t> with the value of <tt>x</tt>
and return <tt>b[i]</tt>.</td>
</tr>

<tr>
<td><tt>b[i] ^= x</tt></td>
<td>Exclusive-Or the ith bit of <tt>b</tt> with the value of
<tt>x</tt> and return <tt>b[i]</tt>.</td>
</tr>

<tr>
<td><tt>b[i] -= x</tt></td>
<td>If <tt>x==true</tt>, clear the ith bit of <tt>b</tt>. Returns
<tt>b[i]</tt>.</td>
</tr>

<tr>
<td><tt>b[i] = b[j]</tt></td>
<td>Set the ith bit of <tt>b</tt> to the value of the jth bit of
<tt>b</tt> and return <tt>b[i]</tt>.</td>
</tr>

<tr>
<td><tt>b[i] |= b[j