anguage="janet">(<span class="mdzsyn-coresym">defn</span> <span class="mdzsyn-symbol">ignore-extra</span>
 [<span class="mdzsyn-symbol">x</span> <span class="mdzsyn-symbol">&amp;</span>]
 (<span class="mdzsyn-coresym">+</span> <span class="mdzsyn-symbol">x</span> <span class="mdzsyn-number">1</span>))

(<span class="mdzsyn-symbol">ignore-extra</span> <span class="mdzsyn-number">1</span> <span class="mdzsyn-number">2</span> <span class="mdzsyn-number">3</span> <span class="mdzsyn-number">4</span> <span class