Rework of #68, to use a flag to indexOf, instead of a separate function.

index.html

@@ -142,7 +142,6 @@
       <a href="#invoke">invoke</a>, <a href="#pluck">pluck</a>,
       <a href="#max">max</a>, <a href="#min">min</a>,
       <a href="#sortBy">sortBy</a>, <a href="#sortedIndex">sortedIndex</a>,
-      <a href="#sortedIndexOf">sortedIndexOf</a>,
       <a href="#toArray">toArray</a>, <a href="#size">size</a></span>
     </p>
 
@@ -453,19 +452,6 @@ _.sortBy([1, 2, 3, 4, 5, 6], function(num){ return Math.sin(num); });
       <pre>
 _.sortedIndex([10, 20, 30, 40, 50], 35);
 =&gt; 3
-</pre>
-
-      <p id="sortedIndexOf">
-        <b class="header">sortedIndexOf</b><code>_.sortedIndexOf(list, value)</code>
-        <br />
-        Not to be confused with <tt>_.sortedIndex</tt>, this method works like 
-        the native <tt>indexOf</tt>, but uses binary search to efficiently
-        find the value in large, already-sorted arrays. Returns <tt>-1</tt>
-        if the value is not present.
-      </p>
-      <pre>
-_.sortedIndex([10, 20, 30, 40, 50], 30);
-=&gt; 2
 </pre>
 
       <p id="toArray">
@@ -599,11 +585,13 @@ _.zip(['moe', 'larry', 'curly'], [30, 40, 50], [true, false, false]);
 </pre>
 
       <p id="indexOf">
-        <b class="header">indexOf</b><code>_.indexOf(array, value)</code>
+        <b class="header">indexOf</b><code>_.indexOf(array, value, [isSorted])</code>
         <br />
         Returns the index at which <b>value</b> can be found in the <b>array</b>,
         or <i>-1</i> if value is not present in the <b>array</b>. Uses the native
-        <b>indexOf</b> function unless it's missing.
+        <b>indexOf</b> function unless it's missing. If you're working with a 
+        large array, and you know that the array is already sorted, pass <tt>true</tt>
+        for <b>isSorted</b> to use a faster binary search.
       </p>
       <pre>
 _.indexOf([1, 2, 3], 2);