Merge pull request #48 from jamesfzhang/master

A few solutions in ruby

Author: blakeembrey

factorial/factorial.rb

@@ -0,0 +1,4 @@
+def factorial(n)
+  return 1 if n < 2
+  n * factorial(n - 1)
+end

fibonacci/fib.rb

@@ -0,0 +1,5 @@
+def fib(n)
+  return 0 if n == 0
+  return 1 if n == 1 || n == 2
+  fib(n - 2) + fib(n - 1)
+end

integer-length/int_length.rb

@@ -0,0 +1,4 @@
+def int_length(num)
+  return 1 if num.abs < 10
+  1 + int_length(num / 10)
+end

multiples-of-3-and-5/multiples_of_three_and_five.rb

@@ -0,0 +1,3 @@
+def multiples_of_three_and_five
+  (1...1000).to_a.select { |num| num % 3 == 0 || num % 5 == 0 }.reduce(&:+)
+end

odd-occuring-element/odd_occuring_element.rb

@@ -0,0 +1,5 @@
+def odd_occuring_element(array)
+  array.uniq.each do |num|
+    return num if array.count(num) % 2 != 0
+  end
+end

remove-duplicates-from-string/remove_duplicates.rb

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+def remove_duplicates(str)
+  str.split("").uniq.join
+end

reverse-words-in-string/reverse_words.rb

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+def reverse_words(array)
+  array.split(" ").reverse.join(" ")
+end

shortest-fizz-buzz/shortest_fizz_buzz.rb

@@ -0,0 +1,3 @@
+def shortest_fizz_buzz
+  (1..100).to_a.each{|i|puts i%3==0&&i%5==0 ? "FizzBuzz": i%3==0 ? "Fizz": i%5==0 ? "Buzz": i}
+end

sum-of-array-plus-one/sum_plus_one.rb

@@ -0,0 +1,3 @@
+def sum_plus_one(array)
+  array.reduce(&:+) + array.size
+end

word-positions/word_position.rb

@@ -0,0 +1,8 @@
+def word_position(text, word)
+  text = text.split(" ")
+  positions = []
+  text.each_index do |i|
+    positions << i if text[i] == word
+  end
+  return positions
+end