task 3 is done

.eslintrc.js

@@ -1,84 +1,86 @@
-module.exports = {
-  extends: ['eslint:recommended', 'airbnb-base'],
-  env: {
-    browser: true,
-    node: true,
-    jest: true,
-    es6: true,
-  },
-  parser: 'babel-eslint',
-  parserOptions: {
-    sourceType: 'module',
-  },
-  rules: {
-    'import/prefer-default-export': 0,
-    'import/extensions': 0,
-    'max-classes-per-file': 0,
-    complexity: [0, 11],
-    'no-prototype-builtins': 0,
-    'prefer-destructuring': 0,
-    'no-restricted-globals': 0,
-    'consistent-return': 2,
-    curly: [2, 'multi-line'],
-    'default-case': 2,
-    'dot-location': 0,
-    'dot-notation': [2, { allowKeywords: true }],
-    eqeqeq: 1,
-    'guard-for-in': 1,
-    'no-alert': 1,
-    'no-caller': 1,
-    'no-case-declarations': 2,
-    'no-div-regex': 0,
-    'no-else-return': 2,
-    'no-empty-pattern': 0,
-    'no-eq-null': 0,
-    'no-eval': 2,
-    'no-extend-native': 2,
-    'no-extra-bind': 1,
-    'no-fallthrough': 2,
-    'no-floating-decimal': 2,
-    'no-implicit-coercion': 0,
-    'no-implied-eval': 2,
-    'no-invalid-this': 0,
-    'no-iterator': 2,
-    'no-labels': [2, { allowLoop: true, allowSwitch: true }],
-    'no-lone-blocks': 2,
-    'no-loop-func': 1,
-    'no-magic-numbers': 0,
-    'no-multi-spaces': 2,
-    'no-multi-str': 2,
-    'no-native-reassign': 2,
-    'no-new-func': 2,
-    'no-new-wrappers': 2,
-    'no-new': 0,
-    'no-octal-escape': 2,
-    'no-octal': 2,
-    'no-console': 0,
-    'no-param-reassign': [2, { props: true }],
-    'no-process-env': 0,
-    'no-proto': 0,
-    'no-redeclare': 2,
-    'no-return-assign': 2,
-    'no-script-url': 2,
-    'no-self-compare': 2,
-    'no-sequences': 2,
-    'no-throw-literal': 2,
-    'no-unused-expressions': 2,
-    'no-useless-call': 0,
-    'no-useless-concat': 0,
-    'no-void': 0,
-    'no-warning-comments': [0, { terms: ['todo', 'fixme', 'xxx'], location: 'start' }],
-    'no-with': 2,
-    radix: 2,
-    'vars-on-top': 0,
-    'wrap-iife': [2, 'outside'],
-    yoda: 2,
-  },
-  settings: {
-    'import/resolver': {
-      node: {
-        paths: ['./'],
-      },
-    },
-  },
-};
+module.exports = {
+  extends: ['eslint:recommended', 'airbnb-base'],
+  env: {
+    browser: true,
+    node: true,
+    jest: true,
+    es6: true,
+  },
+  parser: 'babel-eslint',
+  parserOptions: {
+    sourceType: 'module',
+  },
+  rules: {
+    'import/prefer-default-export': 0,
+    'import/extensions': 0,
+    'max-classes-per-file': 0,
+    complexity: [0, 11],
+    'no-prototype-builtins': 0,
+    'prefer-destructuring': 0,
+    'no-restricted-globals': 0,
+    'consistent-return': 2,
+    curly: [2, 'multi-line'],
+    'default-case': 2,
+    'dot-location': 0,
+    'dot-notation': [2, { allowKeywords: true }],
+    eqeqeq: 1,
+    'guard-for-in': 1,
+    'no-alert': 1,
+    'no-caller': 1,
+    'no-case-declarations': 2,
+    'no-div-regex': 0,
+    'no-else-return': 2,
+    'no-empty-pattern': 0,
+    'no-eq-null': 0,
+    'no-eval': 2,
+    'no-extend-native': 2,
+    'no-extra-bind': 1,
+    'no-fallthrough': 2,
+    'no-floating-decimal': 2,
+    'no-implicit-coercion': 0,
+    'no-implied-eval': 2,
+    'no-invalid-this': 0,
+    'no-iterator': 2,
+    'no-labels': [2, { allowLoop: true, allowSwitch: true }],
+    'no-lone-blocks': 2,
+    'no-loop-func': 1,
+    'no-magic-numbers': 0,
+    'no-multi-spaces': 2,
+    'no-multi-str': 2,
+    'no-native-reassign': 2,
+    'no-new-func': 2,
+    'no-new-wrappers': 2,
+    'no-new': 0,
+    'no-octal-escape': 2,
+    'no-octal': 2,
+    'no-console': 0,
+    'no-param-reassign': [2, { props: true }],
+    'no-process-env': 0,
+    'no-proto': 0,
+    'no-redeclare': 2,
+    'no-return-assign': 2,
+    'no-script-url': 2,
+    'no-self-compare': 2,
+    'no-sequences': 2,
+    'no-throw-literal': 2,
+    'no-unused-expressions': 2,
+    'no-useless-call': 0,
+    'no-useless-concat': 0,
+    'no-void': 0,
+    'no-warning-comments': [0, { terms: ['todo', 'fixme', 'xxx'], location: 'start' }],
+    'no-with': 2,
+    'no-plusplus' : 0,
+    'no-bitwise' : 0,
+    radix: 2,
+    'vars-on-top': 0,
+    'wrap-iife': [2, 'outside'],
+    yoda: 2,
+  },
+  settings: {
+    'import/resolver': {
+      node: {
+        paths: ['./'],
+      },
+    },
+  },
+};

