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core-js-101 #57

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146 changes: 109 additions & 37 deletions src/01-strings-tasks.js
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Original file line number Diff line number Diff line change
Expand Up @@ -5,7 +5,6 @@
* *
******************************************************************************************* */


/**
* Returns the result of concatenation of two strings.
*
Expand All @@ -18,11 +17,10 @@
* 'aa','' => 'aa'
* '', 'bb' => 'bb'
*/
function concatenateStrings(/* value1, value2 */) {
throw new Error('Not implemented');
function concatenateStrings(value1, value2) {
return `${value1}${value2}`;
}


/**
* Returns the length of given string.
*
Expand All @@ -34,8 +32,8 @@ function concatenateStrings(/* value1, value2 */) {
* 'b' => 1
* '' => 0
*/
function getStringLength(/* value */) {
throw new Error('Not implemented');
function getStringLength(value) {
return value.length;
}

/**
Expand All @@ -51,8 +49,8 @@ function getStringLength(/* value */) {
* 'John','Doe' => 'Hello, John Doe!'
* 'Chuck','Norris' => 'Hello, Chuck Norris!'
*/
function getStringFromTemplate(/* firstName, lastName */) {
throw new Error('Not implemented');
function getStringFromTemplate(firstName, lastName) {
return `Hello, ${firstName} ${lastName}!`;
}

/**
Expand All @@ -65,11 +63,10 @@ function getStringFromTemplate(/* firstName, lastName */) {
* 'Hello, John Doe!' => 'John Doe'
* 'Hello, Chuck Norris!' => 'Chuck Norris'
*/
function extractNameFromTemplate(/* value */) {
throw new Error('Not implemented');
function extractNameFromTemplate(value) {
return value.slice(7, -1);
}


/**
* Returns a first char of the given string.
*
Expand All @@ -80,8 +77,8 @@ function extractNameFromTemplate(/* value */) {
* 'John Doe' => 'J'
* 'cat' => 'c'
*/
function getFirstChar(/* value */) {
throw new Error('Not implemented');
function getFirstChar(value) {
return value[0];
}

/**
Expand All @@ -95,8 +92,8 @@ function getFirstChar(/* value */) {
* 'cat' => 'cat'
* '\tHello, World! ' => 'Hello, World!'
*/
function removeLeadingAndTrailingWhitespaces(/* value */) {
throw new Error('Not implemented');
function removeLeadingAndTrailingWhitespaces(value) {
return value.trim();
}

/**
Expand All @@ -110,8 +107,8 @@ function removeLeadingAndTrailingWhitespaces(/* value */) {
* 'A', 5 => 'AAAAA'
* 'cat', 3 => 'catcatcat'
*/
function repeatString(/* value, count */) {
throw new Error('Not implemented');
function repeatString(value, count) {
return value.repeat(count);
}

/**
Expand All @@ -126,8 +123,8 @@ function repeatString(/* value, count */) {
* 'I like legends', 'end' => 'I like legs',
* 'ABABAB','BA' => 'ABAB'
*/
function removeFirstOccurrences(/* str, value */) {
throw new Error('Not implemented');
function removeFirstOccurrences(str, value) {
return str.replace(value, '');
}

/**
Expand All @@ -141,11 +138,10 @@ function removeFirstOccurrences(/* str, value */) {
* '<span>' => 'span'
* '<a>' => 'a'
*/
function unbracketTag(/* str */) {
throw new Error('Not implemented');
function unbracketTag(str) {
return str.slice(1, str.length - 1);
}


/**
* Converts all characters of the specified string into the upper case
*
Expand All @@ -156,8 +152,8 @@ function unbracketTag(/* str */) {
* 'Thunderstruck' => 'THUNDERSTRUCK'
* 'abcdefghijklmnopqrstuvwxyz' => 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'
*/
function convertToUpperCase(/* str */) {
throw new Error('Not implemented');
function convertToUpperCase(str) {
return str.toUpperCase();
}

/**
Expand All @@ -175,8 +171,8 @@ function convertToUpperCase(/* str */) {
* ],
* 'info@gmail.com' => ['info@gmail.com']
*/
function extractEmails(/* str */) {
throw new Error('Not implemented');
function extractEmails(str) {
return str.split(';');
}

/**
Expand All @@ -202,10 +198,21 @@ function extractEmails(/* str */) {
* '└──────────┘\n'
*
*/
function getRectangleString(/* width, height */) {
throw new Error('Not implemented');
}
function getRectangleString(width, height) {
let res = '';

for (let i = 0; i < height; i += 1) {
if (i === 0) {
res += `┌${'─'.repeat(width - 2)}┐\n`;
} else if (i === height - 1) {
res += `└${'─'.repeat(width - 2)}┘\n`;
} else {
res += `│${' '.repeat(width - 2)}│\n`;
}
}

return res;
}

/**
* Encode specified string with ROT13 cipher
Expand All @@ -223,8 +230,20 @@ function getRectangleString(/* width, height */) {
* => 'NOPQRSTUVWXYZABCDEFGHIJKLMnopqrstuvwxyzabcdefghijklm'
*
*/
function encodeToRot13(/* str */) {
throw new Error('Not implemented');
function encodeToRot13(str) {
const charOne = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz';
const charTwo = 'NOPQRSTUVWXYZABCDEFGHIJKLMnopqrstuvwxyzabcdefghijklm';
let result = '';
let index = 0;
for (let i = 0; i < str.length; i += 1) {
if (str[i] === ' ' || str[i] === '?' || str[i] === '!') {
result += str[i];
} else {
index = charOne.indexOf(str[i]);
result += charTwo[index];
}
}
return result;
}

/**
Expand All @@ -240,11 +259,10 @@ function encodeToRot13(/* str */) {
* isString('test') => true
* isString(new String('test')) => true
*/
function isString(/* value */) {
throw new Error('Not implemented');
function isString(value) {
return value instanceof String || typeof value === 'string';
}


/**
* Returns playid card id.
*
Expand All @@ -269,10 +287,64 @@ function isString(/* value */) {
* 'Q♠' => 50
* 'K♠' => 51
*/
function getCardId(/* value */) {
throw new Error('Not implemented');
}
function getCardId(value) {
const array = [
'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 array.indexOf(value);
}

module.exports = {
concatenateStrings,
Expand Down
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