Bump to v4.0.0.

wrap.js

@@ -0,0 +1,30 @@
+define(['./identity', './partial'], function(identity, partial) {
+
+  /**
+   * Creates a function that provides `value` to the wrapper function as its
+   * first argument. Any additional arguments provided to the function are
+   * appended to those provided to the wrapper function. The wrapper is invoked
+   * with the `this` binding of the created function.
+   *
+   * @static
+   * @memberOf _
+   * @category Function
+   * @param {*} value The value to wrap.
+   * @param {Function} wrapper The wrapper function.
+   * @returns {Function} Returns the new function.
+   * @example
+   *
+   * var p = _.wrap(_.escape, function(func, text) {
+   *   return '<p>' + func(text) + '</p>';
+   * });
+   *
+   * p('fred, barney, & pebbles');
+   * // => '<p>fred, barney, &amp; pebbles</p>'
+   */
+  function wrap(value, wrapper) {
+    wrapper = wrapper == null ? identity : wrapper;
+    return partial(wrapper, value);
+  }
+
+  return wrap;
+});