first commit

01_helloWorld/helloWorld.js

@@ -1,5 +1,5 @@
 const helloWorld = function () {
-  return ''
+  return "Hello, World!";
 };
 
 module.exports = helloWorld;

02_repeatString/repeatString.js

@@ -1,6 +1,14 @@
-const repeatString = function() {
-
+const repeatString = function (word, times) {
+  if (times < 0) return "ERROR";
+  let myWord = "";
+  if (times > 0) {
+    for (let i = 0; i < times; i++) {
+      myWord += word;
+    }
+  }
+  return myWord;
 };
+repeatString("hey", 0);
 
 // Do not edit below this line
 module.exports = repeatString;

02_repeatString/repeatString.spec.js

@@ -1,22 +1,22 @@
-const repeatString = require('./repeatString')
+const repeatString = require("./repeatString");
 
-describe('repeatString', () => {
-  test('repeats the string', () => {
-    expect(repeatString('hey', 3)).toEqual('heyheyhey');
+describe("repeatString", () => {
+  test("repeats the string", () => {
+    expect(repeatString("hey", 3)).toEqual("heyheyhey");
   });
-  test.skip('repeats the string many times', () => {
-    expect(repeatString('hey', 10)).toEqual('heyheyheyheyheyheyheyheyheyhey');
+  test("repeats the string many times", () => {
+    expect(repeatString("hey", 10)).toEqual("heyheyheyheyheyheyheyheyheyhey");
   });
-  test.skip('repeats the string 1 times', () => {
-    expect(repeatString('hey', 1)).toEqual('hey');
+  test("repeats the string 1 times", () => {
+    expect(repeatString("hey", 1)).toEqual("hey");
   });
-  test.skip('repeats the string 0 times', () => {
-    expect(repeatString('hey', 0)).toEqual('');
+  test("repeats the string 0 times", () => {
+    expect(repeatString("hey", 0)).toEqual("");
   });
-  test.skip('returns ERROR with negative numbers', () => {
-    expect(repeatString('hey', -1)).toEqual('ERROR');
+  test("returns ERROR with negative numbers", () => {
+    expect(repeatString("hey", -1)).toEqual("ERROR");
   });
-  test.skip('repeats the string a random amount of times', function () {
+  test("repeats the string a random amount of times", function () {
     /*The number is generated by using Math.random to get a value from between
     0 to 1, when this is multiplied by 1000 and rounded down with Math.floor it 
     equals a number between 0 to 999 (this number will change everytime you run
@@ -25,13 +25,15 @@ describe('repeatString', () => {
     // DO NOT use Math.floor(Math.random() * 1000) in your code,
     // this test generates a random number, then passes it into your code with a function parameter.
     // If this doesn't make sense, you should go read about functions here: https://www.theodinproject.com/paths/foundations/courses/foundations/lessons/fundamentals-part-3
-    const number = Math.floor(Math.random() * 1000)
+    const number = Math.floor(Math.random() * 1000);
     /*The .match(/((hey))/g).length is a regex that will count the number of heys
     in the result, which if your function works correctly will equal the number that
     was randomly generated. */
-    expect(repeatString('hey', number).match(/((hey))/g).length).toEqual(number);
+    expect(repeatString("hey", number).match(/((hey))/g).length).toEqual(
+      number
+    );
   });
-  test.skip('works with blank strings', () => {
-    expect(repeatString('', 10)).toEqual('');
+  test("works with blank strings", () => {
+    expect(repeatString("", 10)).toEqual("");
   });
 });

03_reverseString/reverseString.js

@@ -1,5 +1,6 @@
-const reverseString = function() {
-
+const reverseString = function (word) {
+  const string = word.split("").reverse().join("");
+  return string;
 };
 
 // Do not edit below this line

03_reverseString/reverseString.spec.js

@@ -1,18 +1,18 @@
-const reverseString = require('./reverseString')
+const reverseString = require("./reverseString");
 