src/ex3_js-objects-part1/task-01.js

@@ -0,0 +1,11 @@
+const person = {
+  name: 'Den',
+  surname: 'Steshin',
+  age: 26,
+  birthdate: '26.11.1995',
+  student: true,
+  skills: { html: 'expert', css: 'expert', javascript: 'expert' },
+  resident: ['Russian Federation', 'Ryazan'],
+};
+
+delete person.age;

src/ex3_js-objects-part1/task-02.js

@@ -0,0 +1,7 @@
+function showValues(object) {
+  for (const key in object) {
+    console.log(key, object[key]);
+  }
+}
+
+module.exports = showValues();

src/ex3_js-objects-part1/task-03.js

@@ -0,0 +1,10 @@
+function checkPropertyInObject(property, object) {
+  for (const key in object) {
+    if (property === key && object.hasOwnProperty(key)) {
+      return true;
+    }
+  }
+  return false;
+}
+
+module.exports = checkPropertyInObject;

src/ex3_js-objects-part1/task-04.js

@@ -0,0 +1,13 @@
+function addValueInObject(string, object) {
+  for (const key in object) {
+    if (string === key && object.hasOwnProperty(key)) {
+      return true;
+    }
+  }
+
+  object[string] = 'new';
+
+  return object;
+}
+
+module.exports = addValueInObject;

src/ex3_js-objects-part1/task-05.js

@@ -0,0 +1,5 @@
+function cloneObject(object) {
+  return { ...object };
+}
+
+module.exports = cloneObject;

src/ex3_js-objects-part1/task-06.js

@@ -0,0 +1,12 @@
+function getProperty(object, propertyPath) {
+  let currentObject = object;
+
+  for (const property of propertyPath.split('.')) {
+    if (currentObject == null) return undefined;
+    currentObject = currentObject[property];
+  }
+
+  return currentObject;
+}
+
+module.exports = getProperty;

src/ex3_js-objects-part1/task-07.js

@@ -0,0 +1,19 @@
+function deepCloneObject(object) {
+  const copyDeepObject = {};
+  for (const key in object) {
+    if (
+      typeof object[key] === 'object'
+      && object[key] !== null
+      && !(object[key] instanceof Array)
+    ) {
+      copyDeepObject[key] = deepCloneObject(object[key]);
+    } else if (object[key] instanceof Array) {
+      copyDeepObject[key] = object[key].slice(0);
+    } else {
+      copyDeepObject[key] = object[key];
+    }
+  }
+  return copyDeepObject;
+}
+
+module.exports = deepCloneObject;