Rewriting Project

1 files changed, 13 insertions, 0 deletions

diff --git a/node_modules/core-js/internals/map-emplace.js b/node_modules/core-js/internals/map-emplace.js
new file mode 100644
index 0000000..dded28c
--- /dev/null
+++ b/node_modules/core-js/internals/map-emplace.js
@@ -0,0 +1,13 @@
+'use strict';
+var anObject = require('../internals/an-object');
+
+// `Map.prototype.emplace` method
+// https://github.com/thumbsupep/proposal-upsert
+module.exports = function emplace(key, handler) {
+  var map = anObject(this);
+  var value = (map.has(key) && 'update' in handler)
+    ? handler.update(map.get(key), key, map)
+    : handler.insert(key, map);
+  map.set(key, value);
+  return value;
+};