Initial 7 exercises done
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@ -1,5 +1,5 @@
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const helloWorld = function() {
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const helloWorld = function() {
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return ''
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return 'Hello, World!';
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};
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};
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module.exports = helloWorld;
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module.exports = helloWorld;
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@ -1,5 +1,13 @@
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const repeatString = function() {
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const repeatString = function(str, repeatTimes) {
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if (repeatTimes < 0)
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return 'ERROR';
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let result = '';
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for (let i = 0; i < repeatTimes; i++)
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{
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result += str;
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}
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return result;
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};
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};
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// Do not edit below this line
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// Do not edit below this line
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@ -4,19 +4,19 @@ describe('repeatString', () => {
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test('repeats the string', () => {
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test('repeats the string', () => {
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expect(repeatString('hey', 3)).toEqual('heyheyhey');
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expect(repeatString('hey', 3)).toEqual('heyheyhey');
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});
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});
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test.skip('repeats the string many times', () => {
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test('repeats the string many times', () => {
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expect(repeatString('hey', 10)).toEqual('heyheyheyheyheyheyheyheyheyhey');
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expect(repeatString('hey', 10)).toEqual('heyheyheyheyheyheyheyheyheyhey');
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});
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});
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test.skip('repeats the string 1 times', () => {
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test('repeats the string 1 times', () => {
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expect(repeatString('hey', 1)).toEqual('hey');
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expect(repeatString('hey', 1)).toEqual('hey');
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});
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});
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test.skip('repeats the string 0 times', () => {
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test('repeats the string 0 times', () => {
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expect(repeatString('hey', 0)).toEqual('');
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expect(repeatString('hey', 0)).toEqual('');
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});
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});
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test.skip('returns ERROR with negative numbers', () => {
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test('returns ERROR with negative numbers', () => {
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expect(repeatString('hey', -1)).toEqual('ERROR');
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expect(repeatString('hey', -1)).toEqual('ERROR');
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});
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});
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test.skip('repeats the string a random amount of times', function () {
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test('repeats the string a random amount of times', function () {
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/*The number is generated by using Math.random to get a value from between
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/*The number is generated by using Math.random to get a value from between
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0 to 1, when this is multiplied by 1000 and rounded down with Math.floor it
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0 to 1, when this is multiplied by 1000 and rounded down with Math.floor it
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equals a number between 0 to 999 (this number will change everytime you run
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equals a number between 0 to 999 (this number will change everytime you run
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@ -31,7 +31,7 @@ describe('repeatString', () => {
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was randomaly generated. */
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was randomaly generated. */
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expect(repeatString('hey', number).match(/((hey))/g).length).toEqual(number);
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expect(repeatString('hey', number).match(/((hey))/g).length).toEqual(number);
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});
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});
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test.skip('works with blank strings', () => {
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test('works with blank strings', () => {
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expect(repeatString('', 10)).toEqual('');
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expect(repeatString('', 10)).toEqual('');
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});
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});
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});
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});
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@ -1,5 +1,10 @@
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const reverseString = function(str) {
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const reverseString = function(str) {
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if (str.length < 2)
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return str;
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const arr = str.split("");
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const reverse_arr = arr.reverse();
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return reverse_arr.join("");
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};
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};
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// Do not edit below this line
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// Do not edit below this line
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@ -5,14 +5,14 @@ describe('reverseString', () => {
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expect(reverseString('hello')).toEqual('olleh');
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expect(reverseString('hello')).toEqual('olleh');
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});
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});
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test.skip('reverses multiple words', () => {
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test('reverses multiple words', () => {
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expect(reverseString('hello there')).toEqual('ereht olleh')
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expect(reverseString('hello there')).toEqual('ereht olleh')
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})
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})
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test.skip('works with numbers and punctuation', () => {
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test('works with numbers and punctuation', () => {
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expect(reverseString('123! abc!')).toEqual('!cba !321')
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expect(reverseString('123! abc!')).toEqual('!cba !321')
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})
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})
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test.skip('works with blank strings', () => {
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test('works with blank strings', () => {
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expect(reverseString('')).toEqual('')
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expect(reverseString('')).toEqual('')
