js 31 Object.keys, values, entries end

JavaScript/3_Data_Types/js_31_keys_values_entries/script.js

@@ -0,0 +1,37 @@
+'use strict';
+
+let obj = {
+  name: 'Nazariy',
+  age: 20,
+  gender: 'male',
+  address: {
+    street: '123 Main St',
+    city: 'New York',
+    state: 'NY',
+  },
+  phone: '555-555-5555',
+  email: 'kenaa@example.com',
+  password: 'password',
+  role: 'admin',
+  [Symbol('isOnline')]: true,
+  [Symbol('isRunning')]: true,
+};
+
+console.log(Object.values(obj));
+console.log(Object.keys(obj));
+console.log(Object.entries(obj));
+
+console.log(Object.getOwnPropertySymbols(obj)); //повертає всі ключі символи
+console.log(Reflect.ownKeys(obj)); // повертає усі ключі
+
+let prices = {
+  banana: 1,
+  orange: 2,
+  meat: 4,
+};
+
+let doublePrices = Object.fromEntries(
+  Object.entries(prices).map((entry) => [entry[0], entry[1] * 2])
+);
+
+console.log(doublePrices);

JavaScript/3_Data_Types/js_31_keys_values_entries/tasks/salariesSum.js

@@ -0,0 +1,19 @@
+'use strict';
+
+let salaries = {
+  John: 100,
+  Pete: 300,
+  Mary: 250,
+};
+
+function salariesSum(salaries) {
+  return Object.values(salaries).reduce((sum, salary) => sum + salary, 0);
+}
+
+function count(obj) {
+  return Object.keys(obj).length;
+}
+
+console.log(salariesSum(salaries));
+
+console.log(count(salaries));