Bump to v3.4.0.

internal/createComposer.js

@@ -0,0 +1,39 @@
+/** Used as the `TypeError` message for "Functions" methods. */
+var FUNC_ERROR_TEXT = 'Expected a function';
+
+/**
+ * Creates a function to compose other functions into a single function.
+ *
+ * @private
+ * @param {boolean} [fromRight] Specify iterating from right to left.
+ * @returns {Function} Returns the new composer function.
+ */
+function createComposer(fromRight) {
+  return function() {
+    var length = arguments.length,
+        index = length,
+        fromIndex = fromRight ? length - 1 : 0;
+
+    if (!length) {
+      return function() { return arguments[0]; };
+    }
+    var funcs = Array(length);
+    while (index--) {
+      funcs[index] = arguments[index];
+      if (typeof funcs[index] != 'function') {
+        throw new TypeError(FUNC_ERROR_TEXT);
+      }
+    }
+    return function() {
+      var index = fromIndex,
+          result = funcs[index].apply(this, arguments);
+
+      while ((fromRight ? index-- : ++index < length)) {
+        result = funcs[index].call(this, result);
+      }
+      return result;
+    };
+  };
+}
+
+export default createComposer;