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})
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})
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});
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});
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@ -1,5 +1,12 @@
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const removeFromArray = function() {
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const removeFromArray = function(arr, ...restArg) {
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for (let i = 0; i < restArg.length; i++)
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{
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const index = arr.indexOf(restArg[i]);
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if (index > -1) {
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arr.splice(index, 1);
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}
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}
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return arr;
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};
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};
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// Do not edit below this line
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// Do not edit below this line
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@ -4,22 +4,22 @@ describe('removeFromArray', () => {
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test('removes a single value', () => {
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test('removes a single value', () => {
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expect(removeFromArray([1, 2, 3, 4], 3)).toEqual([1, 2, 4]);
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expect(removeFromArray([1, 2, 3, 4], 3)).toEqual([1, 2, 4]);
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});
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});
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test.skip('removes multiple values', () => {
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test('removes multiple values', () => {
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expect(removeFromArray([1, 2, 3, 4], 3, 2)).toEqual([1, 4]);
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expect(removeFromArray([1, 2, 3, 4], 3, 2)).toEqual([1, 4]);
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});
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});
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test.skip('ignores non present values', () => {
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test('ignores non present values', () => {
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expect(removeFromArray([1, 2, 3, 4], 7, "tacos")).toEqual([1, 2, 3, 4]);
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expect(removeFromArray([1, 2, 3, 4], 7, "tacos")).toEqual([1, 2, 3, 4]);
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});
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});
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test.skip('ignores non present values, but still works', () => {
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test('ignores non present values, but still works', () => {
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expect(removeFromArray([1, 2, 3, 4], 7, 2)).toEqual([1, 3, 4]);
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expect(removeFromArray([1, 2, 3, 4], 7, 2)).toEqual([1, 3, 4]);
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});
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});
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test.skip('can remove all values', () => {
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test('can remove all values', () => {
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expect(removeFromArray([1, 2, 3, 4], 1, 2, 3, 4)).toEqual([]);
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expect(removeFromArray([1, 2, 3, 4], 1, 2, 3, 4)).toEqual([]);
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});
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});
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test.skip('works with strings', () => {
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test('works with strings', () => {
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expect(removeFromArray(["hey", 2, 3, "ho"], "hey", 3)).toEqual([2, "ho"]);
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expect(removeFromArray(["hey", 2, 3, "ho"], "hey", 3)).toEqual([2, "ho"]);
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});
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});
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test.skip('only removes same type', () => {
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test('only removes same type', () => {
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expect(removeFromArray([1, 2, 3], "1", 3)).toEqual([1, 2]);
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expect(removeFromArray([1, 2, 3], "1", 3)).toEqual([1, 2]);
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});
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});
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});
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});
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const sumAll = function() {
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const sumAll = function(st,end) {
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if (typeof(st)!== 'number' || typeof(end) !== 'number' || st < 0 || end < 0)
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return 'ERROR';
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let sum = 0;
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for (let i = Math.min(st,end); i <= Math.max(st,end); i++)
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{
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sum += i;
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}
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return sum;
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};
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};
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// Do not edit below this line
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// Do not edit below this line
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test('sums numbers within the range', () => {
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test('sums numbers within the range', () => {
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expect(sumAll(1, 4)).toEqual(10);
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expect(sumAll(1, 4)).toEqual(10);
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});
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});
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test.skip('works with large numbers', () => {
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test('works with large numbers', () => {
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expect(sumAll(1, 4000)).toEqual(8002000);
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expect(sumAll(1, 4000)).toEqual(8002000);
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});
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});
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test.skip('works with larger number first', () => {
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test('works with larger number first', () => {
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expect(sumAll(123, 1)).toEqual(7626);
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expect(sumAll(123, 1)).toEqual(7626);
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});
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});
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test.skip('returns ERROR with negative numbers', () => {
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test('returns ERROR with negative numbers', () => {
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expect(sumAll(-10, 4)).toEqual('ERROR');
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expect(sumAll(-10, 4)).toEqual('ERROR');
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});
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});
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test.skip('returns ERROR with non-number parameters', () => {
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test('returns ERROR with non-number parameters', () => {
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expect(sumAll(10, "90")).toEqual('ERROR');
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expect(sumAll(10, "90")).toEqual('ERROR');
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});
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});
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test.skip('returns ERROR with non-number parameters', () => {
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test('returns ERROR with non-number parameters', () => {
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expect(sumAll(10, [90, 1])).toEqual('ERROR');
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expect(sumAll(10, [90, 1])).toEqual('ERROR');
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});
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});
