I really love this site Codewars.com and their coding challenges, I wonder if there are coders here who use the platform, let's meet and maybe we might just form our own clan (maybe we could call it "Naira code ninjas" lol)

Fr4nk:
I really love this site Codewars.com and their coding challenges, I wonder if there are coders here who use the platform, let's meet and maybe we might just form our own clan (maybe we could call it "Naira code ninjas" lol)

I have stopped Codewars.com, but I'm in for some coding challenges, you interested?

Altairx440:

I have stopped Codewars.com, but I'm in for some coding challenges, you interested?

Sure

Fr4nk:


Sure

Say, I give a coding challenge, you solve and post your solution, if possible with the Big O/complexity and you do same. Is this approach ok?

Altairx440:

Say, I give a coding challenge, you solve and post your solution, if possible with the Big O/complexity and you do same. Is this approach ok?

Maybe, just to be clear I no too sabi, but I love a good challenge, so expect rubbish code that works lol

Fr4nk:


Maybe, just to be clear I no too sabi, but I love a good challenge, so expect rubbish code that works lol

Lol its OK, you should go first then, post a challenge you are comfortable solving, we could just be on the same level since we are age mates.

Altairx440:

Lol its OK, you should go first then, post a challenge you are comfortable solving, we could just be on the same level since we are age mates.

Age mates (I'm guessing you checked my profile).
Okay bro
My main language is python,
I'm still in limbo between intermediate and advanced but I'll try best.
I just started Data structures and algorithms so I haven't really learnt Asymptotic notation and all those Big O analysis stuff

You are given an integer, . Your task is to print an alphabet rangoli of size . (Rangoli is a form of Indian folk art based on creation of patterns.)

Different sizes of alphabet rangoli are shown below:

#size 3

----c----
--c-b-c--
c-b-a-b-c
--c-b-c--
----c----

#size 5

--------e--------
------e-d-e------
----e-d-c-d-e----
--e-d-c-b-c-d-e--
e-d-c-b-a-b-c-d-e
--e-d-c-b-c-d-e--
----e-d-c-d-e----
------e-d-e------
--------e--------

#size 10

------------------j------------------
----------------j-i-j----------------
--------------j-i-h-i-j--------------
------------j-i-h-g-h-i-j------------
----------j-i-h-g-f-g-h-i-j----------
--------j-i-h-g-f-e-f-g-h-i-j--------
------j-i-h-g-f-e-d-e-f-g-h-i-j------
----j-i-h-g-f-e-d-c-d-e-f-g-h-i-j----
--j-i-h-g-f-e-d-c-b-c-d-e-f-g-h-i-j--
j-i-h-g-f-e-d-c-b-a-b-c-d-e-f-g-h-i-j
--j-i-h-g-f-e-d-c-b-c-d-e-f-g-h-i-j--
----j-i-h-g-f-e-d-c-d-e-f-g-h-i-j----
------j-i-h-g-f-e-d-e-f-g-h-i-j------
--------j-i-h-g-f-e-f-g-h-i-j--------
----------j-i-h-g-f-g-h-i-j----------
------------j-i-h-g-h-i-j------------
--------------j-i-h-i-j--------------
----------------j-i-j----------------
------------------j------------------
The center of the rangoli has the first alphabet letter a, and the boundary has the alphabet letter (in alphabetical order).

Function Description

Complete the rangoli function in the editor below.

rangoli has the following parameters:

int size: the size of the rangoli
Returns

string: a single string made up of each of the lines of the rangoli separated by a newline character (\n)
Input Format

Only one line of input containing , the size of the rangoli.

Constraints


Sample Input

5
Sample Output

--------e--------
------e-d-e------
----e-d-c-d-e----
--e-d-c-b-c-d-e--
e-d-c-b-a-b-c-d-e
--e-d-c-b-c-d-e--
----e-d-c-d-e----
------e-d-e------
--------e--------

https://www.hackerrank.com/challenges/alphabet-rangoli/problem?isFullScreen=false

I got this from hackerrank, check out the link for better understanding

Fr4nk:


Age mates (I'm guessing you checked my profile).
Okay bro
My main language is python,
I'm still in limbo between intermediate and advanced but I'll try best.
I just started Data structures and algorithms so I haven't really learnt Asymptotic notation and all those Big O analysis stuff

I saw your post on some data science thread, that's how I found out. I use python too though just for the time being, I too have not taking a DSA course but I've already got the hang of Big O, so just ignore it.

I came up with two different ways to solve this problem, and after implementing them they both work just fine, So I'm posting both solutions.

I'm unable to post the python code, I'll try again tomorrow.

