ex

caesar/caesar.js

@@ -1,5 +1,22 @@
-const caesar = function() {
+const caesar = function (str, num) {
+    num = num%25;
+    return str.split('').map(x => {
+        if(x == ','
+            || x == '!'
+            || x == ' '){return x}
+        let asciNum = wrap(Number(x.charCodeAt()) + num);
+        return String.fromCharCode(asciNum)
+    }).join('');
+}
 
+function wrap(num){
+    if (num < 97 && num > 90){
+        return num = num%90 + 64;
+    }else if(num > 122){
+        return num = num % 122 + 96;
+    } else { 
+        return num;
+    }
 }
 
 module.exports = caesar

caesar/caesar.spec.js

@@ -4,19 +4,19 @@ describe('caesar', function() {
   it('works with single letters', function() {
     expect(caesar('A', 1)).toEqual('B');
   });
-  xit('works with words', function() {
+  it('works with words', function() {
     expect(caesar('Aaa', 1)).toEqual('Bbb');
   });
-  xit('works with phrases', function() {
+  it('works with phrases', function() {
     expect(caesar('Hello, World!', 5)).toEqual('Mjqqt, Btwqi!');
   });
   xit('works with negative shift', function() {
     expect(caesar('Mjqqt, Btwqi!', -5)).toEqual('Hello, World!');
   });
-  xit('wraps', function() {
+  it('wraps', function() {
     expect(caesar('Z', 1)).toEqual('A');
   });
-  xit('works with large shift factors', function() {
+  it('works with large shift factors', function() {
     expect(caesar('Hello, World!', 75)).toEqual('Ebiil, Tloia!');
   });
   xit('works with large negative shift factors', function() {

calculator/calculator.js

@@ -1,25 +1,27 @@
-function add () {
-	
+function add (a, b) {
+	return a+b;
 }
 
-function subtract () {
-	
+function subtract(a, b) {
+	return a - b;
 }
 
-function sum () {
-	
+function sum(arr) {
+	if (arr.length <1){return 0}
+	if (arr.length == 1) { return arr[0] }
+	return arr.reduce((a,b) => a+b);
 }
 
-function multiply () {
-	
+function multiply(arr) {
+	return arr.reduce((a, b) => a * b);
 }
 
-function power() {
-	
+function power(a, b) {
+	return Math.pow(a, b);
 }
 
-function factorial() {
-	
+function factorial(a) {
+	return a < 2 ? 1 : a * factorial(a - 1)
 }
 
 module.exports = {

calculator/calculator.spec.js

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

fibonacci/fibonacci.js

@@ -1,5 +1,12 @@
-const fibonacci = function() {
-
+const fibonacci = function (num) {
+    if (num < 0) { return "OOPS"}
+    let sum = [];
+    sum[0] = 0;
+    sum[1] = 1;
+    for (let i = 2; i <= num; i++) {
+        sum[i] = sum[i - 1] + sum[i - 2];
+    }
+    return sum[num];
 }
 
 module.exports = fibonacci

fibonacci/fibonacci.spec.js

@@ -4,28 +4,28 @@ describe('fibonacci', function() {
   it('works', function() {
     expect(fibonacci(4)).toEqual(3);
   });
-  xit('works', function() {
+  it('works', function() {
     expect(fibonacci(6)).toEqual(8);
   });
-  xit('works', function() {
+  it('works', function() {
     expect(fibonacci(10)).toEqual(55);
   });
-  xit('works', function() {
+  it('works', function() {
     expect(fibonacci(15)).toEqual(610);
   });
-  xit('works', function() {
+  it('works', function() {
     expect(fibonacci(25)).toEqual(75025);
   });
-  xit('doesn\'t accept negatives', function() {
+  it('doesn\'t accept negatives', function() {
     expect(fibonacci(-25)).toEqual("OOPS");
   });
-  xit('DOES accept strings', function() {
+  it('DOES accept strings', function() {
     expect(fibonacci("1")).toEqual(1);
   });
-  xit('DOES accept strings', function() {
+  it('DOES accept strings', function() {
     expect(fibonacci("2")).toEqual(1);
   });
-  xit('DOES accept strings', function() {
+  it('DOES accept strings', function() {
     expect(fibonacci("8")).toEqual(21);
   });
 });