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});
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});
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const leapYears = function() {
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const leapYears = function(year) {
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if (typeof(year) !== 'number')
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return 'ERROR';
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if((year % 4 == 0 && year % 100 != 0) || (year % 400 == 0))
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{
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return true;
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}
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else
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return false;
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};
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};
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// Do not edit below this line
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// Do not edit below this line
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test('works with non century years', () => {
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test('works with non century years', () => {
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expect(leapYears(1996)).toBe(true);
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expect(leapYears(1996)).toBe(true);
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});
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});
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test.skip('works with non century years', () => {
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test('works with non century years', () => {
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expect(leapYears(1997)).toBe(false);
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expect(leapYears(1997)).toBe(false);
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});
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});
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test.skip('works with ridiculously futuristic non century years', () => {
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test('works with ridiculously futuristic non century years', () => {
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expect(leapYears(34992)).toBe(true);
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expect(leapYears(34992)).toBe(true);
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});
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});
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test.skip('works with century years', () => {
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test('works with century years', () => {
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expect(leapYears(1900)).toBe(false);
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expect(leapYears(1900)).toBe(false);
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});
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});
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test.skip('works with century years', () => {
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test('works with century years', () => {
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expect(leapYears(1600)).toBe(true);
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expect(leapYears(1600)).toBe(true);
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});
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});
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test.skip('works with century years', () => {
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test('works with century years', () => {
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expect(leapYears(700)).toBe(false);
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expect(leapYears(700)).toBe(false);
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});
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});
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});
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});
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const ftoc = function() {
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const ftoc = function(temp) {
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if (typeof(temp) !== 'number')
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return 'ERROR';
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return Math.round( (temp-32) * 50 / 9 + Number.EPSILON) / 10;
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};
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};
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const ctof = function() {
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const ctof = function(temp) {
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if (typeof(temp) !== 'number')
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return 'ERROR';
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return Math.round((temp*9/5 + 32)*10 + Number.EPSILON) / 10;
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};
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};
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// Do not edit below this line
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test('works', () => {
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test('works', () => {
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expect(ftoc(32)).toEqual(0);
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expect(ftoc(32)).toEqual(0);
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});
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});
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test.skip('rounds to 1 decimal', () => {
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test('rounds to 1 decimal', () => {
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expect(ftoc(100)).toEqual(37.8);
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expect(ftoc(100)).toEqual(37.8);
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});
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});
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test.skip('works with negatives', () => {
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test('works with negatives', () => {
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expect(ftoc(-100)).toEqual(-73.3);
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expect(ftoc(-100)).toEqual(-73.3);
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});
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});
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});
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});
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describe('ctof', () => {
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describe('ctof', () => {
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test.skip('works', () => {
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test('works', () => {
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expect(ctof(0)).toEqual(32);
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expect(ctof(0)).toEqual(32);
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});
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});
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test.skip('rounds to 1 decimal', () => {
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test('rounds to 1 decimal', () => {
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expect(ctof(73.2)).toEqual(163.8);
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expect(ctof(73.2)).toEqual(163.8);
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});
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});
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test.skip('works with negatives', () => {
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test('works with negatives', () => {
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expect(ctof(-10)).toEqual(14);
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expect(ctof(-10)).toEqual(14);
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});
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});
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});
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});
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"eslintConfig": {
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"eslintConfig": {
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"root": true
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"root": true
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},
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},
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"jest": {
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"jest": {
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"testPathIgnorePatterns": [
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"testPathIgnorePatterns": [
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"generator-exercise/"
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"generator-exercise/"
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]
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]
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