Christinas-reverse-words.rb

Christina's-reverse-words.rb

@@ -0,0 +1,35 @@
+# A method to reverse each word in a sentence, in place.
+
+def partial_reverse(my_string, starting, ending)
+  i = starting
+  j = ending
+  while i < j
+    temp = my_string[i]
+    my_string[i] = my_string[j]
+    my_string[j] = temp
+    i += 1
+    j -= 1
+  end
+  return
+end
+
+def reverse_words(my_words)
+  return if (my_words == nil || my_words.length == 0)
+
+  i = 0
+  total = my_words.length
+  while i < total
+    while my_words[i] == ' ' && i < total
+      i += 1
+    end
+    start_index = i
+
+    while my_words[i] != ' ' && i < total
+      i += 1
+    end
+    end_index = i - 1
+
+    partial_reverse(my_words, start_index, end_index)
+  end
+  return
+end

sherman-christina.rb

@@ -0,0 +1,14 @@
+def string_reverse(my_string)
+  return nil if my_string == nil
+  mid = my_string.length / 2
+  last = my_string.length - 1
+  temp = ""
+  i = 0
+  while i < mid
+    temp = my_string[i]
+    my_string[i] = my_string[last - i]
+    my_string[last - i] = temp
+    i += 1
+  end
+  return temp
+end