Bump to v4.0.0.

internal/assocDelete.js

@@ -0,0 +1,32 @@
+define(['./assocIndexOf'], function(assocIndexOf) {
+
+  /** Used for built-in method references. */
+  var arrayProto = Array.prototype;
+
+  /** Built-in value references. */
+  var splice = arrayProto.splice;
+
+  /**
+   * Removes `key` and its value from the associative array.
+   *
+   * @private
+   * @param {Array} array The array to query.
+   * @param {string} key The key of the value to remove.
+   * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+   */
+  function assocDelete(array, key) {
+    var index = assocIndexOf(array, key);
+    if (index < 0) {
+      return false;
+    }
+    var lastIndex = array.length - 1;
+    if (index == lastIndex) {
+      array.pop();
+    } else {
+      splice.call(array, index, 1);
+    }
+    return true;
+  }
+
+  return assocDelete;
+});