span>&#45;&gt;</span> <span class="type-var">'a</span>)</span> <span>&#45;&gt;</span> <span><span class="type-var">'a</span> <a href="index.html#type-t">t</a></span> <span>&#45;&gt;</span> <span class="type-var">'a</span></code></dt><dd><p>Same as fold_left, but do not require a start element, instead the function start with the first element of the list: <code>fold_left_same f [b1; ...; bn] = f (... (f (f b1 b2) ...) bn</code>.</p><p>It will fail with <code>Invalid_argument</code> if the list is empty.</p>