvesAreAlike (s: string) : bool =
    let isVowel c =
        let c' = System.Char.ToLower(c)

        c' = 'a'
        || c' = 'e'
        || c' = 'i'
        || c' = 'o'
        || c' = 'u'

    let countVowel cs =
        let rec countVowel' cs acc =
            match cs with
            | [] -&gt; acc
            | h :: t -&gt; countVowel' t (acc + if isVowel h then 1 else 0)

        countVowel' cs 0

    let half = s.Length / 2
    let cs = s |&gt; Seq.toList
    let front = cs |&gt; List.take half
    let last = cs |&gt; List.skip half

    (countVowel front) = (countVowel last)
</code></pre>


## URL

[https://leetcode.com/problems/determine-if-string-halves-are-alike/](https://leetcode.com/problems/determine-if-string-halves-are-alike/)

## Code

[https://github.com/syohex/dotnet-study/blob/master/fsharp/leetcode/problems/1704/main.fsx](https://github.com/syohex/dotnet-study/blob/master/fsharp/leetcode/problems/1704/main.fsx)

```plaintext
let halvesAreAlike (s: string) : bool =
    let isVowel c =
        let c' = System.Char.ToLower(c)

        c' = 'a'
        || c' = 'e'
        || c' = 'i'
        || c' = 'o'
        || c' = 'u'

    let countVowel cs =
        let rec countVowel' cs acc =
            match cs with
            | [] -> acc
            | h :: t -> countVowel' t (acc + if isVowel h then 1 else 0)

        countVowel' cs 0

    let half = s.Length / 2
    let cs = s |> Seq.toList
    let front = cs |> List.take half
    let last = cs |> List.skip half

    (countVowel front) = (countVowel last)
```

LeetCode 1704. Determine if String Halves Are Alike

URL

Code