-describe('reverseString', () => {
-  test('reverses single word', () => {
-    expect(reverseString('hello')).toEqual('olleh');
+describe("reverseString", () => {
+  test("reverses single word", () => {
+    expect(reverseString("hello")).toEqual("olleh");
   });
 
-  test.skip('reverses multiple words', () => {
-    expect(reverseString('hello there')).toEqual('ereht olleh')
-  })
-
-  test.skip('works with numbers and punctuation', () => {
-    expect(reverseString('123! abc!')).toEqual('!cba !321')
-  })
-  test.skip('works with blank strings', () => {
-    expect(reverseString('')).toEqual('')
-  })
+  test("reverses multiple words", () => {
+    expect(reverseString("hello there")).toEqual("ereht olleh");
+  });
+
+  test("works with numbers and punctuation", () => {
+    expect(reverseString("123! abc!")).toEqual("!cba !321");
+  });
+  test("works with blank strings", () => {
+    expect(reverseString("")).toEqual("");
+  });
 });

04_removeFromArray/removeFromArray.js

@@ -1,5 +1,11 @@
-const removeFromArray = function() {
-
+const removeFromArray = function (array, ...members) {
+  let result = array;
+  members.map((member) => {
+    result = result.filter((i) => {
+      return member !== i;
+    });
+  });
+  return result;
 };
 
 // Do not edit below this line

04_removeFromArray/removeFromArray.spec.js

@@ -1,25 +1,25 @@
-const removeFromArray = require('./removeFromArray')
+const removeFromArray = require("./removeFromArray");
 
-describe('removeFromArray', () => {
-  test('removes a single value', () => {
+describe("removeFromArray", () => {
+  test("removes a single value", () => {
     expect(removeFromArray([1, 2, 3, 4], 3)).toEqual([1, 2, 4]);
   });
-  test.skip('removes multiple values', () => {
+  test("removes multiple values", () => {
     expect(removeFromArray([1, 2, 3, 4], 3, 2)).toEqual([1, 4]);
   });
-  test.skip('ignores non present values', () => {
+  test("ignores non present values", () => {
     expect(removeFromArray([1, 2, 3, 4], 7, "tacos")).toEqual([1, 2, 3, 4]);
   });
-  test.skip('ignores non present values, but still works', () => {
+  test("ignores non present values, but still works", () => {
     expect(removeFromArray([1, 2, 3, 4], 7, 2)).toEqual([1, 3, 4]);
   });
-  test.skip('can remove all values', () => {
+  test("can remove all values", () => {
     expect(removeFromArray([1, 2, 3, 4], 1, 2, 3, 4)).toEqual([]);
   });
-  test.skip('works with strings', () => {
+  test("works with strings", () => {
     expect(removeFromArray(["hey", 2, 3, "ho"], "hey", 3)).toEqual([2, "ho"]);
   });
-  test.skip('only removes same type', () => {
+  test("only removes same type", () => {
     expect(removeFromArray([1, 2, 3], "1", 3)).toEqual([1, 2]);
   });
 });

05_sumAll/sumAll.js

@@ -1,5 +1,21 @@
-const sumAll = function() {
+const sumAll = function (num1, num2) {
+  let result = 0;
+  //   if (num1.typeof !== "number" || num2.typeof !== "number") return "ERROR";
+  if (!Number.isInteger(num1) || !Number.isInteger(num2)) return "ERROR";
 
+  if (num1 < 0 || num2 < 0) {
+    result = "ERROR";
+  } else if (num1 > num2) {
+    for (let i = num2; i <= num1; i++) {
+      result += i;
+    }
+  } else if (num1 < num2) {
+    for (let i = num1; i <= num2; i++) {
+      result += i;
+    }
+  }
+
+  return result;
 };
 
 // Do not edit below this line

05_sumAll/sumAll.spec.js

@@ -1,22 +1,22 @@
-const sumAll = require('./sumAll')
+const sumAll = require("./sumAll");
 
