Bump to v4.1.0.

_isIterateeCall.js

@@ -0,0 +1,26 @@
+define(['./eq', './isArrayLike', './_isIndex', './isObject'], function(eq, isArrayLike, isIndex, isObject) {
+
+  /**
+   * Checks if the provided arguments are from an iteratee call.
+   *
+   * @private
+   * @param {*} value The potential iteratee value argument.
+   * @param {*} index The potential iteratee index or key argument.
+   * @param {*} object The potential iteratee object argument.
+   * @returns {boolean} Returns `true` if the arguments are from an iteratee call, else `false`.
+   */
+  function isIterateeCall(value, index, object) {
+    if (!isObject(object)) {
+      return false;
+    }
+    var type = typeof index;
+    if (type == 'number'
+        ? (isArrayLike(object) && isIndex(index, object.length))
+        : (type == 'string' && index in object)) {
+      return eq(object[index], value);
+    }
+    return false;
+  }
+
+  return isIterateeCall;
+});