Challenge three

chainingMethods/challenges-10.test.js

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+
+'use strict';
+
+// ------------------------------------------------------------------------------------------------
+// CHALLENGE 1
+//
+// Write a function named count that, given an integer and an array of arrays, uses either
+// filter, map, or reduce to count the amount of times the integer is present in the array of arrays.
+//
+// Note: You might need to use the same method more than once.
+//
+// For example, count(5, [[1, 3, 5, 7, 9], [5, 5, 5], [1, 2, 3]]) returns 4.
+// ------------------------------------------------------------------------------------------------
+
+const count = (target, input) => {
+  // Solution code here...
+};
+
+// ------------------------------------------------------------------------------------------------
+// CHALLENGE 2
+//
+// Write a function that, given an array of integer arrays as input, either filter, map, or reduce
+// to calculate the total sum of all the elements in the array.
+//
+// Note: You might need to use the same method more than once.
+// ------------------------------------------------------------------------------------------------
+
+const totalSum = (input) => {
+  // Solution code here...
+};
+
+// ------------------------------------------------------------------------------------------------
+// CHALLENGE 3
+
+// Write a function named divisibleByFiveTwoToThePower that accpets an array of arrays as input.
+//
+// This function should first remove any elements that are not numbers or are not divisible by five.
+//
+// This function should then raise 2 to the power of the resulting numbers, returning an array of arrays.
+//
+// For example, [ [0,2,5,4], [2,4,10], [] ] should return [ [1, 32], [1024], [] ].
+// ------------------------------------------------------------------------------------------------
+
+const divisibleByFiveTwoToThePower = (input) => {
+  // Solution code here...
+};
+
+// ------------------------------------------------------------------------------------------------
+// CHALLENGE 4
+//
+// Write a function named findMaleAndFemale that, given the Star Wars data, below,
+// returns the names of the characters whose gender is either male or female.
+//
+// The names should be combined into a single string with each character name separated by "and".
+//
+// For example, "C-3PO and Luke Skywalker".
+// ------------------------------------------------------------------------------------------------
+
+let starWarsData = [{
+  name: 'Luke Skywalker',
+  height: '172',
+  mass: '77',
+  hair_color: 'blond',
+  skin_color: 'fair',
+  eye_color: 'blue',
+  birth_year: '19BBY',
+  gender: 'male',
+},
+{
+  name: 'C-3PO',
+  height: '167',
+  mass: '75',
+  hair_color: 'n/a',
+  skin_color: 'gold',
+  eye_color: 'yellow',
+  birth_year: '112BBY',
+  gender: 'n/a'},
+{
+  name: 'R2-D2',
+  height: '96',
+  mass: '32',
+  hair_color: 'n/a',
+  skin_color: 'white, blue',
+  eye_color: 'red',
+  birth_year: '33BBY',
+  gender: 'n/a'
+},
+{
+  name: 'Darth Vader',
+  height: '202',
+  mass: '136',
+  hair_color: 'none',
+  skin_color: 'white',
+  eye_color: 'yellow',
+  birth_year: '41.9BBY',
+  gender: 'male'
+},
+{
+  name: 'Leia Organa',
+  height: '150',
+  mass: '49',
+  hair_color: 'brown',
+  skin_color: 'light',
+  eye_color: 'brown',
+  birth_year: '19BBY',
+  gender: 'female'
+}]
+
+let findMaleAndFemale = (data) => {
+  // Solution code here...
+}
+
+// ------------------------------------------------------------------------------------------------
+// CHALLENGE 5
+
+// Write a function named findShortest that, given the Star Wars data from challenge 6,
+// uses any combination of filter, map and reduce to return the name of the shortest character.
+//
+// ------------------------------------------------------------------------------------------------
+
+let findShortest = (data) => {
+  // Solution code here...
+}
+
+// ------------------------------------------------------------------------------------------------
+// TESTS
+//
+// All the code below will verify that your functions are working to solve the challenges.
+//
+// DO NOT CHANGE any of the below code.
