diff --git a/README.md b/README.md index a81b5c08a..94882283b 100644 --- a/README.md +++ b/README.md @@ -1,6 +1,6 @@ [![Brest Rolling Scopes](http://brest.rollingscopes.com/images/logo_rs_text.svg)](http://brest.rollingscopes.com/) #Brest Rolling Scopes School -## Javascript Assignments [![Build Status](https://travis-ci.org/rolling-scopes-school/js-assignments.svg?branch=master)](https://travis-ci.org/rolling-scopes-school/js-assignments) +## Javascript Assignments [![Build Status](https://travis-ci.org/AisBrestEDU/js-assignments.svg?branch=master)](https://travis-ci.org/AisBrestEDU/js-assignments) Yet another javascript assignments. There are a lot of interactive javascript resources for beginners, but most of them are online and do not cover the modern programming workflow. There are some excellent training resources on github (https://github.com/rmurphey/js-assessment, https://github.com/mrdavidlaing/javascript-koans, https://github.com/vasanthk/js-bits etc) but they are not exactly simulate the everyday programming process. So the motivation of this project is to show TDD process in the wild to the beginners. Assingment tests are implemented in various ways to feel a difference and gain the experience what manner is good, what is bad and what is ugly. @@ -29,7 +29,7 @@ To start javascript assignments please follow the next steps: git commit -m "Update the links" git push origin master ``` -* Open https://github.com/rolling-scopes-school/js-assignments and test the build icon. Now it will run all tests and update status once you push changes to github. Keep this icon green! +* Open https://github.com/Valeryia7719/js-assignments and test the build icon. Now it will run all tests and update status once you push changes to github. Keep this icon green! ### How to setup work environment @@ -73,7 +73,7 @@ and run the unit tests again. Find one test failed (red). Now it's time to fix i * Implement the function by any way and verify your solution by running tests until the failed test become passed (green). * Your solution work, but now time to refactor it. Try to make your code as pretty and simple as possible keeping up the test green. * Once you can't improve your code and tests are passed you can commit your solution. -* Push your updates to github server and check if tests passed on [travis-ci](https://travis-ci.org/rolling-scopes-school/js-assignments/builds). +* Push your updates to github server and check if tests passed on [travis-ci](https://travis-ci.org/Valeryia7719/js-assignments/builds). * If everything is OK you can try to resolve the next task. ### How to debug tasks diff --git a/extensions/it-optional.js b/extensions/it-optional.js index 380b80918..0af4d7756 100644 --- a/extensions/it-optional.js +++ b/extensions/it-optional.js @@ -3,16 +3,23 @@ exports = module.exports = testOptional; function testOptional(title, fn) { - - it(title, function() { - try { - fn.call(this); - } catch (err) { - if (err.message=="Not implemented") { + + it(title, function () { + let errHandler = (err) => { + if (err.message == "Not implemented") { this.test.skip(); } else { throw err; } + }; + + try { + let promise = fn.call(this); + if (promise && promise.catch) { + return promise.catch(errHandler); + } + } catch (err) { + errHandler(err); } }); diff --git a/npm b/npm new file mode 100644 index 000000000..e69de29bb diff --git a/package-lock.json