finish number finder exercise

exercises/book_search.livemd

@@ -49,7 +49,7 @@ defmodule Book do
 
   Include books that partially match the search query.
   # does the query match any letter of the title?
-  # split the title string and enum.filter over query
+  # use String.contains(book, query)
 
     iex> Book.search([%Book{title: "ABC"}], "A")
     [%Book{title: "ABC"}]
@@ -63,29 +63,29 @@ defmodule Book do
     iex> Book.search([%Book{title: "ABC"}], "a")
     [%Book{title: "ABC"}]
   """
-  def fuzzy_match(string, char) do
-    mysplit = String.split(string, "", trim: true)
-    Enum.filter(mysplit, fn element -> element == char end) && string
-  end
+
+  # def fuzzy_match(string, char) do
+  #   mysplit = String.split(string, "", trim: true)
+  #   Enum.filter(mysplit, fn element -> element == char end) && string
+  # end
 
   def search(books, query) do
-    # books that exactly match
-    # Enum.filter(books, fn book -> Map.get(book, :title) == query end)
-    book = Enum.filter(books, fn book -> Map.get(book, :title) end)
-    String.contains?(book, query)
+    # books that match one letter
+    Enum.filter(books, fn book -> String.contains?(book, query) end)
+
+    # books that exactly match   
+    Enum.filter(books, fn book -> Map.get(book, :title) end)
   end
 end
 ```
 
 ```elixir
-mytitle = "ABC"
-myquery = "A"
-
-mysplit = String.split(mytitle, "", trim: true)
-# split string
-# filter split string to see if any char == query
-# if filter returns a match then return title
-Enum.filter(mysplit, fn char -> myquery == char end) && mytitle
+book = "ABC"
+query = "D"
+String.contains?(book, query)
+
+test = %{mybook: "mytitle"}
+Map.get(test, )
 ```
 
 ## Mark As Completed

exercises/number_finder.livemd

@@ -37,12 +37,21 @@ defmodule NumberFinder do
 
     iex> NumberFinder.smallest([2, 3, 1])
     1
+
     iex> NumberFinder.smallest([2, 2, 3, 4])
     2
+
     iex> NumberFinder.smallest([2, 2, 3, 4, 10, 20, -3])
     -3
   """
   def smallest(number_list) do
+    Enum.reduce(number_list, fn elem, acc ->
+      if acc < elem do
+        acc
+      else
+        elem
+      end
+    end)
   end
 
   @doc """
@@ -52,12 +61,21 @@ defmodule NumberFinder do
 
     iex> NumberFinder.largest([2, 3, 1])
     3
+
     iex> NumberFinder.largest([2, 2, 3, 4, 4])
     4
+
     iex> NumberFinder.largest([2, 2, 3, 4, 10, 20, -3])
     20
   """
   def largest(number_list) do
+    Enum.reduce(number_list, fn elem, acc ->
+      if acc > elem do
+        acc
+      else
+        elem
+      end
+    end)
   end
 end
 ```

exercises/weighted_voting.livemd

@@ -82,12 +82,21 @@ defmodule WeightedVoting do
 
     iex> WeightedVoting.count([dogs: 20, dogs: 10], :dogs)
     30
+
     iex> WeightedVoting.count([cats: 10, dogs: 20, dogs: 30], :dogs)
     50
+
     iex> WeightedVoting.count([cats: 10, dogs: 20, dogs: 10, cats: 30], :cats)
     40
   """
   def count(votes, vote_to_count) do
+    Enum.reduce(votes, 0, fn {key, value}, acc ->
+      if key == vote_to_count do
+        acc + value
+      else
+        acc
+      end
+    end)
   end
 
   @doc """
@@ -100,16 +109,35 @@ defmodule WeightedVoting do
 
     iex> WeightedVoting.tally([dogs: 20, dogs: 10])
     [dogs: 30]
+
     iex> WeightedVoting.tally([cats: 10, dogs: 20, dogs: 10])
     [cats: 10, dogs: 30]
+
     iex> WeightedVoting.tally([cats: 10, dogs: 20, cats: 20, dogs: 10, birds: 20])
     [birds: 20, cats: 30, dogs: 30]
   """
   def tally(votes) do
+    Enum.reduce(votes, [], fn {animal, value}, acc ->
+      Keyword.update(acc, animal, value, fn existing_value ->
+        value + existing_value
+      end)
+    end)
+    |> Enum.sort()
   end
 end
 ```
 
+```elixir
+votes = [cats: 10, dogs: 20, cats: 20, dogs: 10, birds: 20]
+vote_to_count = :birds
+
+def count(votes, vote_to_count) do
+  Enum.reduce(votes, fn acc, vote_to_count ->
+    IO.inspect(binding())
+  end)
+end
+```
+
 ### Bonus: Tally Map
 
 Create a `WeightedVoting.tally_map/1` function which returns a map instead of a keyword list.

progress.json

@@ -49,7 +49,7 @@
   "dominoes_exercise": false,
   "command_line_family_tree_exercise": false,
   "phoenix_and_ecto_reading": false,
-  "number_finder_exercise": false,
+  "number_finder_exercise": true,
   "pic_chat_image_upload_reading": false,
   "timeline_exercise": false,
   "newsletter_reading": false,