# solution 1:

def segment(i, n):
  result, m = [n], n
  for _ in range(i):
    m -= 1
    result.append(m)
  for j in range(len(result)-2, -1, -1):
    result.append(result[j])
  return result
  
def fill(arr, n): 
  str = "-".join(arr)
  i = len(str)
  while i < n:
    str += "-"
    str = "-" + str
    i += 2
  return str

def print_rangoli(n):
  size = n + (n - 1) * 3
  base = []
  for i in range(n):
    arr = segment(i, n)
    for i in range(len(arr)):
      k = arr[i] % 27
      f = chr
      arr[i] = f(96 + k)
    str = fill(arr, size)
    base.append(str)
  for j in range(n-2, -1, -1):
    base.append(base[j])
  base = "\n".join(base)
  print(base)
   

.

.

.

# solution 2:

def print_rangoli(x):
   f = chr
   for i in range(x-1, -1, -1):
     for j in range(i):
       print("-", end="-" )  
     for k in range(x, i, -1):
       k = f(96 + (k % (27)))
       print(k, end=("-" if x != 1 else "")     
     for l in range(i+1, x):
       ll = f(96 + (l+1 % (27)))
       print(ll, end=("" if (i==0 and l==x-1) else "-")
     for m in range(i):
       print("-", end=("-" if m != 0 else "")   
     print()
     
   for i in range(1, x):
     for j in range(i):
       print("-", end="-" )
     for k in range(x, i, -1):
       k = f(96 + (k % (27)))
       print(k, end="-" )
     for l in range(i+1, x):
       l = f(96 + (l+1 % (27)))
       print(l, end="-" )
     for m in range(i):
       print("-", end=("-" if m != 0 else "")
     print()
 

These are way too complex bro,
I'll test them out

The first one worked well

Second one worked well too

Here's my solution

Fr4nk:
Here's my solution

Nice solution bro, You should also be the posting the source code of your solutions so I can test yours as well.
Nairaland flags the "chr" function call, so you'll have to swap names in your solutions just like i did.

You're given s, a string with an arbitrary number of headers and rows in the formats below;

s1 = "Country\tState\tTown\r\nNigeria\tLagos
State\tLagos\r\nUSA\tTexas\tDallas\r\n"
s2 = "Country\r\nUSA\r\nChina;
s3 = "Name\tAge\r\n"

return an array of objects in the format below;

# s1
[
    {
     'Country': 'Nigeria',
     'State': 'Lagos State',
     'Town': 'Lagos'
    },
    {
     'Country': 'USA',
     'State': 'Texas',
     'Town': 'Dallas'
    }
]
# s2
[
    {
     'Country': USA'
    },
    {
     'Country': 'China'
    }
]
# s3
[]

Altairx440:
You're given s, a string with an arbitrary number of headers and rows in the formats below;

s1 = "Country\tState\tTown\r\nNigeria\tLagos
State\tLagos\r\nUSA\tTexas\tDallas\r\n"
s2 = "Country\r\nUSA\r\nChina;
s3 = "Name\tAge\r\n"

return an array of objects in the format below;

# s1
[
    {
     'Country': 'Nigeria',
     'State': 'Lagos State',
     'Town': 'Lagos'
    },
    {
     'Country': 'USA',
     'State': 'Texas',
     'Town': 'Dallas'
    }
]
# s2
[
    {
     'Country': USA'
    },
    {
     'Country': 'China'
    }
]
# s3
[]

Why is s3 an empty list?

Fr4nk:


Why is s3 an empty list?

List s3 is an empty list because string s3 contains a header with no accompanying rows, specifically, string s3 has a "Name" and "Age" column, but no rows, you should not create an empty object.

Okay cool,
Your calling them objects, aren't they dictionaries lol
You sound like someone coming from JavaScript

Fr4nk:
Okay cool,
Your calling them objects, aren't they dictionaries lol
You sound like someone coming from JavaScript

Of course, JavaScript was my first language lol, plus it's mostly called "object" or "map/hashmap" in other languages.

Is any other language allowed?

Altairx440:

Of course, JavaScript was my first language lol, plus it's mostly called "object" or "map/hashmap" in other languages.

Yeah dictionaries / objects are Hashmaps,
Any language is allowed sir

excanny:
Is any other language allowed?

Yes!

Fr4nk:


Yeah dictionaries / objects are Hashmaps

Yeah, also seems like you did not learn JavaScript, is Python the only language you know?

Got it working in C#

Altairx440:

Yeah, also seems like you did not learn JavaScript, is Python the only language you know?

Yes sir, python only, I may learn other languages like Javascript(soon because I want to work with flask or Django), R, C++ or Java or C# later, but being a python expert is d main goal