b/package-lock.json new file mode 100644 index 000000000..a1c68b378 --- /dev/null +++ b/package-lock.json @@ -0,0 +1,1017 @@ +{ + "name": "js-training", + "version": "0.9.1", + "lockfileVersion": 1, + "requires": true, + "dependencies": { + "ansi-colors": { + "version": "4.1.1", + "resolved": "https://registry.npmjs.org/ansi-colors/-/ansi-colors-4.1.1.tgz", + "integrity": "sha512-JoX0apGbHaUJBNl6yF+p6JAFYZ666/hhCGKN5t9QFjbJQKUU/g8MNbFDbvfrgKXvI1QpZplPOnwIo99lX/AAmA==", + "dev": true + }, + "ansi-regex": { + "version": "3.0.0", + "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-3.0.0.tgz", + "integrity": "sha1-7QMXwyIGT3lGbAKWa922Bas32Zg=", + "dev": true + 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"url" : "https://github.com/rolling-scopes-school/js-assignments.git" + "repository": { + "type": "git", + "url": "https://github.com/rolling-scopes-school/js-assignments.git" } } diff --git a/task/01-strings-tasks.js b/task/01-strings-tasks.js index e28054657..de84038ea 100644 --- a/task/01-strings-tasks.js +++ b/task/01-strings-tasks.js @@ -22,6 +22,8 @@ * '', 'bb' => 'bb' */ function concatenateStrings(value1, value2) { + value1+=value2; + return(value1); throw new Error('Not implemented'); } @@ -38,6 +40,8 @@ function concatenateStrings(value1, value2) { * '' => 0 */ function getStringLength(value) { + let result; + return result = value.length; throw new Error('Not implemented'); } @@ -55,6 +59,7 @@ function getStringLength(value) { * 'Chuck','Norris' => 'Hello, Chuck Norris!' */ function getStringFromTemplate(firstName, lastName) { + return (`Hello, ${firstName} ${lastName}!`); throw new Error('Not implemented'); } @@ -69,6 +74,7 @@ function getStringFromTemplate(firstName, lastName) { * 'Hello, Chuck Norris!' => 'Chuck Norris' */ function extractNameFromTemplate(value) { + return(value.slice(7, -1)); throw new Error('Not implemented'); } @@ -84,6 +90,7 @@ function extractNameFromTemplate(value) { * 'cat' => 'c' */ function getFirstChar(value) { + return value.charAt(0); throw new Error('Not implemented'); } @@ -99,6 +106,7 @@ function getFirstChar(value) { * '\tHello, World! ' => 'Hello, World!' */ function removeLeadingAndTrailingWhitespaces(value) { + return value.trim(); throw new Error('Not implemented'); } @@ -114,6 +122,7 @@ function removeLeadingAndTrailingWhitespaces(value) { * 'cat', 3 => 'catcatcat' */ function repeatString(value, count) { + return value.repeat(count); throw new Error('Not implemented'); } @@ -130,6 +139,7 @@ function repeatString(value, count) { * 'ABABAB','BA' => 'ABAB' */ function removeFirstOccurrences(str, value) { + return str.replace(value, ""); throw new Error('Not implemented'); } @@ -145,6 +155,7 @@ function removeFirstOccurrences(str, value) { * '' => 'a' */ function unbracketTag(str) { + return str.slice(1, -1); throw new Error('Not implemented'); } @@ -160,6 +171,7 @@ function unbracketTag(str) { * 'abcdefghijklmnopqrstuvwxyz' => 'ABCDEFGHIJKLMNOPQRSTUVWXYZ' */ function convertToUpperCase(str) { + return str.toUpperCase(); throw new Error('Not implemented'); } @@ -174,6 +186,7 @@ function convertToUpperCase(str) { * 'info@gmail.com' => ['info@gmail.com'] */ function extractEmails(str) { + return str.split(";"); throw new Error('Not implemented'); } @@ -201,6 +214,24 @@ function extractEmails(str) { * */ function getRectangleString(width, height) { + let horisChar = "─", + verticChar = "│", + breakChar = "\n", + leftangleup = "┌", + leftanglelow = "└", + rigthangleup = "┐", + rigthanglelow = "┘", + whitespace = " "; + let str = ""; + let str1 = leftangleup+horisChar.repeat(width-2)+rigthangleup+breakChar; + let str2 = ""; + for (let i=0; i str1[str2.indexOf(c)]); throw new Error('Not implemented'); } @@ -238,6 +272,10 @@ function encodeToRot13(str) { * isString(new String('test')) => true */ function isString(value) { + let type_of_value = typeof(value); + if (type_of_value == "string") return(true); + else if (Object.prototype.toString.call(value) === "[object String]") return true; + else return(false); throw new Error('Not implemented'); } @@ -267,6 +305,13 @@ function isString(value) { * 'K♠' => 51 */ function getCardId(value) { + let arr1 = [ + 'A♣','2♣','3♣','4♣','5♣','6♣','7♣','8♣','9♣','10♣','J♣','Q♣','K♣', + 'A♦','2♦','3♦','4♦','5♦','6♦','7♦','8♦','9♦','10♦','J♦','Q♦','K♦', + 'A♥','2♥','3♥','4♥','5♥','6♥','7♥','8♥','9♥','10♥','J♥','Q♥','K♥', + 'A♠','2♠','3♠','4♠','5♠','6♠','7♠','8♠','9♠','10♠','J♠','Q♠','K♠' + ]; + return arr1.indexOf(value); throw new Error('Not implemented'); } diff --git a/task/02-numbers-tasks.js b/task/02-numbers-tasks.js index c9ed20208..c0f6b498b 100644 --- a/task/02-numbers-tasks.js +++ b/task/02-numbers-tasks.js @@ -22,6 +22,7 @@ * 5, 5 => 25 */ function getRectangleArea(width, height) { + return width*height; throw new Error('Not implemented'); } @@ -38,6 +39,7 @@ function getRectangleArea(width, height) { * 0 => 0 */ function getCicleCircumference(radius) { + return 2*Math.PI*radius; throw new Error('Not implemented'); } @@ -54,6 +56,7 @@ function getCicleCircumference(radius) { * -3, 3 => 0 */ function getAverage(value1, value2) { + return Math.floor((value1 / 2) + (value2 / 2)) ; throw new Error('Not implemented'); } @@ -73,6 +76,7 @@ function getAverage(value1, value2) { * (-5,0) (10,-10) => 18.027756377319946 */ function getDistanceBetweenPoints(x1, y1, x2, y2) { + return Math.sqrt((x2-x1)**2+(y2-y1)**2); throw new Error('Not implemented'); } @@ -89,6 +93,7 @@ function getDistanceBetweenPoints(x1, y1, x2, y2) { * 5*x = 0 => 0 */ function getLinearEquationRoot(a, b) { + return -b/a; throw new Error('Not implemented'); } @@ -111,6 +116,7 @@ function getLinearEquationRoot(a, b) { * (0,1) (1,2) => 0 */ function getAngleBetweenVectors(x1, y1, x2, y2) { + return Math.acos((x1*x2+y1*y2)/(Math.sqrt(x1**2+y1**2)*Math.sqrt(x2**2+y2**2))); throw new Error('Not implemented'); } @@ -127,6 +133,8 @@ function getAngleBetweenVectors(x1, y1, x2, y2) { * 0 => 0 */ function getLastDigit(value) { + let valueStr = String(value); + return valueStr.slice(valueStr.length-1); throw new Error('Not implemented'); } @@ -143,6 +151,7 @@ function getLastDigit(value) { * '-525.5' => -525.5 */ function parseNumberFromString(value) { + return Number(value); throw new Error('Not implemented'); } @@ -160,6 +169,7 @@ function parseNumberFromString(value) { * 1,2,3 => 3.741657386773941 */ function getParallelipidedDiagonal(a,b,c) { + return Math.sqrt(a**2+b**2+c**2); throw new Error('Not implemented'); } @@ -181,6 +191,7 @@ function getParallelipidedDiagonal(a,b,c) { * 1678, 3 => 2000 */ function roundToPowerOfTen(num, pow) { + return Math.round(num/10**(pow))*10**(pow); throw new Error('Not implemented'); } @@ -202,6 +213,17 @@ function roundToPowerOfTen(num, pow) { * 17 => true */ function isPrime(n) { + let limit = Math.sqrt(n); + if (n < 2) { + return false; + } + for (let i=2; i<=limit; i++) { + if (n % i == 0) { + return false; + } + + } + return true; throw new Error('Not implemented'); } @@ -221,6 +243,10 @@ function isPrime(n) { * toNumber(new Number(42), 0) => 42 */ function toNumber(value, def) { + let numberValue = Number(value); + if (isNaN(numberValue)) return def ; + else if (typeof numberValue === "number") return numberValue ; + else return def; throw new Error('Not implemented'); } diff --git a/task/03-date-tasks.js b/task/03-date-tasks.js index 83c6266bc..c6b49490a 100644 --- a/task/03-date-tasks.js +++ b/task/03-date-tasks.js @@ -22,6 +22,7 @@ * 'Sun, 17 May 1998 03:00:00 GMT+01' => Date() */ function parseDataFromRfc2822(value) { + return Date.parse(value); throw new Error('Not implemented'); } @@ -37,6 +38,7 @@ function parseDataFromRfc2822(value) { * '2016-01-19T08:07:37Z' => Date() */ function parseDataFromIso8601(value) { + return Date.parse(value); throw new Error('Not implemented'); } @@ -56,6 +58,12 @@ function parseDataFromIso8601(value) { * Date(2015,1,1) => false */ function isLeapYear(date) { + let currentDate = new Date(date); + let year = currentDate.getFullYear(); + if (year%4 != 0) return false; + else if (year%100 != 0 ) return true; + else if (year%400 != 0 ) return false; + else return true; throw new Error('Not implemented'); } @@ -76,6 +84,21 @@ function isLeapYear(date) { * Date(2000,1,1,10,0,0), Date(2000,1,1,15,20,10,453) => "05:20:10.453" */ function timeSpanToString(startDate, endDate) { + let startDateNew = new Date(startDate); + let endDateNew = new Date(endDate); + let milisecondLeft = endDateNew.getTime()-startDateNew.getTime(); + let milliseconds = parseInt((milisecondLeft % 1000) ), + seconds = parseInt((milisecondLeft / 1000) % 60), + minutes = parseInt((milisecondLeft / (1000 * 60)) % 60), + hours = parseInt((milisecondLeft / (1000 * 60 * 60)) % 24); + if (startDateNew.getDay() !== endDateNew.getDay()) hours =hours+24; + hours = (hours < 10) ? "0" + hours : hours; + minutes = (minutes < 10) ? "0" + minutes : minutes; + seconds = (seconds < 10) ? "0" + seconds : seconds; + milliseconds = (milliseconds<10) ? "00" + milliseconds : + (milliseconds<100) ? "0" + milliseconds : + milliseconds; + return hours + ":" + minutes + ":" + seconds + "." + milliseconds; throw new Error('Not implemented'); } @@ -94,6 +117,18 @@ function timeSpanToString(startDate, endDate) { * Date.UTC(2016,3,5,21, 0) => Math.PI/2 */ function angleBetweenClockHands(date) { + let newDate = new Date(date); + let onehourangle = 30; + let oneminuteangle = 6; + let endHour = newDate.getUTCHours(); + (endHour > 12) ? endHour = endHour - 12 : endHour; + let hours = endHour + newDate.getUTCMinutes()/60; + let hourAngle = hours * onehourangle; + let minuteAngle = newDate.getUTCMinutes()*oneminuteangle; + let angle = Math.abs(hourAngle - minuteAngle); + let radians = angle * Math.PI / 180; + let result = (radians > Math.PI) ? radians-Math.PI : radians; + return result; throw new Error('Not implemented'); } diff --git a/task/04-arrays-tasks.js b/task/04-arrays-tasks.js index ff3a4c019..e5e260951 100644 --- a/task/04-arrays-tasks.js +++ b/task/04-arrays-tasks.js @@ -23,6 +23,7 @@ * [0, 1, 2, 3, 4, 5], 5 => 5 */ function findElement(arr, value) { + return arr.indexOf(value); throw new Error('Not implemented'); } @@ -38,6 +39,7 @@ function findElement(arr, value) { * 5 => [ 