These are chat archives for camperbot/bonfire-check-for-palindromes

29th
Sep 2015
Graham Whitley
@lotusgraham
Sep 29 2015 00:12
hint
CamperBot
@camperbot
Sep 29 2015 00:12

hint [1/8]

## :construction: After this are possible spoiler hints.

Make sure you've tried to hard to solve it yourself before proceeding. :construction:

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Graham Whitley
@lotusgraham
Sep 29 2015 00:12
hint
CamperBot
@camperbot
Sep 29 2015 00:12

hint [2/8]

Explanation:

You have to check if the string you get as an input is a palindrome and return true if it is, and false otherwise.

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Graham Whitley
@lotusgraham
Sep 29 2015 00:12
hint
CamperBot
@camperbot
Sep 29 2015 00:12

hint [3/8]

Hint: 1

You may use regular expressions (RegExp) to remove unwanted characters from the string.

type hint for next hint :pencil: [Contribute at the FCC Wiki]

Graham Whitley
@lotusgraham
Sep 29 2015 00:12
hint
CamperBot
@camperbot
Sep 29 2015 00:12

hint [4/8]

Hint: 2

You may use Array.prototype.split and Array.prototype.join methods or for loop.

type hint for next hint :pencil: [Contribute at the FCC Wiki]

Graham Whitley
@lotusgraham
Sep 29 2015 00:16
hint
CamperBot
@camperbot
Sep 29 2015 00:16

hint [5/8]

Hint: 3

You may lowercase the string using String.prototype.toLowerCase.

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Graham Whitley
@lotusgraham
Sep 29 2015 00:25
hint
CamperBot
@camperbot
Sep 29 2015 00:25

hint [6/8]

Spoiler Alert!

687474703a2f2f7777772e796f75726472756d2e636f6d2f796f75726472756d2f696d616765732f323030372f31302f31302f7265645f7761726e696e675f7369676e5f322e676966.gif

Solution ahead!

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Graham Whitley
@lotusgraham
Sep 29 2015 00:25
hint
CamperBot
@camperbot
Sep 29 2015 00:25

hint [7/8]

First

function palindrome(str) {
  var normalizedStr = str.replace(/[\W_]/g, '').toLowerCase();
  var reverseStr = normalizedStr.split('').reverse().join('');
  return normalizedStr === reverseStr;
}

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Graham Whitley
@lotusgraham
Sep 29 2015 00:27
hint
CamperBot
@camperbot
Sep 29 2015 00:27

hint [8/8]

Second

function palindrome(str) {
  str = str.toLowerCase().replace(/[\W_]/g, '');
  for(var i = 0, len = str.length - 1; i < len/2; i++) {
    if(str[i] !== str[len-i]) {
      return false;
    }
  }
  return true;
}

Code Explanation:

We use regular expressions to replace any uppercase letter into a lowercase. Then we check if the string is the same as the reversed string using split() to split the original string by characters, then reverse and then join it back together.

Credits:

If you found this page useful, you can give thanks by copying and pasting this on the main chat: Thanks @Rafase282 @abhisekp

NOTE: Please add your username only if you have added any relevant main contents to the wiki page. (Please don't remove any existing usernames.)

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Bhaskar Tejaswi
@bhaskarcodes
Sep 29 2015 17:34
hint seek and destroy
CamperBot
@camperbot
Sep 29 2015 17:34
These hints depend on people like you! Please add to this :point_right: Bonfire's Wiki Hints Page
Christopher Vicini
@ChristopherVicini
Sep 29 2015 19:46
hint
CamperBot
@camperbot
Sep 29 2015 19:46

hint [1/8]

## :construction: After this are possible spoiler hints.

Make sure you've tried to hard to solve it yourself before proceeding. :construction:

type hint for next hint :pencil: [Contribute at the FCC Wiki]

Christopher Vicini
@ChristopherVicini
Sep 29 2015 19:46
hint
CamperBot
@camperbot
Sep 29 2015 19:46

hint [2/8]

Explanation:

You have to check if the string you get as an input is a palindrome and return true if it is, and false otherwise.

type hint for next hint :pencil: [Contribute at the FCC Wiki]

Christopher Vicini
@ChristopherVicini
Sep 29 2015 19:46
hint
CamperBot
@camperbot
Sep 29 2015 19:46

hint [3/8]

Hint: 1

You may use regular expressions (RegExp) to remove unwanted characters from the string.

type hint for next hint :pencil: [Contribute at the FCC Wiki]

Christopher Vicini
@ChristopherVicini
Sep 29 2015 19:48
hint
CamperBot
@camperbot
Sep 29 2015 19:48

hint [4/8]

Hint: 2

You may use Array.prototype.split and Array.prototype.join methods or for loop.

type hint for next hint :pencil: [Contribute at the FCC Wiki]