Bump to v3.0.0.

internal/createAssigner.js

@@ -0,0 +1,40 @@
+import bindCallback from './bindCallback';
+import isIterateeCall from './isIterateeCall';
+
+/**
+ * Creates a function that assigns properties of source object(s) to a given
+ * destination object.
+ *
+ * @private
+ * @param {Function} assigner The function to assign values.
+ * @returns {Function} Returns the new assigner function.
+ */
+function createAssigner(assigner) {
+  return function() {
+    var length = arguments.length,
+        object = arguments[0];
+
+    if (length < 2 || object == null) {
+      return object;
+    }
+    if (length > 3 && isIterateeCall(arguments[1], arguments[2], arguments[3])) {
+      length = 2;
+    }
+    // Juggle arguments.
+    if (length > 3 && typeof arguments[length - 2] == 'function') {
+      var customizer = bindCallback(arguments[--length - 1], arguments[length--], 5);
+    } else if (length > 2 && typeof arguments[length - 1] == 'function') {
+      customizer = arguments[--length];
+    }
+    var index = 0;
+    while (++index < length) {
+      var source = arguments[index];
+      if (source) {
+        assigner(object, source, customizer);
+      }
+    }
+    return object;
+  };
+}
+
+export default createAssigner;