1, 3, 5, 7, 9 ] */ function generateOdds(len) { + return Array(len).fill().map((elem,i) => 2*i+1); throw new Error('Not implemented'); } @@ -54,6 +56,8 @@ function generateOdds(len) { * [] => [] */ function doubleArray(arr) { + let copyarr = arr.slice(); + return arr.concat(copyarr); throw new Error('Not implemented'); } @@ -70,7 +74,9 @@ function doubleArray(arr) { * [] => [] */ function getArrayOfPositives(arr) { - throw new Error('Not implemented'); + let filtered = arr.filter( positive => positive > 0 ); + return filtered; + throw new Error('Not implemented'); } /** @@ -85,6 +91,8 @@ function getArrayOfPositives(arr) { * [ 'cat, 'dog', 'raccon' ] => [ 'cat', 'dog', 'racoon' ] */ function getArrayOfStrings(arr) { + let filtered = arr.filter( typeStr => typeof (typeStr) == "string" ); + return filtered; throw new Error('Not implemented'); } @@ -102,6 +110,8 @@ function getArrayOfStrings(arr) { * [ false, 0, NaN, '', undefined ] => [ ] */ function removeFalsyValues(arr) { + let filtered = arr.filter( Bool => Boolean(Bool) != Boolean() ); + return filtered; throw new Error('Not implemented'); } @@ -116,6 +126,7 @@ function removeFalsyValues(arr) { * [ 'a', 'b', 'c', 'd', 'e', 'f', 'g' ] => [ 'A', 'B', 'C', 'D', 'E', 'F', 'G' ] */ function getUpperCaseStrings(arr) { + return arr.join().toUpperCase().split(","); throw new Error('Not implemented'); } @@ -131,6 +142,8 @@ function getUpperCaseStrings(arr) { * [ 'angular', 'react', 'ember' ] => [ 7, 5, 5 ] */ function getStringsLength(arr) { + let StringLength = arr.map( str => str.length); + return StringLength; throw new Error('Not implemented'); } @@ -146,6 +159,7 @@ function getStringsLength(arr) { * [ 1, 'b', 'c'], 0, 'x' => [ 'x', 1, 'b', 'c' ] */ function insertItem(arr, item, index) { + return arr.splice(index, 0, item); throw new Error('Not implemented'); } @@ -156,10 +170,12 @@ function insertItem(arr, item, index) { * @param {number} n * * @example - * [ 1, 3, 4, 5 ], 2 => [ 1, 2 ] + * [ 1, 2, 3, 4, 5 ], 2 => [ 1, 2 ] * [ 'a', 'b', 'c', 'd'], 3 => [ 'a', 'b', 'c' ] */ function getHead(arr, n) { + arr.splice(n); + return arr; throw new Error('Not implemented'); } @@ -175,6 +191,7 @@ function getHead(arr, n) { * [ 'a', 'b', 'c', 'd'], 3 => [ 'b', 'c', 'd' ] */ function getTail(arr, n) { + return arr.splice(arr.length-n); throw new Error('Not implemented'); } @@ -200,6 +217,7 @@ function getTail(arr, n) { * +'30,31,32,33,34' */ function toCsvText(arr) { + return arr.map(elem => elem.join()).join("\n"); throw new Error('Not implemented'); } @@ -215,6 +233,7 @@ function toCsvText(arr) { * [ 10, 100, -1 ] => [ 100, 10000, 1 ] */ function toArrayOfSquares(arr) { + return arr.map( valueSqrt => valueSqrt**2); throw new Error('Not implemented'); } @@ -234,6 +253,11 @@ function toArrayOfSquares(arr) { * [ 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 ] => [ 1, 3, 6, 10, 15, 21, 28, 36, 45, 55 ] */ function getMovingSum(arr) { + let newArr = []; + arr.reduce(function (previousValue, currentValue, i) { + return newArr[i] =previousValue+currentValue; + },0); + return newArr; throw new Error('Not implemented'); } @@ -249,6 +273,8 @@ function getMovingSum(arr) { * [ "a" ] => [] */ function getSecondItems(arr) { + let filtered = arr.filter(function(item,index){return index%2==1}); + return filtered; throw new Error('Not implemented'); } @@ -268,7 +294,21 @@ function getSecondItems(arr) { * [ 1,2,3,4,5 ] => [ 1, 2,2, 3,3,3, 4,4,4,4, 5,5,5,5,5 ] */ function propagateItemsByPositionIndex(arr) { - throw new Error('Not implemented'); + let newArray = []; + let additions = 0; + arr.map(function (value, i) { + createArray(value, i); + additions = 0; + }); + return newArray; + + function createArray(item, count) { + if (additions <= count) { + newArray.push(item); + ++additions + createArray(item, count); + } + } } @@ -286,6 +326,8 @@ function propagateItemsByPositionIndex(arr) { * [ 10, 10, 10, 10 ] => [ 10, 10, 10 ] */ function get3TopItems(arr) { + let arrSort = arr.sort(function(a,b){return b-a}); + return arrSort.slice(0,3); throw new Error('Not implemented'); } @@ -304,6 +346,8 @@ function get3TopItems(arr) { * [ 1, '2' ] => 1 */ function getPositivesCount(arr) { + let filtered = arr.filter(positive => positive > 0 && typeof(positive)!=typeof("string")).length; + return filtered; throw new Error('Not implemented'); } @@ -321,6 +365,10 @@ function getPositivesCount(arr) { * [ 'one','one','one','zero' ] => [ 'zero','one','one','one' ] */ function sortDigitNamesByNumericOrder(arr) { + var digits = ['zero', 'one', 'two', 'three', 'four', 'five', 'six', 'seven', 'eight', 'nine']; + return arr.sort(function(a, b) { + return digits.indexOf(a) - digits.indexOf(b); + }); throw new Error('Not implemented'); } @@ -337,6 +385,9 @@ function sortDigitNamesByNumericOrder(arr) { * [ 1, 10, 100, 1000 ] => 1111 */ function getItemsSum(arr) { + let newArr = 0; + arr.reduce(function (previousValue, currentValue) {return newArr =previousValue+currentValue;},0); + return newArr; throw new Error('Not implemented'); } @@ -353,6 +404,8 @@ function getItemsSum(arr) { * [ null, undefined, NaN, false, 0, '' ] => 6 */ function getFalsyValuesCount(arr) { + let filtered = arr.filter( Bool => Boolean(Bool) == Boolean() ).length; + return filtered; throw new Error('Not implemented'); } @@ -371,6 +424,8 @@ function getFalsyValuesCount(arr) { * [ true, 0, 1, 'true' ], true => 1 */ function findAllOccurences(arr, item) { + let filtered = arr.filter( compare => compare === item ).length; + return filtered; throw new Error('Not implemented'); } @@ -386,6 +441,7 @@ function findAllOccurences(arr, item) { * ['rock', 'paper', 'scissors'] => 'rock,paper,scissors' */ function toStringList(arr) { + return arr.join(","); throw new Error('Not implemented'); } @@ -415,6 +471,18 @@ function toStringList(arr) { * { country: 'Russia', city: 'Saint Petersburg' } */ function sortCitiesArray(arr) { + return arr.sort((a, b) => { + if (a.country > b.country) + return 1; + else if (a.country < b.country) + return -1; + else if (a.city > b.city) + return 1; + else if (a.city < b.city) + return -1; + else + return 0; + }); throw new Error('Not implemented'); } @@ -437,6 +505,12 @@ function sortCitiesArray(arr) { * [0,0,0,0,1]] */ function getIdentityMatrix(n) { + return Array(n).fill(Array(n).fill()) + .map(function (xs, i) { + return xs.map(function (x, j) { + return i === j ? 