From 5407dc7dbd99ae3415991ab94ccb42a586f1ded4 Mon Sep 17 00:00:00 2001
From: Micah Denbraver <macromicah@gmail.com>
Date: Mon, 15 Sep 2014 23:55:59 -0700
Subject: [PATCH] Highlight example between for loop and list comprehension

Fixes #17
---
 part-4.ipynb | 35 +++++++++++++++++++++++++++++++++--
 1 file changed, 33 insertions(+), 2 deletions(-)

diff --git a/part-4.ipynb b/part-4.ipynb
index 385d7f9..5a5e269 100644
--- a/part-4.ipynb
+++ b/part-4.ipynb
@@ -1,7 +1,7 @@
 {
  "metadata": {
   "name": "",
-  "signature": "sha256:40f96dd4a9a68767b80bf16809c2b3aebd08f6893eb2d01994fd18e611864f26"
+  "signature": "sha256:d806710bd05c6f416dc3842515677b9246aa116881cfd0f7dd2c6b748a3a67e5"
  },
  "nbformat": 3,
  "nbformat_minor": 0,
@@ -110,13 +110,44 @@
      "cell_type": "markdown",
      "metadata": {},
      "source": [
-      "Note how our list comprehension is written within the brackets: The for-loop statement is written at the end whereas the action inside of the for-loop is written first: n * n"
+      "Let's compare the two methods real quick by highlighting the different logical parts."
      ]
     },
     {
      "cell_type": "markdown",
      "metadata": {},
      "source": [
+      "First written as a conventional 'for' loop:\n",
+      "<pre>\n",
+      "<span style=\"background:orange\">squared_numbers</span> = []\n",
+      "<span style=\"background:cyan\">for n in</span> <span style=\"background:yellowgreen\">my_favorite_numbers</span>:\n",
+      "&nbsp;&nbsp;&nbsp;&nbsp;squared_numbers.append(<span style=\"background:pink\">n * n</span>)\n",
+      "</pre>"
+     ]
+    },
+    {
+     "cell_type": "markdown",
+     "metadata": {},
+     "source": [
+      "And then written as a list comprehension:\n",
+      "<pre>\n",
+      "<span style=\"background:orange\">squared_numbers</span> = [<span style=\"background:pink\">n * n</span> <span style=\"background:cyan\">for n in</span> <span style=\"background:yellowgreen\">my_favorite_numbers</span>]\n",
+      "</pre>"
+     ]
+    },
+    {
+     "cell_type": "markdown",
+     "metadata": {},
+     "source": [
+      "Look for the <span style=\"background:orange\">new list</span> being created, the <span style=\"background:cyan\">iteration</span> being done over the <span style=\"background:yellowgreen\">orignal list</span> and the <span style=\"background:pink\">transformation</span> being done on each element. List comprehensions are just a cleaner way of building lists from other iterables."
+     ]
+    },
+    {
+     "cell_type": "markdown",
+     "metadata": {},
+     "source": [
+      "### Improving our work\n",
+      "\n",
       "Let's revisit a problem we've already solved in Danny's lecture on list:\n",
       "\n",
       "Pick every name from a list that begins with a vowel.\n",