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

17th
Dec 2015
danieljuiche
@danieljuiche
Dec 17 2015 06:44
hint
CamperBot
@camperbot
Dec 17 2015 06:44

hint [4/9]

Hint: 2

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

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danieljuiche
@danieljuiche
Dec 17 2015 06:44
hint 1
CamperBot
@camperbot
Dec 17 2015 06:44

hint [2/9]

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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danieljuiche
@danieljuiche
Dec 17 2015 06:45
hint 1
CamperBot
@camperbot
Dec 17 2015 06:45

hint [2/9]

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]

danieljuiche
@danieljuiche
Dec 17 2015 06:45
hint 0
CamperBot
@camperbot
Dec 17 2015 06:45

hint [1/9]

## :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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danieljuiche
@danieljuiche
Dec 17 2015 06:45
hint 1
CamperBot
@camperbot
Dec 17 2015 06:45

hint [2/9]

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]

danieljuiche
@danieljuiche
Dec 17 2015 06:45
hin 2
hint 2
CamperBot
@camperbot
Dec 17 2015 06:45

hint [3/9]

Hint: 1

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

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danieljuiche
@danieljuiche
Dec 17 2015 06:45
hint 3
CamperBot
@camperbot
Dec 17 2015 06:45

hint [4/9]

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]

danieljuiche
@danieljuiche
Dec 17 2015 06:45
hint 4
CamperBot
@camperbot
Dec 17 2015 06:45

hint [5/9]

Hint: 3

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

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danieljuiche
@danieljuiche
Dec 17 2015 06:45
hint 5
CamperBot
@camperbot
Dec 17 2015 06:45

hint [6/9]

Spoiler Alert!

687474703a2f2f7777772e796f75726472756d2e636f6d2f796f75726472756d2f696d616765732f323030372f31302f31302f7265645f7761726e696e675f7369676e5f322e676966.gif

Solution ahead!

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

danieljuiche
@danieljuiche
Dec 17 2015 06:45
hint
CamperBot
@camperbot
Dec 17 2015 06:45

hint [7/9]

First

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

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danieljuiche
@danieljuiche
Dec 17 2015 06:45
hint
CamperBot
@camperbot
Dec 17 2015 06:45

hint [8/9]

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.

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