Test

.gitattributes

@@ -0,0 +1,2 @@
+# Auto detect text files and perform LF normalization
+* text=auto

.travis.yml

@@ -1,3 +1,3 @@
 language: node_js
 node_js:
-  - "5.10.0"
+  - "14.17.0"

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)
+[![Brest Shagoysai](http://brest.rollingscopes.com/images/logo_rs_text.svg)](http://brest.rollingscopes.com/)
+#Brest Shagoysai School
+## Javascript Assignments  [![Build Status](https://travis-ci.org/Shagoysai/js-assignments.svg?branch=master)](https://travis-ci.org/Shagoysai/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.
 
@@ -22,14 +22,14 @@ To start javascript assignments please follow the next steps:
 ### How to setup travis-ci
 * Open [https://travis-ci.org/](https://travis-ci.org/) and sign in with your github account.
 * Activate your forked repo **js-assignments**.
-* Edit local README.md file and update all links (just replace all occurrences of `'rolling-scopes-school'` with your account name).
+* Edit local README.md file and update all links (just replace all occurrences of `'Shagoysai'` with your account name).
 * Commit and push updated README.md to github:
 ```bash
   git add README.md
   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/Shagoysai/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/Shagoysai/js-assignments/builds).
 * If everything is OK you can try to resolve the next task.
 
 ### How to debug tasks

task/01-strings-tasks.js

@@ -22,7 +22,7 @@
  *   '',  'bb'  => 'bb'
  */
 function concatenateStrings(value1, value2) {
-    throw new Error('Not implemented');
+    return value1.concat(value2);
 }
 
 
@@ -38,7 +38,7 @@ function concatenateStrings(value1, value2) {
  *   ''      => 0
  */
 function getStringLength(value) {
-    throw new Error('Not implemented');
+    return value.length;
 }
 
 /**
@@ -55,7 +55,7 @@ function getStringLength(value) {
  *   'Chuck','Norris'  => 'Hello, Chuck Norris!'
  */
 function getStringFromTemplate(firstName, lastName) {
-    throw new Error('Not implemented');
+    return `Hello, ${firstName} ${lastName}!`;
 }
 
 /**
@@ -69,7 +69,7 @@ function getStringFromTemplate(firstName, lastName) {
  *   'Hello, Chuck Norris!' => 'Chuck Norris'
  */
 function extractNameFromTemplate(value) {
-    throw new Error('Not implemented');
+    return new RegExp("Hello, (.+)!").exec(value)[1];
 }
 
 
@@ -84,7 +84,7 @@ function extractNameFromTemplate(value) {
  *   'cat'       => 'c'
  */
 function getFirstChar(value) {
-    throw new Error('Not implemented');
+    return value.substring(0,1);
 }
 
 /**
@@ -99,7 +99,7 @@ function getFirstChar(value) {
  *   '\tHello, World! ' => 'Hello, World!'
  */
 function removeLeadingAndTrailingWhitespaces(value) {
-    throw new Error('Not implemented');
+    return value.trim();
 }
 
 /**
@@ -114,7 +114,7 @@ function removeLeadingAndTrailingWhitespaces(value) {
  *   'cat', 3 => 'catcatcat'
  */
 function repeatString(value, count) {
-    throw new Error('Not implemented');
+    return value.repeat(count);
 }
 
 /**
@@ -130,7 +130,7 @@ function repeatString(value, count) {
  *   'ABABAB','BA' => 'ABAB'
  */
 function removeFirstOccurrences(str, value) {
-    throw new Error('Not implemented');
+    return str.replace(value, '');
 }
 
 /**
@@ -145,7 +145,7 @@ function removeFirstOccurrences(str, value) {
  *   '<a>' => 'a'
  */
 function unbracketTag(str) {
-    throw new Error('Not implemented');
+    return str.replace('<', '').replace('>', '');
 }
 
 
@@ -160,7 +160,7 @@ function unbracketTag(str) {
  *  'abcdefghijklmnopqrstuvwxyz' => 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'
  */
 function convertToUpperCase(str) {
-    throw new Error('Not implemented');
+    return str.toUpperCase();
 }
 
 /**
@@ -174,7 +174,7 @@ function convertToUpperCase(str) {
  *   '[email protected]' => ['[email protected]']
  */
 function extractEmails(str) {
-    throw new Error('Not implemented');
+    return str.split(';');
 }
 
 /**
@@ -201,7 +201,10 @@ function extractEmails(str) {
  *
  */
 function getRectangleString(width, height) {
-    throw new Error('Not implemented');
+    const top = `┌${'─'.repeat(width - 2)}┐\n`;
+	const mid = `│${' '.repeat(width - 2)}│\n`;
+	const bottom = `└${'─'.repeat(width - 2)}┘\n`;
+	return top + mid.repeat(height - 2) + bottom;
 }
 
 
@@ -221,7 +224,10 @@ function getRectangleString(width, height) {
  *
  */
 function encodeToRot13(str) {
-    throw new Error('Not implemented');
+    const input = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz'.split('');
+    const output = 'NOPQRSTUVWXYZABCDEFGHIJKLMnopqrstuvwxyzabcdefghijklm'.split('');
+    const lookup = input.reduce((m, k, i) => Object.assign(m, { [k]: output[i] }), {});
+    return str.split('').map((x) => lookup[x] || x).join('');
 }
 