-describe('sumAll', () => {
-  test('sums numbers within the range', () => {
+describe("sumAll", () => {
+  test("sums numbers within the range", () => {
     expect(sumAll(1, 4)).toEqual(10);
   });
-  test.skip('works with large numbers', () => {
+  test("works with large numbers", () => {
     expect(sumAll(1, 4000)).toEqual(8002000);
   });
-  test.skip('works with larger number first', () => {
+  test("works with larger number first", () => {
     expect(sumAll(123, 1)).toEqual(7626);
   });
-  test.skip('returns ERROR with negative numbers', () => {
-    expect(sumAll(-10, 4)).toEqual('ERROR');
+  test("returns ERROR with negative numbers", () => {
+    expect(sumAll(-10, 4)).toEqual("ERROR");
   });
-  test.skip('returns ERROR with non-number parameters', () => {
-    expect(sumAll(10, "90")).toEqual('ERROR');
+  test("returns ERROR with non-number parameters", () => {
+    expect(sumAll(10, "90")).toEqual("ERROR");
   });
-  test.skip('returns ERROR with non-number parameters', () => {
-    expect(sumAll(10, [90, 1])).toEqual('ERROR');
+  test("returns ERROR with non-number parameters", () => {
+    expect(sumAll(10, [90, 1])).toEqual("ERROR");
   });
 });

06_leapYears/leapYears.js

@@ -1,5 +1,12 @@
-const leapYears = function() {
-
+const leapYears = function (year) {
+  if (year % 4 === 0 || year % 400 === 0) {
+    if (year % 100 === 0 && year % 400 !== 0) {
+      return false;
+    }
+    return true;
+  } else {
+    return false;
+  }
 };
 
 // Do not edit below this line

06_leapYears/leapYears.spec.js

@@ -1,22 +1,22 @@
-const leapYears = require('./leapYears')
+const leapYears = require("./leapYears");
 
-describe('leapYears', () => {
-  test('works with non century years', () => {
+describe("leapYears", () => {
+  test("works with non century years", () => {
     expect(leapYears(1996)).toBe(true);
   });
-  test.skip('works with non century years', () => {
+  test("works with non century years", () => {
     expect(leapYears(1997)).toBe(false);
   });
-  test.skip('works with ridiculously futuristic non century years', () => {
+  test("works with ridiculously futuristic non century years", () => {
     expect(leapYears(34992)).toBe(true);
   });
-  test.skip('works with century years', () => {
+  test("works with century years", () => {
     expect(leapYears(1900)).toBe(false);
   });
-  test.skip('works with century years', () => {
+  test("works with century years", () => {
     expect(leapYears(1600)).toBe(true);
   });
-  test.skip('works with century years', () => {
+  test("works with century years", () => {
     expect(leapYears(700)).toBe(false);
   });
 });

07_tempConversion/tempConversion.js

@@ -1,11 +1,17 @@
-const convertToCelsius = function() {
+const convertToCelsius = function (fahrenheit) {
+  let result = (fahrenheit - 32) * (5 / 9);
+  result = Math.round(result * 10) / 10;
+  return result;
 };
 
-const convertToFahrenheit = function() {
+const convertToFahrenheit = function (celsius) {
+  let result = celsius * (9 / 5) + 32;
+  result = Math.round(result * 10) / 10;
+  return result;
 };
 
 // Do not edit below this line
 module.exports = {
   convertToCelsius,
-  convertToFahrenheit
+  convertToFahrenheit,
 };

07_tempConversion/tempConversion.spec.js

@@ -1,25 +1,25 @@
-const {convertToCelsius, convertToFahrenheit} = require('./tempConversion')
+const { convertToCelsius, convertToFahrenheit } = require("./tempConversion");
 