findTheOldest/findTheOldest.js

@@ -1,5 +1,20 @@
-let findTheOldest = function() {
-
+let findTheOldest = function (arr) {
+    let biggest = -Infinity;
+    let age;
+    let oldest = {name: ''};
+    arr.map(x => {
+        if (x.yearOfDeath === undefined) {
+            age = 2020 - x.yearOfBirth
+        } else {
+            age = x.yearOfDeath - x.yearOfBirth
+        }
+        if (age > biggest) {
+            biggest = age;
+            oldest.name = x.name;
+            return biggest;
+        }
+    });
+    return oldest;
 }
 
 module.exports = findTheOldest

findTheOldest/findTheOldest.spec.js

@@ -21,7 +21,7 @@ describe('findTheOldest', function() {
     ]
     expect(findTheOldest(people).name).toEqual('Ray');
   });
-  xit('finds the oldest person if someone is still living', function() {
+  it('finds the oldest person if someone is still living', function() {
     const people = [
       {
         name: 'Carly',
@@ -40,7 +40,7 @@ describe('findTheOldest', function() {
     ]
     expect(findTheOldest(people).name).toEqual('Ray');
   });
-  xit('finds the oldest person if the OLDEST is still living', function() {
+  it('finds the oldest person if the OLDEST is still living', function() {
     const people = [
       {
         name: 'Carly',

getTheTitles/getTheTitles.js

@@ -1,5 +1,9 @@
-const getTheTitles = function() {
-
+const getTheTitles = function(arr) {
+    let newArr = [];
+    arr.map(x=> {
+        newArr.push(x.title)
+    });
+    return newArr;
 }
 
 module.exports = getTheTitles;

helloWorld/helloWorld.js

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

leapYears/leapYears.js

@@ -1,5 +1,16 @@
-const leapYears = function() {
-
+const leapYears = function(year) {
+    if(year%100 == 0){
+        if ((year / 100) % 4 == 0) {
+            return true;
+        } else {
+            return false;
+        }
+    }
+    if ( year%4 == 0){
+        return true;
+    }else {
+        return false;
+    }
 }
 
 module.exports = leapYears

leapYears/leapYears.spec.js

@@ -4,19 +4,19 @@ describe('leapYears', function() {
   it('works with non century years', function() {
     expect(leapYears(1996)).toEqual(true);
   });
-  xit('works with non century years', function() {
+  it('works with non century years', function() {
     expect(leapYears(1997)).toEqual(false);
   });
-  xit('works with ridiculously futuristic non century years', function() {
+  it('works with ridiculously futuristic non century years', function() {
     expect(leapYears(34992)).toEqual(true);
   });
-  xit('works with century years', function() {
+  it('works with century years', function() {
     expect(leapYears(1900)).toEqual(false);
   });
-  xit('works with century years', function() {
+  it('works with century years', function() {
     expect(leapYears(1600)).toEqual(true);
   });
-  xit('works with century years', function() {
+  it('works with century years', function() {
     expect(leapYears(700)).toEqual(false);
   });
 });

removeFromArray/removeFromArray.js

@@ -1,5 +1,10 @@
-const removeFromArray = function() {
+const removeFromArray = function (arr, ...indx) {
+    indx.map(x => {
+        if (arr.indexOf(x) == -1){ return x}
+        arr.splice(arr.indexOf(x), 1);
+    })
     
+    return arr;
 }
 
 module.exports = removeFromArray

removeFromArray/removeFromArray.spec.js

@@ -4,19 +4,19 @@ describe('removeFromArray', function() {
   it('removes a single value', function() {
     expect(removeFromArray([1, 2, 3, 4], 3)).toEqual([1, 2, 4]);
   });
-  xit('removes multiple values', function() {
+  it('removes multiple values', function() {
     expect(removeFromArray([1, 2, 3, 4], 3, 2)).toEqual([1, 4]);
   });
-  xit('ignores non present values', function() {
+  it('ignores non present values', function() {
     expect(removeFromArray([1, 2, 3, 4], 7, "tacos")).toEqual([1, 2, 3, 4]);
   });
-  xit('ignores non present values, but still works', function() {
+  it('ignores non present values, but still works', function() {
     expect(removeFromArray([1, 2, 3, 4], 7, 2)).toEqual([1, 3, 4]);
   });
-  xit('can remove all values', function() {
+  it('can remove all values', function() {
     expect(removeFromArray([1, 2, 3, 4], 1, 2, 3, 4)).toEqual([]);
   });
-  xit('works with strings', function() {
+  it('works with strings', function() {
     expect(removeFromArray(["hey", 2, 3, "ho"], "hey", 3)).toEqual([2, "ho"]);
   });
 });