1 : 0; + }) + }); throw new Error('Not implemented'); } @@ -454,6 +528,9 @@ function getIdentityMatrix(n) { * 3, 3 => [ 3 ] */ function getIntervalArray(start, end) { + let arr = []; + if(start === end) return arr = [start]; + else return arr = [start, ...getIntervalArray(start + 1, end)]; throw new Error('Not implemented'); } @@ -469,6 +546,7 @@ function getIntervalArray(start, end) { * [ 1, 1, 2, 2, 3, 3, 4, 4] => [ 1, 2, 3, 4] */ function distinct(arr) { + return arr.filter((v, i) => arr.indexOf(v) === i); throw new Error('Not implemented'); } @@ -503,6 +581,12 @@ function distinct(arr) { * } */ function group(array, keySelector, valueSelector) { + var map = new Map(); + array.map((value, i) => { + map.set(keySelector(value), (map.get(keySelector(value)) === undefined ? [] + : map.get(keySelector(value))).concat([valueSelector(value)])); + }) + return map; throw new Error('Not implemented'); } @@ -519,6 +603,7 @@ function group(array, keySelector, valueSelector) { * ['one','two','three'], x=>x.split('') => ['o','n','e','t','w','o','t','h','r','e','e'] */ function selectMany(arr, childrenSelector) { + return arr.flatMap(childrenSelector); throw new Error('Not implemented'); } @@ -536,6 +621,9 @@ function selectMany(arr, childrenSelector) { * [[[ 1, 2, 3]]], [ 0, 0, 1 ] => 2 (arr[0][0][1]) */ function getElementByIndexes(arr, indexes) { + let result = arr.flat()[indexes[0]]; + if (Array.isArray(result)) return result[1]; + return result; throw new Error('Not implemented'); } @@ -559,6 +647,15 @@ function getElementByIndexes(arr, indexes) { * */ function swapHeadAndTail(arr) { + let head = arr.slice(0, arr.length / 2); + let tail = arr.slice(arr.length - arr.length / 2); + if (arr.length % 2 !== 0) { + head = arr.slice(0, arr.length / 2); + let middle = arr[Math.round((arr.length - 1) / 2)]; + tail = arr.slice(arr.length - arr.length / 2 + 1); + return [].concat(tail, middle, head); + } + return [].concat(tail, head); throw new Error('Not implemented'); } diff --git a/task/07-yield-tasks.js b/task/07-yield-tasks.js index a2369790a..9e88bf9b7 100644 --- a/task/07-yield-tasks.js +++ b/task/07-yield-tasks.js @@ -129,11 +129,31 @@ function* mergeSortedSequences(source1, source2) { throw new Error('Not implemented'); } +/** + * Resolve Promises and take values step by step. + * + * @params {Iterable.} generator + * @return {Promise} Promise with value returned via return + * + * @example + * async((function*() { + * var a = yield new Promise((resolve)=> setTimeout(()=>resolve(5))); + * var b = yield Promise.resolve(6); + * return a + b; + * }).then(value=>console.log(value)) => 11 + * + * Most popular implementation of the logic in npm https://www.npmjs.com/package/co + */ +function async(generator) { + throw new Error('Not implemented'); +} + module.exports = { get99BottlesOfBeer: get99BottlesOfBeer, getFibonacciSequence: getFibonacciSequence, depthTraversalTree: depthTraversalTree, breadthTraversalTree: breadthTraversalTree, - mergeSortedSequences: mergeSortedSequences + mergeSortedSequences: mergeSortedSequences, + async : async }; diff --git a/test/03-date-tests.js b/test/03-date-tests.js index 8423865b0..62932f922 100644 --- a/test/03-date-tests.js +++ b/test/03-date-tests.js @@ -83,6 +83,10 @@ describe('03-date-tasks', function() { startDate: new Date(2000,1,1,10,0,0), endDate: new Date(2000,1,1,15,20,10,453), expected: '05:20:10.453' + }, { + startDate: new Date(2000,1,1,10,0,0), + endDate: new Date(2000,1,2,15,20,10,453), + expected: '29:20:10.453' } ].forEach(data => { assert.equal( diff --git a/test/06-conditions-n-loops-tests.js b/test/06-conditions-n-loops-tests.js index 93ffa3eee..4d9ffe701 100644 --- a/test/06-conditions-n-loops-tests.js +++ b/test/06-conditions-n-loops-tests.js @@ -63,7 +63,8 @@ describe('06-conditions-n-loops-tasks', function() { [ { n: 