Maryam's reverse words

lib/reverse_words.rb

@@ -1,4 +1,61 @@
-# A method to reverse each word in a sentence, in place.
+# # A method to reverse each word in a sentence, in place.
+require 'pry'
+
+def reverse_one_word(word, start = 0, finish = word.length)
+  if word == nil
+    return nil
+  end
+
+  i = start
+  index = finish
+
+  while i < index
+    first_letter = word[i]
+    last_letter = word[index]
+
+    word[i] = last_letter
+    word[index] = first_letter
+
+    i += 1
+    index -= 1
+  end
+
+  return word
+end
+
 def reverse_words(my_words)
-  raise NotImplementedError
+  if my_words == nil
+    return nil
+  end
+
+  current_index = 0
+
+  start = nil
+  finish = nil
+
+  while current_index < my_words.length
+    currently_on_letter = my_words[current_index] != " "
+    currently_on_space = my_words[current_index] == " "
+    at_end_of_string = current_index == my_words.length - 1
+
+    if start == nil && currently_on_letter
+      start = current_index
+    end
+
+    if start && currently_on_space
+      finish = current_index - 1
+    end
+
+    if start && at_end_of_string
+      finish = current_index
+    end
+
+    if start && finish
+      reverse_one_word(my_words, start, finish)
+      start = nil
+      finish = nil
+    end
+
+    current_index += 1
+  end
 end

specs/reverse_words_spec.rb

@@ -1,6 +1,7 @@
 require 'minitest/autorun'
 require 'minitest/reporters'
 require_relative '../lib/reverse_words'
+require 'pry'
 
 describe "reverse words" do
   describe "basic tests" do
@@ -23,6 +24,7 @@
 
   # check for edge cases
   describe "edge cases" do
+
     # if it's a string parameter, check for empty
     it "reverse each word in an empty sentence" do
       test_string = ""