Bump to v4.0.0.

internal/assocSet.js

@@ -0,0 +1,21 @@
+define(['./assocIndexOf'], function(assocIndexOf) {
+
+  /**
+   * Sets the associative array `key` to `value`.
+   *
+   * @private
+   * @param {Array} array The array to modify.
+   * @param {string} key The key of the value to set.
+   * @param {*} value The value to set.
+   */
+  function assocSet(array, key, value) {
+    var index = assocIndexOf(array, key);
+    if (index < 0) {
+      array.push([key, value]);
+    } else {
+      array[index][1] = value;
+    }
+  }
+
+  return assocSet;
+});