lass="type">'a <a href="Weak.html#TYPEt">t</a> -&gt; int -&gt; 'a <a href="Weak.html#TYPEt">t</a> -&gt; int -&gt; int -&gt; unit</code></pre><div class="info ">
<code class="code"><span class="constructor">Weak</span>.blit ar1 off1 ar2 off2 len</code> copies <code class="code">len</code> weak pointers
   from <code class="code">ar1</code> (starting at <code class="code">off1</code>) to <code class="code">ar2</code> (starting at <code class="code">off2</code>).
   It works correctly even if <code class="code