Number shuffle

| Programming | 0 Comments

Completed and solved my first problem of the year. I know that today is only the first day of the year, but why wait when there are so many interesting challenges to pursue in life? Here is what I encountered on the RubyMonk website.

Problem Statement:
Given a 3 or 4 digit number with distinct digits, return a sorted array of all the unique numbers than can be formed with those digits.

Example:
Given: 123
Return: [123, 132, 213, 231, 312, 321]

My solution:

def number_shuffle(number)
  number.to_s.split(//).permutation.to_a.map {|a| a.join.to_i }
end

Tutorial solution:

def number_shuffle(number)
  no_of_combinations = number.to_s.size == 3 ? 6 : 24
  digits = number.to_s.split(//)
  combinations = []
  combinations << digits.shuffle.join.to_i while combinations.uniq.size!=no_of_combinations
  combinations.uniq.sort
end

My solution is not only conciser but in my opinion more elegant as well. Applying Occam's razor principle here, I'll let you decide for yourself

Leave a comment

Random entries

Here are some random entries that you might be interested in:

Recent Assets

  • flitsfoto-B5H3-IoN-b9E4tr9OrFarmWfWrP5pxuN8AgYw45ABAnqqDrmjSqIc-KKoAQ9Bu_k.jpeg
  • flitsfoto-mjuWdZ1wBk6gJbu9rP7Bu6bETxZplWXFUoEJIA_HfMF0i0MQfgF_y5024mEsOBfH.jpeg
  • Kiffin-10th-hole-2017-05-small.jpg
  • Kiffin-10th-hole-2017-05.jpg
  • ember-rails-and-json-api.png
  • screenshot-www.golf.nl-2017-05-04-15-38-01.png
  • putting-mat.png
  • finished-just-in-time.png
  • Tenerife-flight-path.png
  • listen-to-me-marlon.jpg
  • sneeuwval.jpg
  • frozen-crystals.png

Golf Handicap

Information

This personal weblog was started way back on July 21, 2001 which means that it is 7-21-2001 old.

So far this blog contains no less than 2288 entries and as many as 1877 comments.

Important events

Graduated from Stanford 6-5-1979 ago.

Kiffin Rockwell was shot down and killed 9-23-1916 ago.

Believe it or not but I am 10-11-1957 young.

Began well-balanced and healthy life style 1-8-2013 ago.

My father passed away 10-20-2000 ago.

First met Thea in Balestrand, Norway 6-14-1980 ago.