Bump to v4.0.0.

internal/assocSet.js

@@ -0,0 +1,20 @@
+var assocIndexOf = require('./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;
+  }
+}
+
+module.exports = assocSet;