 /**
@@ -238,7 +244,7 @@ function encodeToRot13(str) {
  *   isString(new String('test')) => true
  */
 function isString(value) {
-    throw new Error('Not implemented');
+    return Object.prototype.toString.call(value) === "[object String]";
 }
 
 
@@ -267,7 +273,14 @@ function isString(value) {
  *   'K♠' => 51
  */
 function getCardId(value) {
-    throw new Error('Not implemented');
+    const cards = [
+		'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 cards.indexOf(value);
 }
 
 

task/02-numbers-tasks.js

@@ -22,7 +22,7 @@
  *   5, 5  => 25
  */
 function getRectangleArea(width, height) {
-    throw new Error('Not implemented');
+    return width * height;
 }
 
 
@@ -38,7 +38,7 @@ function getRectangleArea(width, height) {
  *   0    => 0
  */
 function getCicleCircumference(radius) {
-    throw new Error('Not implemented');
+    return Math.PI * radius * 2;
 }
 
 /**
@@ -54,7 +54,7 @@ function getCicleCircumference(radius) {
  *  -3, 3  => 0
  */
 function getAverage(value1, value2) {
-    throw new Error('Not implemented');
+    return value1/2 + value2/2;
 }
 
 /**
@@ -73,7 +73,9 @@ function getAverage(value1, value2) {
  *   (-5,0) (10,-10) => 18.027756377319946
  */
 function getDistanceBetweenPoints(x1, y1, x2, y2) {
-    throw new Error('Not implemented');
+    var a = x1 - x2;
+    var b = y1 - y2;
+    return Math.sqrt(a*a + b*b);
 }
 
 /**
@@ -89,7 +91,7 @@ function getDistanceBetweenPoints(x1, y1, x2, y2) {
  *   5*x = 0         => 0
  */
 function getLinearEquationRoot(a, b) {
-    throw new Error('Not implemented');
+    return -1 * b/a;
 }
 
 
@@ -111,7 +113,11 @@ function getLinearEquationRoot(a, b) {
  *   (0,1) (1,2)     => 0
  */
 function getAngleBetweenVectors(x1, y1, x2, y2) {
-    throw new Error('Not implemented');
+    var angle = Math.atan2(y2, x2) - Math.atan2(y1, x1)
+    if (angle < 0) {
+        angle += 2 * Math.PI;
+    }
+    return angle
 }
 
 /**
@@ -127,7 +133,7 @@ function getAngleBetweenVectors(x1, y1, x2, y2) {
  *     0     => 0
  */
 function getLastDigit(value) {
-    throw new Error('Not implemented');
+    return Math.abs(value) % 10;
 }
 
 
@@ -143,7 +149,7 @@ function getLastDigit(value) {
  * '-525.5'     => -525.5
  */
 function parseNumberFromString(value) {
-    throw new Error('Not implemented');
+    return Number(value);
 }
 
 /**
@@ -160,7 +166,7 @@ function parseNumberFromString(value) {
  *   1,2,3   => 3.741657386773941
  */
 function getParallelipidedDiagonal(a,b,c) {
-    throw new Error('Not implemented');
+    return Math.sqrt(a*a + b*b + c*c);
 }
 
 /**
@@ -181,7 +187,9 @@ function getParallelipidedDiagonal(a,b,c) {
  *   1678, 3  => 2000
  */
 function roundToPowerOfTen(num, pow) {
-    throw new Error('Not implemented');
+    let a = Math.pow(10, pow);
+
+	return (a === 0) ? num : Math.round(num / a) * a;
 }
 
 /**
@@ -202,7 +210,11 @@ function roundToPowerOfTen(num, pow) {
  *   17 => true
  */
 function isPrime(n) {
-    throw new Error('Not implemented');
+    for (let i = 2; i < n / 2 + 1; i++) {
+        if (n % i == 0)
+            return false;
+    }
+    return true;
 }
 
 /**
@@ -221,7 +233,7 @@ function isPrime(n) {
  *   toNumber(new Number(42), 0) => 42
  */
 function toNumber(value, def) {
-    throw new Error('Not implemented');
+    return typeof +value == 'number' && !isNaN(+value) ? +value : def;
 }
 
 module.exports = {

task/03-date-tasks.js

@@ -22,7 +22,7 @@
  *    'Sun, 17 May 1998 03:00:00 GMT+01' => Date()
  */
 function parseDataFromRfc2822(value) {
-   throw new Error('Not implemented');
+   return Date.parse(value);
 }
 
 /**
@@ -37,7 +37,7 @@ function parseDataFromRfc2822(value) {
  *    '2016-01-19T08:07:37Z' => Date()
  */
 function parseDataFromIso8601(value) {
-   throw new Error('Not implemented');
+   return Date.parse(value);
 }
 
 
@@ -56,7 +56,8 @@ function parseDataFromIso8601(value) {
  *    Date(2015,1,1)    => false
  */
 function isLeapYear(date) {
-   throw new Error('Not implemented');
+   const year = date.getFullYear();
+	return ((year % 4 === 0) && (year % 100 !== 0)) || (year % 400 === 0);
 }
 
 
@@ -76,7 +77,7 @@ 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) {
-   throw new Error('Not implemented');
+   return (new Date(endDate - startDate)).toISOString().slice(11, -1);
 }
 
 
@@ -94,7 +95,13 @@ function timeSpanToString(startDate, endDate) {
  *    Date.UTC(2016,3,5,21, 0) => Math.PI/2
  */
 function angleBetweenClockHands(date) {
-    throw new Error('Not implemented');
+   const hoursArrow = 0.5 * (60 * (date.getUTCHours() % 12) + date.getUTCMinutes());
+   const minutesArrow = 6 * date.getUTCMinutes();
+   let angle = Math.abs(hoursArrow - minutesArrow);
+   if (angle > 180) {
+       angle = 360 - angle;
+   }
+   return (angle * Math.PI / 180);
 }