Bump to v4.0.0.

sortedIndexBy.js

@@ -0,0 +1,31 @@
+import baseIteratee from './internal/baseIteratee';
+import baseSortedIndexBy from './internal/baseSortedIndexBy';
+
+/**
+ * This method is like `_.sortedIndex` except that it accepts `iteratee`
+ * which is invoked for `value` and each element of `array` to compute their
+ * sort ranking. The iteratee is invoked with one argument: (value).
+ *
+ * @static
+ * @memberOf _
+ * @category Array
+ * @param {Array} array The sorted array to inspect.
+ * @param {*} value The value to evaluate.
+ * @param {Function|Object|string} [iteratee=_.identity] The iteratee invoked per element.
+ * @returns {number} Returns the index at which `value` should be inserted into `array`.
+ * @example
+ *
+ * var dict = { 'thirty': 30, 'forty': 40, 'fifty': 50 };
+ *
+ * _.sortedIndexBy(['thirty', 'fifty'], 'forty', _.propertyOf(dict));
+ * // => 1
+ *
+ * // using the `_.property` iteratee shorthand
+ * _.sortedIndexBy([{ 'x': 4 }, { 'x': 5 }], { 'x': 4 }, 'x');
+ * // => 0
+ */
+function sortedIndexBy(array, value, iteratee) {
+  return baseSortedIndexBy(array, value, baseIteratee(iteratee));
+}
+
+export default sortedIndexBy;