Day 3 Exercise solution

.directory

@@ -0,0 +1,6 @@
+[Dolphin]
+Timestamp=2020,3,15,12,57,31
+Version=4
+
+[Settings]
+HiddenFilesShown=true

.eslint.js

@@ -0,0 +1,116 @@
+/** @format */
+
+module.exports = {
+	extends: ["airbnb", "prettier", "prettier/react"],
+	parser: "babel-eslint",
+	parserOptions: {
+		ecmaVersion: 2020,
+		// Can I remove these now?
+		ecmaFeatures: {
+			impliedStrict: true,
+			classes: true
+		}
+	},
+	env: {
+		browser: true,
+		node: true,
+		jquery: true,
+		jest: true
+	},
+	rules: {
+		"no-debugger": 0,
+		"no-alert": 0,
+		"no-await-in-loop": 0,
+		"no-return-assign": ["error", "except-parens"],
+		"no-restricted-syntax": [
+			2,
+			"ForInStatement",
+			"LabeledStatement",
+			"WithStatement"
+		],
+		"no-unused-vars": [
+			1,
+			{
+				ignoreSiblings: true,
+				argsIgnorePattern: "res|next|^err"
+			}
+		],
+		"prefer-const": [
+			"error",
+			{
+				destructuring: "all"
+			}
+		],
+		"arrow-body-style": [2, "as-needed"],
+		"no-unused-expressions": [
+			2,
+			{
+				allowTaggedTemplates: true
+			}
+		],
+		"no-param-reassign": [
+			2,
+			{
+				props: false
+			}
+		],
+		"no-console": 0,
+		"import/prefer-default-export": 0,
+		import: 0,
+		"func-names": 0,
+		"space-before-function-paren": 0,
+		"comma-dangle": 0,
+		"max-len": 0,
+		"import/extensions": 0,
+		"no-underscore-dangle": 0,
+		"consistent-return": 0,
+		"react/display-name": 1,
+		"react/no-array-index-key": 0,
+		"react/react-in-jsx-scope": 0,
+		"react/prefer-stateless-function": 0,
+		"react/forbid-prop-types": 0,
+		"react/no-unescaped-entities": 0,
+		"jsx-a11y/accessible-emoji": 0,
+		"react/require-default-props": 0,
+		"react/jsx-filename-extension": [
+			1,
+			{
+				extensions: [".js", ".jsx"]
+			}
+		],
+		radix: 0,
+		"no-shadow": [
+			2,
+			{
+				hoist: "all",
+				allow: ["resolve", "reject", "done", "next", "err", "error"]
+			}
+		],
+		quotes: [
+			2,
+			"single",
+			{
+				avoidEscape: true,
+				allowTemplateLiterals: true
+			}
+		],
+		"prettier/prettier": [
+			"error",
+			{
+				trailingComma: "es5",
+				singleQuote: true,
+				printWidth: 80
+			}
+		],
+		"jsx-a11y/href-no-hash": "off",
+		"jsx-a11y/anchor-is-valid": [
+			"warn",
+			{
+				aspects: ["invalidHref"]
+			}
+		],
+		"react-hooks/rules-of-hooks": "error",
+		"react-hooks/exhaustive-deps": "warn"
+	},
+	plugins: ["html", "prettier", "react-hooks"]
+};

.eslintrc

@@ -0,0 +1,21 @@
+{
+  "extends": "airbnb",
+  "env": {
+    "jest": true
+  },
+  "rules": {
+    "no-restricted-syntax": 0,
+    "arrow-parens": 0,
+    "import/prefer-default-export": 0,
+    "no-console": 2,
+    "prettier/prettier": [
+      "error",
+      {
+        "trailingComma": "es5",
+        "singleQuote": true,
+        "printWidth": 120,
+        "tabWidth": 8,
+      }
+    ]
+  }
+}

.eslintrc.json

@@ -0,0 +1,3 @@
+{
+	"extends": ["wesbos"]
+}

js-exercises/.directory

@@ -0,0 +1,6 @@
+[Dolphin]
+Timestamp=2020,3,15,12,44,55
+Version=4
+
+[Settings]
+HiddenFilesShown=true