-describe('convertToCelsius', () => {
-  test('works', () => {
+describe("convertToCelsius", () => {
+  test("works", () => {
     expect(convertToCelsius(32)).toEqual(0);
   });
-  test.skip('rounds to 1 decimal', () => {
+  test("rounds to 1 decimal", () => {
     expect(convertToCelsius(100)).toEqual(37.8);
   });
-  test.skip('works with negatives', () => {
+  test("works with negatives", () => {
     expect(convertToCelsius(-100)).toEqual(-73.3);
   });
 });
 
-describe('convertToFahrenheit', () => {
-  test.skip('works', () => {
+describe("convertToFahrenheit", () => {
+  test("works", () => {
     expect(convertToFahrenheit(0)).toEqual(32);
   });
-  test.skip('rounds to 1 decimal', () => {
+  test("rounds to 1 decimal", () => {
     expect(convertToFahrenheit(73.2)).toEqual(163.8);
   });
-  test.skip('works with negatives', () => {
+  test("works with negatives", () => {
     expect(convertToFahrenheit(-10)).toEqual(14);
   });
 });

08_calculator/calculator.js

@@ -1,25 +1,39 @@
-const add = function() {
-	
+const add = function (num1, num2) {
+  return num1 + num2;
 };
 
-const subtract = function() {
-	
+const subtract = function (num1, num2) {
+  return num1 - num2;
 };
 
-const sum = function() {
-	
+const sum = function (array) {
+  let result = 0;
+  array.map((i) => {
+    result += i;
+  });
+  return result;
 };
 
-const multiply = function() {
-
+const multiply = function (array) {
+  let result = 0;
+  array.reduce((acc, val) => {
+    return (result = acc * val);
+  });
+  return result;
 };
 
-const power = function() {
-	
+const power = function (num1, num2) {
+  return Math.pow(num1, num2);
 };
 
-const factorial = function() {
-	
+const factorial = function (number) {
+  if (number === 0) {
+    return 1;
+  } else if (number === 1) {
+    return 1;
+  } else {
+    return number * factorial(number - 1);
+  }
 };
 
 // Do not edit below this line
@@ -29,5 +43,5 @@ module.exports = {
   sum,
   multiply,
   power,
-  factorial
+  factorial,
 };

08_calculator/calculator.spec.js

@@ -1,77 +1,77 @@
-const calculator = require('./calculator');
+const calculator = require("./calculator");
 
-describe('add', () => {
-  test('adds 0 and 0', () => {
+describe("add", () => {
+  test("adds 0 and 0", () => {
     expect(calculator.add(0, 0)).toBe(0);
   });
 
-  test.skip('adds 2 and 2', () => {
+  test("adds 2 and 2", () => {
     expect(calculator.add(2, 2)).toBe(4);
   });
 
-  test.skip('adds positive numbers', () => {
+  test("adds positive numbers", () => {
     expect(calculator.add(2, 6)).toBe(8);
   });
 });
 
-describe('subtract', () => {
-  test.skip('subtracts numbers', () => {
+describe("subtract", () => {
+  test("subtracts numbers", () => {
     expect(calculator.subtract(10, 4)).toBe(6);
   });
 });
 
-describe('sum', () => {
-  test.skip('computes the sum of an empty array', () => {
+describe("sum", () => {
+  test("computes the sum of an empty array", () => {
     expect(calculator.sum([])).toBe(0);
   });
 
-  test.skip('computes the sum of an array of one number', () => {
+  test("computes the sum of an array of one number", () => {
     expect(calculator.sum([7])).toBe(7);
   });
 
-  test.skip('computes the sum of an array of two numbers', () => {
+  test("computes the sum of an array of two numbers", () => {
     expect(calculator.sum([7, 11])).toBe(18);
   });
 
-  test.skip('computes the sum of an array of many numbers', () => {
+  test("computes the sum of an array of many numbers", () => {
     expect(calculator.sum([1, 3, 5, 7, 9])).toBe(25);
   });
 });
 