+//
+// Run your tests from the console: jest challenges-10.test.js
+//
+// ------------------------------------------------------------------------------------------------
+
+describe('Testing challenge 1', () => {
+  test('It should return the number of times the input is in the nested arrays', () => {
+    expect(count(5, [[1, 3, 5, 7, 9], [5, 5, 5], [1, 2, 3]])).toStrictEqual(4);
+    expect(count(3, [[1, 3, 5, 7, 9], [5, 5, 5], [1, 2, 3]])).toStrictEqual(2);
+    expect(count(12, [[1, 3, 5, 7, 9], [5, 5, 5], [1, 2, 3]])).toStrictEqual(0);
+  });
+  test('It should work on empty arrays', () => {
+    expect(count(5, [[1, 3, 5, 7, 9], [], [5, 5, 5], [1, 2, 3], []])).toStrictEqual(4);
+    expect(count(5, [])).toStrictEqual(0);
+  })
+});
+
+describe('Testing challenge 2', () => {
+  test('It should add all the numbers in the arrays', () => {
+    const nums = [[1, 2, 3, 4, 5], [6, 7, 2, 4, 5, 7],[9, 2, 3, 6, ]];
+
+    expect(totalSum(nums)).toStrictEqual(66);
+  });
+});
+
+describe('Testing challenge 3', () => {
+  test('It should return numbers divisible by five, then raise two to the power of the resulting numbers', () => {
+    expect(divisibleByFiveTwoToThePower([[10, 20, 5, 4], [5, 6, 7, 9], [1, 10, 3]])).toStrictEqual([ [ 1024, 1048576, 32 ], [ 32 ], [ 1024 ] ]);
+  });
+
+  test('It should return an empty array if none of the numbers are divisible by five', () => {
+    expect(divisibleByFiveTwoToThePower([[1, 2, 3], [5, 10 , 15]])).toStrictEqual([ [], [ 32, 1024, 32768 ] ]);
+  });
+
+  test('It should return an empty array if the values are not numbers', () => {
+    expect(divisibleByFiveTwoToThePower([['one', 'two', 'five'], ['5', '10' , '15'], [5]])).toStrictEqual([ [], [], [ 32 ] ]);
+  });
+});
+
+describe('Testing challenge 4', () => {
+  test('It should return only characters that are male or female', () => {
+    expect(findMaleAndFemale(starWarsData)).toStrictEqual('Luke Skywalker and Darth Vader and Leia Organa');
+    expect(findMaleAndFemale([{name: 'person', gender: 'female'}, {gender: 'lol'}, {name: 'persontwo', gender: 'male'}])).toStrictEqual('person and persontwo');
+  });
+});
+
+describe('Testing challenge 5', () => {
+  test('It should return the shortest character', () => {
+    expect(findShortest(starWarsData)).toStrictEqual('Leia Organa');
+  });
+});

challenges-11.test.js

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+'use strict';
+
+// ------------------------------------------------------------------------------------------------
+// CHALLENGE 1
+//
+// Write a function named validatePin that uses a regular expression pattern to validate a PIN.
+//
+// If the PIN is four numerical digits long, return true. Otherwise, return false.
+// ------------------------------------------------------------------------------------------------
+
+const validatePin = (pin) => {
+  // Solution code here...
+};
+
+// ------------------------------------------------------------------------------------------------
+// CHALLENGE 2
+//
+// Write a function named findTagNames that iterates over an array of HTML strings
+// and uses a regular expression pattern to return the closing tags.
+//
+// For example, findTagNames(['<h1>Hello, world!</h1>', '<p>Welcome to my site</p>'])
+// returns ['/h1', '/p'], and findTagNames(['<div><h1>Hello, world!</h1></div>', '<p>Welcome to my site</p>'])
+// returns ['/h1', '/div', '/p'].
+// ------------------------------------------------------------------------------------------------
+
+const findTagNames = elements => {
+  // Solution code here...
+}
+
+// ------------------------------------------------------------------------------------------------
+// CHALLENGE 3
+//
+// Write a function named validateEmail that takes in an email address and validates it based
+// on several rules:
+//   - one word, or two words separated by a period, before the @ symbol
+//   - can contain numbers
+//   - can have any of the following top-level domains: .net, .com, or .org
+//   - no other special characters
+//   - no subdomains, ports, etc: must be of the form [email protected], not [email protected]:3000
+//
+// Return either true or false.
+//
+// Note: if you ever need to validate an email using a regex in practice, the Internet has the actual
+// regex you should use. It's many many lines long.
+// ------------------------------------------------------------------------------------------------
+
+const validateEmail = (email) => {
+  // Solution code here...
+};
+
+// ------------------------------------------------------------------------------------------------
+// CHALLENGE 4
+//
+// Write a function named validatePhoneNumber that accepts a phone number and determines if it is valid.
+//
+// Acceptable formats include:
+//  - (555) 555-5555
+//  - (555)555 5555
+//  - 555 555-5555
+//  - 555-5555555
+//  - 555-555 5555
+//  - 555-555-5555
+//  - 555 555 5555
+//  - 555555-5555
+//  - 5555555555
+//
+// Your function should include a single regular expression pattern that matches any of these formats.
