qfluis / katasjs

katasJS

Repo con fines educativos 🤓.

Si tienes sugerencias de mejora del código me lo puedes indicar sin problema 🙂.

Clase Poligonos Regulares - 2022-04-19

Clase que contiene varios métodos útiles si trabajamos con poligonos regulares.

Carpeta 01-poligonos-regulares

LargestSubarraySum - 2022-04-19

Dado un array de números enteros desordenados y un número n, encontrar el subarray con tamaño n que tenga la mayor suma.

Carpeta 02-largestsubarraysum

Create Phone Number - 2022-04-20

Write a function that accepts an array of 10 integers (between 0 and 9), that returns a string of those numbers in the form of a phone number.

createPhoneNumber([1, 2, 3, 4, 5, 6, 7, 8, 9, 0]) // => returns "[phone]"

Carpeta 03-codewars-phone-number

Sum of Digits / Digital Root - 2022-04-21

Digital root is the recursive sum of all the digits in a number.

Given n, take the sum of the digits of n. If that value has more than one digit, continue reducing in this way until a single-digit number is produced. The input will be a non-negative integer.

    16  -->  1 + 6 = 7
   942  -->  9 + 4 + 2 = 15  -->  1 + 5 = 6
132189  -->  1 + 3 + 2 + 1 + 8 + 9 = 24  -->  2 + 4 = 6
493193  -->  4 + 9 + 3 + 1 + 9 + 3 = 29  -->  2 + 9 = 11  -->  1 + 1 = 2

Carpeta 04-codewars-sum-of-digits

Hand Challenge - 2022-04-23

You find a strange mirror that always shows a hand that is moving. The hand appears to be alive, and after a lot of questions of "yes" and "no" answer, you know that the hand is trying to teach you a program that is written in HPL (Hand Programming Language)... View more info in folder 05-hand-challenge.

ROTH-13 - 2022-04-24

How can you tell an extrovert from an introvert at NSA? Va gur ryringbef, gur rkgebireg ybbxf ng gur BGURE thl'f fubrf. I found this joke on USENET, but the punchline is scrambled. Maybe you can decipher it? According to Wikipedia, ROT13 (http://en.wikipedia.org/wiki/ROT13) is frequently used to obfuscate jokes on USENET. Hint: For this task you're only supposed to substitue characters. Not spaces, punctuation, numbers etc. Test examples:

"EBG13 rknzcyr." -->
"ROT13 example."

"This is my first ROT13 excercise!" -->
"Guvf vf zl svefg EBG13 rkprepvfr!"

folder 06-roth-13.

Nth Fibonacci - 2022-04-24

I would like for you to write me a function that when given a number (n) returns the n-th number in the Fibonacci Sequence.

For example:

   nthFibo(4) == 2

Because 2 is the 4th number in the Fibonacci Sequence. For reference, the first two numbers in the Fibonacci sequence are 0 and 1, and each subsequent number is the sum of the previous two. folder 07-n-th-fibonacci.

Value of X - 2022-04-24

Jack's teacher gave him a ton of equations for homework. The thing is they are all kind of same so they are boring.

So help him by making a equation solving function that will return the value of x.

Test Cases will be like this:

# INPUT            # RETURN
'x + 1 = 9 - 2'    # 6
'- 10 = x'         # -10
'x - 2 + 3 = 2'    # 1
'- x = - 1'        # 1

• All test cases are valid.
• Every +, - and numbers will be separated by space.
• There will be only one x either on the left or right.
• x can have a - mark before it.
• returned object will be a integer.

folder 08-value-of-x.

Convert number to reversed array of digits - 2022-04-25

Given a random non-negative number, you have to return the digits of this number within an array in reverse order.

Example:

348597 => [7,9,5,8,4,3]
0 => [0]

folder 09-number-2-reversed-array-digits.

Sudoku Solution Validator - 2022-04-25

Programa que chequea si un sudoku está correctamente solucionado.

folder 10-sudoku-solution-validator.

Anagrams array - 2022-04-25

What is an anagram? Well, two words are anagrams of each other if they both contain the same letters. For example:

'abba' & 'baab' == true
'abba' & 'bbaa' == true
'abba' & 'abbba' == false
'abba' & 'abca' == false

Write a function that will find all the anagrams of a word from a list. You will be given two inputs a word and an array with words. You should return an array of all the anagrams or an empty array if there are none. For example:

anagrams('abba', ['aabb', 'abcd', 'bbaa', 'dada']) => ['aabb', 'bbaa']
anagrams('racer', ['crazer', 'carer', 'racar', 'caers', 'racer']) => ['carer', 'racer']
anagrams('laser', ['lazing', 'lazy',  'lacer']) => []

folder 11-anagrams-array.

Regex password validator - 2022-04-25

You need to write regex that will validate a password to make sure it meets the following criteria:

• At least six characters long
• contains a lowercase letter
• contains an uppercase letter
• contains a number Valid passwords will only be alphanumeric characters. folder 12-regex-password.

Domain name - 2022-04-25

Obtener el nombre de dominio de una url. folder 13-domain-name.

Merge intervals - 2022-04-26

Given an array of intervals, merge the overlapping intervals, and return an array of the resulting intervals.

folder 14-merge-intervals.

Roman Numerals Helper - 2022-04-26

Create a RomanNumerals class that can convert a roman numeral to and from an integer value. It should follow the API demonstrated in the examples below. Multiple roman numeral values will be tested for each helper method.

Modern Roman numerals are written by expressing each digit separately starting with the left most digit and skipping any digit with a value of zero. In Roman numerals 1990 is rendered: 1000=M, 900=CM, 90=XC; resulting in MCMXC. 2008 is written as 2000=MM, 8=VIII; or MMVIII. 1666 uses each Roman symbol in descending order: MDCLXVI.

Input range : 1 <= n < 4000

In this kata 4 should be represented as IV, NOT as IIII (the "watchmaker's four").

folder 15-roman-numerals-helper.