diff --git a/index.js b/index.js
index e69de29bb..cd26025e8 100644
--- a/index.js
+++ b/index.js
@@ -0,0 +1,19 @@
+function updateObjectWithKeyAndValue(obj, key, value){
+  return Object.assign({}, obj, {[key] : value});
+}
+
+function destructivelyUpdateObjectWithKeyAndValue(obj, key, val){
+  obj[key]=val;
+  return obj;
+}
+
+function deleteFromObjectByKey(obj, key){
+  var newObj = Object.assign({}, obj);
+  delete newObj[key];
+  return newObj;
+}
+
+function destructivelyDeleteFromObjectByKey(obj, key){
+  delete obj[key];
+  return Object.assign({},obj);
+}