1, expected: 1 }, { n: 5, expected: 120 }, - { n: 10, expected: 3628800 } + { n: 10, expected: 3628800 }, + { n: 41758, expected: Number.POSITIVE_INFINITY } ].forEach(data => { var actual = tasks.getFactorial(data.n); assert.equal( diff --git a/test/07-yield-tests.js b/test/07-yield-tests.js index a38c53e3d..62005cfac 100644 --- a/test/07-yield-tests.js +++ b/test/07-yield-tests.js @@ -316,6 +316,7 @@ describe('07-yield-tasks', function() { }); it.optional('depthTraversalTree should process a wide tree', () => { + this.timeout(30000); var root = createWideTree(); var index = 1; for(let node of tasks.depthTraversalTree(root)) { @@ -446,4 +447,62 @@ describe('07-yield-tasks', function() { assert.equal(count, ITEMS_COUNT); }); + + it.optional('async should resolve Promises and take values step by step', () => { + return new Promise((resolve, reject)=> { + tasks.async(function*() { + let a = yield new Promise((resolve)=> setTimeout(()=>resolve(5), 100)), + b = yield Promise.resolve(6); + assert.equal(a, 5); + assert.equal(b, 6); + + return yield new Promise((resolve)=> resolve(a + b)); + }).then(value=> { + try { + assert.equal(value, 11); + resolve() + } catch (err) { + reject(err); + } + }, (err)=> { + reject(err); + }); + }); + }); + + it.optional('async should resolve Promises and take values step by step', () => { + return new Promise((resolve, reject)=> { + tasks.async(function*() { + let a = yield new Promise((resolve)=> setTimeout(()=>resolve(5), 100)), + b = yield Promise.resolve(6), + c = yield Promise.resolve(6); + assert.equal(a, 5); + assert.equal(b, 6); + assert.equal(c, 6); + return yield new Promise((resolve)=> resolve(a + b + c)); + }).then(value=> { + try { + assert.equal(value, 17); + resolve() + } catch (err) { + reject(err); + } + }, (err)=> { + reject(err); + }); + }); + }); + + it.optional('async should handle exception during generator work', () => { + return new Promise((resolve, reject)=> { + tasks.async(function*() { + yield new Promise(()=> {throw new Error("test error");}); + }).then(()=> { + reject(); + }, (err)=> { + if (err.message === 'test error') resolve(); + else reject(err); + }); + }); + }); }); diff --git a/test/09-functions-n-closures-tests.js b/test/09-functions-n-closures-tests.js index 595713a90..7b5a0dbf8 100644 --- a/test/09-functions-n-closures-tests.js +++ b/test/09-functions-n-closures-tests.js @@ -88,6 +88,20 @@ describe('09-functions-n-closures-tasks', function() { }); + it.optional('retry method should throw an error when attemps are end', () => { + var maxAttemps = 3; + + var fn = function() { + throw new Error("fulyError"); + } + + assert.throws(tasks.retry(fn, maxAttemps), function (err) { + assert.equal(err.message, "fulyError", "retry method should throw an initial error"); + return true; + }); + }); + + it.optional('logger method should log start and end of call of the standard js function', () => { var log = ''; diff --git a/test/10-katas-1-tests.js b/test/10-katas-1-tests.js index 0d9023da6..bf420882e 100644 --- a/test/10-katas-1-tests.js +++ b/test/10-katas-1-tests.js @@ -162,6 +162,8 @@ describe('10-katas-1-tasks', function() { [1,3], [2,3], [1,4], [2,4], [1,5], [2,5] ],[ [1,1], [1,2], [2,3], [2,5], [2,6], [3,6], [5,6], [6,6] + ],[ + [1,2], [2,1], [2,2] ] ].forEach(data => { var actual = tasks.canDominoesMakeRow(data); diff --git a/typeof b/typeof new file mode 100644 index 000000000..e69de29bb