js-exercises/.eslint.js

@@ -0,0 +1,116 @@
+/** @format */
+
+module.exports = {
+	extends: ["airbnb", "prettier", "prettier/react"],
+	parser: "babel-eslint",
+	parserOptions: {
+		ecmaVersion: 2020,
+		// Can I remove these now?
+		ecmaFeatures: {
+			impliedStrict: true,
+			classes: true
+		}
+	},
+	env: {
+		browser: true,
+		node: true,
+		jquery: true,
+		jest: true
+	},
+	rules: {
+		"no-debugger": 0,
+		"no-alert": 0,
+		"no-await-in-loop": 0,
+		"no-return-assign": ["error", "except-parens"],
+		"no-restricted-syntax": [
+			2,
+			"ForInStatement",
+			"LabeledStatement",
+			"WithStatement"
+		],
+		"no-unused-vars": [
+			1,
+			{
+				ignoreSiblings: true,
+				argsIgnorePattern: "res|next|^err"
+			}
+		],
+		"prefer-const": [
+			"error",
+			{
+				destructuring: "all"
+			}
+		],
+		"arrow-body-style": [2, "as-needed"],
+		"no-unused-expressions": [
+			2,
+			{
+				allowTaggedTemplates: true
+			}
+		],
+		"no-param-reassign": [
+			2,
+			{
+				props: false
+			}
+		],
+		"no-console": 0,
+		"import/prefer-default-export": 0,
+		import: 0,
+		"func-names": 0,
+		"space-before-function-paren": 0,
+		"comma-dangle": 0,
+		"max-len": 0,
+		"import/extensions": 0,
+		"no-underscore-dangle": 0,
+		"consistent-return": 0,
+		"react/display-name": 1,
+		"react/no-array-index-key": 0,
+		"react/react-in-jsx-scope": 0,
+		"react/prefer-stateless-function": 0,
+		"react/forbid-prop-types": 0,
+		"react/no-unescaped-entities": 0,
+		"jsx-a11y/accessible-emoji": 0,
+		"react/require-default-props": 0,
+		"react/jsx-filename-extension": [
+			1,
+			{
+				extensions: [".js", ".jsx"]
+			}
+		],
+		radix: 0,
+		"no-shadow": [
+			2,
+			{
+				hoist: "all",
+				allow: ["resolve", "reject", "done", "next", "err", "error"]
+			}
+		],
+		quotes: [
+			2,
+			"single",
+			{
+				avoidEscape: true,
+				allowTemplateLiterals: true
+			}
+		],
+		"prettier/prettier": [
+			"error",
+			{
+				trailingComma: "es5",
+				singleQuote: true,
+				printWidth: 80
+			}
+		],
+		"jsx-a11y/href-no-hash": "off",
+		"jsx-a11y/anchor-is-valid": [
+			"warn",
+			{
+				aspects: ["invalidHref"]
+			}
+		],
+		"react-hooks/rules-of-hooks": "error",
+		"react-hooks/exhaustive-deps": "warn"
+	},
+	plugins: ["html", "prettier", "react-hooks"]
+};

js-exercises/.eslintrc

@@ -6,6 +6,16 @@
   "rules": {
     "no-restricted-syntax": 0,
     "arrow-parens": 0,
-    "import/prefer-default-export": 0
+    "import/prefer-default-export": 0,
+    "no-console": 2,
+    "prettier/prettier": [
+      "error",
+      {
+        "trailingComma": "es5",
+        "singleQuote": true,
+        "printWidth": 120,
+        "tabWidth": 8,
+      }
+    ]
   }
 }

js-exercises/.eslintrc.json

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+{
+	"extends": ["wesbos"]
+}

js-exercises/abbreviate-string/README.md

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+# Instructions
+
+- Given a string return the abbreviated version of the string
+
+For example -
+
+Given `Hacktober Fest` as the input the function should return `Hacktober F.`

js-exercises/abbreviate-string/abbreviateString.js

@@ -0,0 +1,31 @@
+/**
+ * Please be sincear and let me know about all the mistakes i have made
+ * please be a little kind as i am still a novoice and am still learning
+ *                                                              @Bhargav Mantha
+ *
+ * Procedure/Approach/psudo code i am following
+ * 1.now check if the input is a string or else return an error
+ * 2.split the input string into words
+ * 3.make the abbrivation return it
+ */
+const util = require('util');
+
+const getWordsFromString = string => string.split(' ');
+const checkIfString = string => util.isString(string);
+function abbreviateString(string) {
+  const stringCondition = checkIfString(string);
+  let abbrivatedString = '';
+  if (stringCondition) {
+    const wordsArray = getWordsFromString(string);
+    abbrivatedString = `${wordsArray[0]} ${[
+      ...wordsArray[wordsArray.length - 1],
+    ][0].toUpperCase()}.`;
+    return abbrivatedString;
+  }
+  const error = new Error(
+    `Sorry. Could not eveluate the input.Reason the input was not a sting.expected string got <${typeof string}>`
+  );
+  throw error;
+}
+// console.log(abbreviateString('Leeroy Fitzgerald Jenkins'));
+export { abbreviateString };

js-exercises/abbreviate-string/abbreviateString.test.js

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+import { abbreviateString } from './abbreviateString';
+
+describe('abbreviateString', () => {
+  it('abbreviates the following strings', () => {
+    expect(abbreviateString('Hacktober Fest')).toEqual('Hacktober F.');
+    expect(abbreviateString('Leeroy Fitzgerald Jenkins')).toEqual('Leeroy J.');
+    expect(abbreviateString('Some arbitrary string length here.')).toEqual(
+      'Some H.'
+    );
+  });
+
+  it('throws error on invalid parameters', () => {
+    expect(() => abbreviateString(123)).toThrow();
+    expect(() => abbreviateString([])).toThrow();
+    expect(() => abbreviateString({})).toThrow();
+    expect(() => abbreviateString(null)).toThrow();
+  });
+});

js-exercises/add-big-integers/README.md

@@ -0,0 +1,17 @@
+# Instructions
+
+- Given a string with numbers separated by `\n`, return the sum of these numbers
+
+For example -
+
+```js
+`539
+8
+201`;
+```
+
+// Add the numbers 539, 8 and 201
+
+# Restrictions
+
+- Don't use `BigInt` implementation of JavaScript.