.</p>
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<pre id="VALfold_left">val fold_left : f:('a -&gt; char -&gt; 'a) -&gt; init:'a -&gt; bytes -&gt; 'a</pre><div class="info ">
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<p><code class="code">fold_left&nbsp;f&nbsp;x&nbsp;s</code> computes
    <code class="code">f&nbsp;(...&nbsp;(f&nbsp;(f&nbsp;x&nbsp;(get&nbsp;s&nbsp;0))&nbsp;(get&nbsp;s&nbsp;1))&nbsp;...)&nbsp;(get&nbsp;s&nbsp;(n-1))</code>,
    where <code class="code">n</code> is the length of <code class="code">s</code>.</p>
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