251051 Марчук

task/01-strings-tasks.js

@@ -4,7 +4,7 @@
  *                                                                                          *
  * Plese read the following tutorial before implementing tasks:                             *
  * https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String  *
- *                                                                                          *
+ *              npm test ./test/01-strings-tests.js                                                                              *
  ********************************************************************************************/
 
 
@@ -22,7 +22,7 @@
  *   '',  'bb'  => 'bb'
  */
 function concatenateStrings(value1, value2) {
-    throw new Error('Not implemented');
+    return value1 + 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 + "!";
 }
 
 /**
@@ -69,10 +69,9 @@ function getStringFromTemplate(firstName, lastName) {
  *   'Hello, Chuck Norris!' => 'Chuck Norris'
  */
 function extractNameFromTemplate(value) {
-    throw new Error('Not implemented');
+    return value.slice(7, -1);
 }
 
-
 /**
  * Returns a first char of the given string.
  *
@@ -84,7 +83,7 @@ function extractNameFromTemplate(value) {
  *   'cat'       => 'c'
  */
 function getFirstChar(value) {
-    throw new Error('Not implemented');
+    return value[0];
 }
 
 /**
@@ -99,7 +98,7 @@ function getFirstChar(value) {
  *   '\tHello, World! ' => 'Hello, World!'
  */
 function removeLeadingAndTrailingWhitespaces(value) {
-    throw new Error('Not implemented');
+    return value.trim();
 }
 
 /**
@@ -114,7 +113,7 @@ function removeLeadingAndTrailingWhitespaces(value) {
  *   'cat', 3 => 'catcatcat'
  */
 function repeatString(value, count) {
-    throw new Error('Not implemented');
+    return value.repeat(count);
 }
 
 /**
@@ -130,7 +129,7 @@ function repeatString(value, count) {
  *   'ABABAB','BA' => 'ABAB'
  */
 function removeFirstOccurrences(str, value) {
-    throw new Error('Not implemented');
+    return str.replace(value,'');
 }
 
 /**
@@ -145,7 +144,7 @@ function removeFirstOccurrences(str, value) {
  *   '<a>' => 'a'
  */
 function unbracketTag(str) {
-    throw new Error('Not implemented');
+    return str.replace(/[<,>]/gi,'');
 }
 
 
@@ -160,7 +159,7 @@ function unbracketTag(str) {
  *  'abcdefghijklmnopqrstuvwxyz' => 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'
  */
 function convertToUpperCase(str) {
-    throw new Error('Not implemented');
+    return str.toUpperCase();
 }
 
 /**
@@ -174,7 +173,8 @@ function convertToUpperCase(str) {
  *   '[email protected]' => ['[email protected]']
  */
 function extractEmails(str) {
-    throw new Error('Not implemented');
+    let arr = str.split(';')
+    return arr;
 }
 
 /**
@@ -201,7 +201,10 @@ function extractEmails(str) {
  *
  */
 function getRectangleString(width, height) {
-    throw new Error('Not implemented');
+    let top = `┌${'─'.repeat(width - 2)}┐\n`;
+	let mid = `│${' '.repeat(width - 2)}│\n`;
+	let bottom = `└${'─'.repeat(width - 2)}┘\n`;
+	return top + mid.repeat(height - 2) + bottom;
 }
 
 
@@ -221,7 +224,9 @@ function getRectangleString(width, height) {
  *
  */
 function encodeToRot13(str) {
-    throw new Error('Not implemented');
+    const originalAlpha = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
+    const cipher = "nopqrstuvwxyzabcdefghijklmNOPQRSTUVWXYZABCDEFGHIJKLM"
+    return str.replace(/[a-z]/gi, letter => cipher[originalAlpha.indexOf(letter)])
 }
 
 /**
@@ -238,7 +243,7 @@ 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 +272,14 @@ 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

@@ -6,7 +6,7 @@
  * https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Numbers_and_dates          *
  * https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number  *
  * https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math    *
- *                                                                                          *
+ *       npm test ./test/02-numbers-tests.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 2 * Math.PI * radius;
 }
 
 /**
@@ -54,7 +54,11 @@ function getCicleCircumference(radius) {
  *  -3, 3  => 0
  */
 function getAverage(value1, value2) {
-    throw new Error('Not implemented');
+    /*let a=Number(value1);
+    let b=Number(value2);
+    let res = (a+b)/2;
+    return res;*/
+    return value1/2 + value2/2;
 }
 
 /**
@@ -73,7 +77,8 @@ function getAverage(value1, value2) {
  *   (-5,0) (10,-10) => 18.027756377319946
  */
 function getDistanceBetweenPoints(x1, y1, x2, y2) {
-    throw new Error('Not implemented');
+    let sum = Math.pow(x1-x2, 2)+Math.pow(y1-y2, 2);
+    return Math.pow(sum, 0.5);
 }
 
 /**
@@ -89,7 +94,8 @@ function getDistanceBetweenPoints(x1, y1, x2, y2) {
  *   5*x = 0         => 0
  */
 function getLinearEquationRoot(a, b) {
-    throw new Error('Not implemented');
+    let x= (0-b)/a;
+    return x;
 }
 
 
@@ -111,7 +117,11 @@ 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 +137,7 @@ function getAngleBetweenVectors(x1, y1, x2, y2) {
  *     0     => 0
  */
 function getLastDigit(value) {
-    throw new Error('Not implemented');
+    return value%10;
 }
 
 
@@ -143,7 +153,7 @@ function getLastDigit(value) {
  * '-525.5'     => -525.5
  */
 function parseNumberFromString(value) {
-    throw new Error('Not implemented');
+    return Number(value);
 }
 
 /**
@@ -160,7 +170,9 @@ function parseNumberFromString(value) {
  *   1,2,3   => 3.741657386773941
  */
 function getParallelipidedDiagonal(a,b,c) {
-    throw new Error('Not implemented');
+    let sum = Math.pow(a,2)+Math.pow(b,2)+Math.pow(c,2);
+    let result=Math.pow(sum,0.5);
+    return result;
 }
 
 /**
@@ -181,7 +193,10 @@ function getParallelipidedDiagonal(a,b,c) {
  *   1678, 3  => 2000
  */
 function roundToPowerOfTen(num, pow) {
-    throw new Error('Not implemented');
+    let a = Math.pow(10,pow);
+    let b = num/a;
+    let c = Math.round(b);
+    return c*a;
 }
 
 /**
@@ -202,7 +217,12 @@ 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 +241,12 @@ function isPrime(n) {
  *   toNumber(new Number(42), 0) => 42
  */
 function toNumber(value, def) {
-    throw new Error('Not implemented');
+    const num = Number(value);
+    if(isNaN(num)){
+        return def;
+    }else{
+        return num;
+    }
 }
 
 module.exports = {

task/03-date-tasks.js

@@ -5,7 +5,7 @@
  * Plese read the following tutorial before implementing tasks:                             *
  * https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Numbers_and_dates#Date_object
  * https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date    *
- *                                                                                          *
+ *    npm test ./test/03-date-tests.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');
+   let 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);
 }