Bump to v4.0.0.

internal/baseSortedUniqBy.js

@@ -0,0 +1,34 @@
+define(['../eq'], function(eq) {
+
+  /**
+   * The base implementation of `_.sortedUniqBy` without support for iteratee
+   * shorthands.
+   *
+   * @private
+   * @param {Array} array The array to inspect.
+   * @param {Function} [iteratee] The iteratee invoked per element.
+   * @returns {Array} Returns the new duplicate free array.
+   */
+  function baseSortedUniqBy(array, iteratee) {
+    var index = 0,
+        length = array.length,
+        value = array[0],
+        computed = iteratee ? iteratee(value) : value,
+        seen = computed,
+        resIndex = 0,
+        result = [value];
+
+    while (++index < length) {
+      value = array[index],
+      computed = iteratee ? iteratee(value) : value;
+
+      if (!eq(computed, seen)) {
+        seen = computed;
+        result[++resIndex] = value;
+      }
+    }
+    return result;
+  }
+
+  return baseSortedUniqBy;
+});