repeatString/repeatString.js

@@ -1,5 +1,6 @@
-const repeatString = function() {
-
+const repeatString = function(str, num) {
+    if (num < 0) { return 'ERROR'};
+    return str.repeat(num);
 }
 
 module.exports = repeatString

repeatString/repeatString.spec.js

@@ -4,16 +4,16 @@ describe('repeatString', function() {
   it('repeats the string', function() {
     expect(repeatString('hey', 3)).toEqual('heyheyhey');
   });
-  xit('repeats the string many times', function() {
+  it('repeats the string many times', function() {
     expect(repeatString('hey', 10)).toEqual('heyheyheyheyheyheyheyheyheyhey');
   });
-  xit('repeats the string 1 times', function() {
+  it('repeats the string 1 times', function() {
     expect(repeatString('hey', 1)).toEqual('hey');
   });
-  xit('repeats the string 0 times', function() {
+  it('repeats the string 0 times', function() {
     expect(repeatString('hey', 0)).toEqual('');
   });
-  xit('returns ERROR with negative numbers', function() {
+  it('returns ERROR with negative numbers', function() {
     expect(repeatString('hey', -1)).toEqual('ERROR');
   });
 });

reverseString/reverseString.js

@@ -1,5 +1,5 @@
-const reverseString = function() {
-
+const reverseString = function(str) {
+    return str.split('').reverse().join('');
 }
 
 module.exports = reverseString

reverseString/reverseString.spec.js

@@ -5,11 +5,11 @@ describe('reverseString', function() {
     expect(reverseString('hello')).toEqual('olleh');
   });
 
-  xit('reverses multiple words', function() {
+  it('reverses multiple words', function() {
     expect(reverseString('hello there')).toEqual('ereht olleh')
   })
 
-  xit('works with numbers and punctuation', function() {
+  it('works with numbers and punctuation', function() {
     expect(reverseString('123! abc!')).toEqual('!cba !321')
   })
 });

sumAll/sumAll.js

@@ -1,5 +1,14 @@
-const sumAll = function() {
-
+const sumAll = function (first, last) {
+    if (first < 0) { return 'ERROR' }
+    if (typeof first !== 'number' || typeof last !== 'number') { return 'ERROR' }
+    first = Number(first);
+    last = Number(last);
+    let arr = [first,last].sort();
+    let sum = 0;
+    for (arr[0]; arr[0] <= arr[1]; arr[0]++) {
+        sum = Number(sum) + arr[0]
+    }
+    return sum;
 }
 
 module.exports = sumAll

sumAll/sumAll.spec.js

@@ -4,19 +4,19 @@ describe('sumAll', function() {
   it('sums numbers within the range', function() {
     expect(sumAll(1, 4)).toEqual(10);
   });
-  xit('works with large numbers', function() {
+  it('works with large numbers', function() {
     expect(sumAll(1, 4000)).toEqual(8002000);
   });
-  xit('works with larger number first', function() {
+  it('works with larger number first', function() {
     expect(sumAll(123, 1)).toEqual(7626);
   });
-  xit('returns ERROR with negative numbers', function() {
+  it('returns ERROR with negative numbers', function() {
     expect(sumAll(-10, 4)).toEqual('ERROR');
   });
-  xit('returns ERROR with non-number parameters', function() {
+  it('returns ERROR with non-number parameters', function() {
     expect(sumAll(10, "90")).toEqual('ERROR');
   });
-  xit('returns ERROR with non-number parameters', function() {
+  it('returns ERROR with non-number parameters', function() {
     expect(sumAll(10, [90, 1])).toEqual('ERROR');
   });
 });