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<p>Erase an entry by key. </p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">m</td><td>Map to modify </td></tr>
    <tr><td class="paramname">key</td><td>Key to erase </td></tr>
  </table>
  </dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>1 if erased, 0 if key not present </dd></dl>

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