Bump to v3.4.0.

function/flow.js

@@ -1,7 +1,4 @@
-define(['../internal/arrayEvery', '../internal/baseIsFunction'], function(arrayEvery, baseIsFunction) {
-
-  /** Used as the `TypeError` message for "Functions" methods. */
-  var FUNC_ERROR_TEXT = 'Expected a function';
+define(['../internal/createComposer'], function(createComposer) {
 
   /**
    * Creates a function that returns the result of invoking the provided
@@ -15,38 +12,15 @@ define(['../internal/arrayEvery', '../internal/baseIsFunction'], function(arrayE
    * @returns {Function} Returns the new function.
    * @example
    *
-   * function add(x, y) {
-   *   return x + y;
-   * }
-   *
    * function square(n) {
    *   return n * n;
    * }
    *
-   * var addSquare = _.flow(add, square);
+   * var addSquare = _.flow(_.add, square);
    * addSquare(1, 2);
    * // => 9
    */
-  function flow() {
-    var funcs = arguments,
-        length = funcs.length;
-
-    if (!length) {
-      return function() { return arguments[0]; };
-    }
-    if (!arrayEvery(funcs, baseIsFunction)) {
-      throw new TypeError(FUNC_ERROR_TEXT);
-    }
-    return function() {
-      var index = 0,
-          result = funcs[index].apply(this, arguments);
-
-      while (++index < length) {
-        result = funcs[index].call(this, result);
-      }
-      return result;
-    };
-  }
+  var flow = createComposer();
 
   return flow;
 });