+//
+// Return either true or false.
+// ------------------------------------------------------------------------------------------------
+
+const validatePhoneNumber = (phoneNumber) => {
+  // Solution code here...
+};
+
+
+// ------------------------------------------------------------------------------------------------
+// TESTS
+//
+// All the code below will verify that your functions are working to solve the challenges.
+//
+// DO NOT CHANGE any of the below code.
+//
+// Run your tests from the console: jest solutions-11.test.js
+//
+// ------------------------------------------------------------------------------------------------
+
+describe('Testing challenge 1', () => {
+  test('It should validate a PIN of exactly four digits', () => {
+    expect(validatePin(1234)).toBeTruthy();
+    expect(validatePin(123)).toBeFalsy();
+    expect(validatePin(12345)).toBeFalsy();
+    expect(validatePin('abcd')).toBeFalsy();
+    expect(validatePin('7890')).toBeTruthy();
+    expect(validatePin('0789')).toBeTruthy();
+    expect(validatePin(789)).toBeFalsy();
+    expect(validatePin('0000')).toBeTruthy();
+  });
+});
+
+describe('Testing challenge 2', () => {
+  test('It should return the closing tags', () => {
+    expect(findTagNames(['<h1>Hello, world!</h1>', '<p>Welcome to my site</p>'])).toStrictEqual([ '/h1', '/p' ]);
+  });
+  test('It should work if there are multiple closing tags in a single string', () => {
+    expect(findTagNames(['<div><h1>Hello, world!</h1></div>', '<p>Welcome to my site</p>'])).toStrictEqual([ '/h1', '/div', '/p' ]);
+  });
+});
+
+describe('Testing challenge 3', () => {
+  test('It should match a basic email', () => {
+    expect(validateEmail('[email protected]')).toBeTruthy();
+  });
+
+  test('It should match if the email contains a period', () => {
+    expect(validateEmail('[email protected]')).toBeTruthy();
+  });
+
+  test('It should match if the email contains other top-level domains', () => {
+    expect(validateEmail('[email protected]')).toBeTruthy();
+  });
+
+  test('It should match if the email contains a period and other top-level domains', () => {
+    expect(validateEmail('[email protected]')).toBeTruthy();
+  });
+
+  test ('It should fail things that aren\'t email addresses', () => {
+    expect(validateEmail('justastring')).toBeFalsy();
+    expect(validateEmail('missing@adomain')).toBeFalsy();
+    expect(validateEmail('@noname.com')).toBeFalsy();
+    expect(validateEmail('[email protected]')).toBeFalsy();
+    expect(validateEmail('[email protected]')).toBeFalsy();
+    expect(validateEmail('[email protected]')).toBeFalsy();
+    expect(validateEmail('missing.atsymbol.net')).toBeFalsy();
+    expect(validateEmail('[email protected]')).toBeFalsy();
+    expect(validateEmail('[email protected]')).toBeFalsy();
+  })
+});
+
+describe('Testing challenge 4', () => {
+  test('It should match the acceptable phone number formats', () => {
+    expect(validatePhoneNumber('(555) 555-5555')).toBeTruthy();
+    expect(validatePhoneNumber('555 555-5555')).toBeTruthy();
+    expect(validatePhoneNumber('555-555-5555')).toBeTruthy();
+    expect(validatePhoneNumber('555 5555555')).toBeTruthy();
+    expect(validatePhoneNumber('5555555555')).toBeTruthy();
+    expect(validatePhoneNumber('234 567 8910')).toBeTruthy();
+  });
+  test('It should not match unacceptable phone number formats', () => {
+    expect(validatePhoneNumber('abcdefghij')).toBeFalsy();
+    expect(validatePhoneNumber('222 222 2222 ext. 2222')).toBeFalsy();
+    expect(validatePhoneNumber('(222 222-2222')).toBeFalsy();
+    expect(validatePhoneNumber('222 222-2222-')).toBeFalsy();
+    expect(validatePhoneNumber('(222 222- 2222')).toBeFalsy();
+    expect(validatePhoneNumber('(222 222 -2222')).toBeFalsy();
+    expect(validatePhoneNumber('523 555--5555')).toBeFalsy();
+    expect(validatePhoneNumber('55555555555')).toBeFalsy();
+    expect(validatePhoneNumber('55555555555')).toBeFalsy();
+    expect(validatePhoneNumber('55555555555')).toBeFalsy();
+    expect(validatePhoneNumber('55_55_5555')).toBeFalsy();
+  })
+});