-describe('multiply', () => {
-  test.skip('multiplies two numbers', () => {
+describe("multiply", () => {
+  test("multiplies two numbers", () => {
     expect(calculator.multiply([2, 4])).toBe(8);
   });
 
-  test.skip('multiplies several numbers', () => {
+  test("multiplies several numbers", () => {
     expect(calculator.multiply([2, 4, 6, 8, 10, 12, 14])).toBe(645120);
   });
 });
 
-describe('power', () => {
-  test.skip('raises one number to the power of another number', () => {
+describe("power", () => {
+  test("raises one number to the power of another number", () => {
     expect(calculator.power(4, 3)).toBe(64); // 4 to third power is 64
   });
 });
 
-describe('factorial', () => {
-  test.skip('computes the factorial of 0', () => {
+describe("factorial", () => {
+  test("computes the factorial of 0", () => {
     expect(calculator.factorial(0)).toBe(1); // 0! = 1
   });
 
-  test.skip('computes the factorial of 1', () => {
+  test("computes the factorial of 1", () => {
     expect(calculator.factorial(1)).toBe(1);
   });
 
-  test.skip('computes the factorial of 2', () => {
+  test("computes the factorial of 2", () => {
     expect(calculator.factorial(2)).toBe(2);
   });
 
-  test.skip('computes the factorial of 5', () => {
+  test("computes the factorial of 5", () => {
     expect(calculator.factorial(5)).toBe(120);
   });
 
-  test.skip('computes the factorial of 10', () => {
+  test("computes the factorial of 10", () => {
     expect(calculator.factorial(10)).toBe(3628800);
   });
 });

09_palindromes/palindromes.js

@@ -1,5 +1,24 @@
-const palindromes = function () {
-
+const palindromes = function (string) {
+  let result = string
+    .toUpperCase()
+    .replace(/[_\W]+/g, "")
+    .split(" ")
+    .join("")
+    .split("")
+    .join("");
+  let reverseResult = string
+    .toUpperCase()
+    .replace(/[_\W]+/g, "")
+    .split(" ")
+    .join("")
+    .split("")
+    .reverse()
+    .join("");
+  if (result === reverseResult) {
+    return true;
+  } else {
+    return false;
+  }
 };
 
 // Do not edit below this line

09_palindromes/palindromes.spec.js

@@ -1,28 +1,30 @@
-const palindromes = require('./palindromes')
+const palindromes = require("./palindromes");
 
-describe('palindromes', () => {
-  test('works with single words', () => {
-    expect(palindromes('racecar')).toBe(true);
+describe("palindromes", () => {
+  test("works with single words", () => {
+    expect(palindromes("racecar")).toBe(true);
   });
-  test.skip('works with punctuation ', () => {
-    expect(palindromes('racecar!')).toBe(true);
+  test("works with punctuation ", () => {
+    expect(palindromes("racecar!")).toBe(true);
   });
-  test.skip('works with upper-case letters ', () => {
-    expect(palindromes('Racecar!')).toBe(true);
+  test("works with upper-case letters ", () => {
+    expect(palindromes("Racecar!")).toBe(true);
   });
-  test.skip('works with multiple words', () => {
-    expect(palindromes('A car, a man, a maraca.')).toBe(true);
+  test("works with multiple words", () => {
+    expect(palindromes("A car, a man, a maraca.")).toBe(true);
   });
-  test.skip('works with multiple words', () => {
-    expect(palindromes('Animal loots foliated detail of stool lamina.')).toBe(true);
+  test("works with multiple words", () => {
+    expect(palindromes("Animal loots foliated detail of stool lamina.")).toBe(
+      true
+    );
   });
-  test.skip('doesn\'t just always return true', () => {
-    expect(palindromes('ZZZZ car, a man, a maracaz.')).toBe(false);
+  test("doesn't just always return true", () => {
+    expect(palindromes("ZZZZ car, a man, a maracaz.")).toBe(false);
   });
-  test.skip('works with numbers in a string', () => {
-    expect(palindromes('rac3e3car')).toBe(true);
+  test("works with numbers in a string", () => {
+    expect(palindromes("rac3e3car")).toBe(true);
   });
-  test.skip('works with unevenly spaced numbers in a string', () => {
-    expect(palindromes('r3ace3car')).toBe(false);
+  test("works with unevenly spaced numbers in a string", () => {
+    expect(palindromes("r3ace3car")).toBe(false);
   });
 });

