camperbot/bonfire-check-for-palindromes

joelauerbach0

@joelauerbach0

hint

CamperBot

@camperbot

hint [6/9]

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joelauerbach0

@joelauerbach0

hint

CamperBot

@camperbot

hint [7/9]

First

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

joelauerbach0

@joelauerbach0

hint

CamperBot

@camperbot

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.

onethreeeight

@onethreeeight

hint

CamperBot

@camperbot

hint [1/9]

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Oscar Gatamah

@gatamah

hint

CamperBot

@camperbot

hint [1/9]

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onethreeeight

@onethreeeight

hint

CamperBot

@camperbot

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.

Roko Medančić

@R0k0

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CamperBot

@camperbot

hint [1/9]

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Roko Medančić

@R0k0

hint

CamperBot

@camperbot

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.

codyWchamberlain

@codyWchamberlain

hint

CamperBot

@camperbot

hint [3/9]

Hint: 1

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

http://devdocs.io/#q=js+RegExp

codyWchamberlain

@codyWchamberlain

hint

CamperBot

@camperbot

hint [4/9]

Hint: 2

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

codyWchamberlain

@codyWchamberlain

hint

CamperBot

@camperbot

hint [5/9]

Hint: 3

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

http://devdocs.io/#q=js+String+toLowerCase

codyWchamberlain

@codyWchamberlain

hint

CamperBot

@camperbot

hint [6/9]

Spoiler Alert!

Solution ahead!

codyWchamberlain

@codyWchamberlain

hint

CamperBot

@camperbot

hint [7/9]

First

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

karenkomine

@karenkomine

Can someone explain the stuff that is inside .replace in var normalizedStr?

karenkomine

@karenkomine

Why do we used ' ' ' /[\W_]/g ' ' ' ?

/[\W_]/g

In str.replace?

karenkomine

@karenkomine

How would you set up your code so that in a for loop, you check every single word in an array and you stop the for loop when you find the longest string in that array?

Ahmed Othman

@ahmedgothman

@karenkomine /[\W_]/g is for word characters similiar to [A-Za-z0-9]

@karenkomine sorry i thought it was a recent comment:D

Shruti Hardat

@shrutihardat

hint

CamperBot

@camperbot

hint [1/9]

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Shivang

@shivang207

hint Record Collection

CamperBot

@camperbot

hint [1/9]

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Kunal

@kunalg1

hint

CamperBot

@camperbot

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.

Kunal

@kunalg1

hint

CamperBot

@camperbot

hint [3/9]

Hint: 1

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

http://devdocs.io/#q=js+RegExp

Kunal

@kunalg1

hint

CamperBot

@camperbot

hint [4/9]

Hint: 2

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

Wilbert

@moogler

hint

CamperBot

@camperbot

hint [1/12]

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Wilbert

@moogler

hit=nt

hint

CamperBot

@camperbot

hint [2/12]

Explanation:

Our goal for solving this problem is tidying up the string passed in, and checking whether it is in fact a palindrome.

If you are unsure of what a palindrome is, it is a word or phrase that when reversed spells the same thing forwards or backwards. A simple example is mom, when you reverse the letters, it spells the same thing! Another example of a palindrome is race car. When we take out anything that is not a character it becomes racecar which is the same spelled forwards or backwards!

Once we have determined whether it is a palindrome or not we want to return either true or false based on our findings.

Wilbert

@moogler

hint

CamperBot

@camperbot

hint [3/12]

Hint: 1

Regular expressions, RegEx, can be used to remove unwanted characters from the string.

http://devdocs.io/#q=js+RegExp

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