11_getTheTitles/getTheTitles.js

@@ -1,5 +1,9 @@
-const getTheTitles = function() {
-
+const getTheTitles = function (array) {
+  let result = [];
+  array.map((obj) => {
+    result.push(obj.title);
+  });
+  return result;
 };
 
 // Do not edit below this line

11_getTheTitles/getTheTitles.spec.js

@@ -1,18 +1,18 @@
-const getTheTitles = require('./getTheTitles')
+const getTheTitles = require("./getTheTitles");
 
-describe('getTheTitles', () => {
+describe("getTheTitles", () => {
   const books = [
     {
-        title: 'Book',
-        author: 'Name'
+      title: "Book",
+      author: "Name",
     },
     {
-        title: 'Book2',
-        author: 'Name2'
-      }
-    ]
+      title: "Book2",
+      author: "Name2",
+    },
+  ];
 
-  test('gets titles', () => {
-    expect(getTheTitles(books)).toEqual(['Book','Book2']);
+  test("gets titles", () => {
+    expect(getTheTitles(books)).toEqual(["Book", "Book2"]);
   });
 });

12_findTheOldest/findTheOldest.js

@@ -1,5 +1,16 @@
-const findTheOldest = function() {
+const findTheOldest = function (array) {
+  return array.reduce((prev, curr) => {
+    const prevAge = getAge(prev.yearOfBirth, prev.yearOfDeath);
+    const currentAge = getAge(curr.yearOfBirth, curr.yearOfDeath);
+    return prevAge < currentAge ? curr : prev;
+  });
+};
 
+const getAge = function (birth, death) {
+  if (!death) {
+    death = new Date().getFullYear();
+  }
+  return death - birth;
 };
 
 // Do not edit below this line

12_findTheOldest/findTheOldest.spec.js

@@ -1,7 +1,7 @@
-const findTheOldest = require('./findTheOldest')
+const findTheOldest = require("./findTheOldest");
 
-describe('findTheOldest', () => {
-  test('finds the person with the greatest age!', () => {
+describe("findTheOldest", () => {
+  test("finds the person with the greatest age!", () => {
     const people = [
       {
         name: "Carly",
@@ -18,10 +18,10 @@ describe('findTheOldest', () => {
         yearOfBirth: 1912,
         yearOfDeath: 1941,
       },
-    ]
-    expect(findTheOldest(people).name).toBe('Ray');
+    ];
+    expect(findTheOldest(people).name).toBe("Ray");
   });
-  test.skip('finds the person with the greatest age if someone is still living', () => {
+  test("finds the person with the greatest age if someone is still living", () => {
     const people = [
       {
         name: "Carly",
@@ -37,10 +37,10 @@ describe('findTheOldest', () => {
         yearOfBirth: 1912,
         yearOfDeath: 1941,
       },
-    ]
-    expect(findTheOldest(people).name).toBe('Ray');
+    ];
+    expect(findTheOldest(people).name).toBe("Ray");
   });
-  test.skip('finds the person with the greatest age if the OLDEST is still living', () => {
+  test("finds the person with the greatest age if the OLDEST is still living", () => {
     const people = [
       {
         name: "Carly",
@@ -56,7 +56,7 @@ describe('findTheOldest', () => {
         yearOfBirth: 1912,
         yearOfDeath: 1941,
       },
-    ]
-    expect(findTheOldest(people).name).toBe('Carly');
+    ];
+    expect(findTheOldest(people).name).toBe("Carly");
   });
 });