From 5cde2691ea8d6dae23f2ce3967480ac9dd10f927 Mon Sep 17 00:00:00 2001
From: Crista Lopes <crista@tagide.com>
Date: Mon, 21 Oct 2013 17:07:36 -0700
Subject: [PATCH] Added spreadsheet style

---
 26-spreadsheet/README.md | 16 ++++++++++++++++
 26-spreadsheet/tf-26.py  | 38 ++++++++++++++++++++++++++++++++++++++
 2 files changed, 54 insertions(+)
 create mode 100644 26-spreadsheet/README.md
 create mode 100644 26-spreadsheet/tf-26.py

diff --git a/26-spreadsheet/README.md b/26-spreadsheet/README.md
new file mode 100644
index 0000000..77f4afc
--- /dev/null
+++ b/26-spreadsheet/README.md
@@ -0,0 +1,16 @@
+Style #26
+==============================
+
+Constraints:
+
+- The problem is modeled like a spreadsheet, with columns of data and formulas
+
+- Some data depends on other data according to formulas. When data
+  changes, the dependent data also changes automatically.
+
+
+Possible names:
+
+- Spreadsheet
+- Dataflow
+- Active data
diff --git a/26-spreadsheet/tf-26.py b/26-spreadsheet/tf-26.py
new file mode 100644
index 0000000..c068d12
--- /dev/null
+++ b/26-spreadsheet/tf-26.py
@@ -0,0 +1,38 @@
+import sys, re, itertools, operator
+
+#
+# The columns. Each column comprises of a data element and a formula.
+# The first 2 columns are the input data, so no formulas.
+#
+all_words = [(), None]
+stop_words = [(), None]
+non_stop_words = [(), lambda w : w if w not in stop_words[0] else '']
+unique_words = [(), lambda word_list: set([w for w in word_list if w != ''])]
+counts = [(), lambda w, word_list : word_list.count(w)]
+sorted_data = [(), lambda z : sorted(z, key=operator.itemgetter(1), reverse=True)]
+
+#
+# The active procedure over the columns of data.
+# Call this everytime the input data changes, or periodically.
+#
+def update():
+    global non_stop_words
+    global unique_words
+    global counts
+    global sorted_data
+    # Apply the formulas to the 4 last columns
+    non_stop_words[0] = map(non_stop_words[1], all_words[0])
+    unique_words[0] = unique_words[1](non_stop_words[0])
+    counts[0] = map(counts[1], unique_words[0], itertools.repeat(non_stop_words[0], len(unique_words[0])))
+    sorted_data[0] = sorted_data[1](zip(list(unique_words[0]), counts[0]))
+#
+# Load the fixed data into the first 2 columns
+#
+all_words[0] = re.findall('[a-z]{2,}', open(sys.argv[1]).read().lower())
+stop_words[0] = set(open('../stop_words.txt').read().split(','))
+# Update the columns with formulas
+update()
+
+# Display
+for (w, c) in sorted_data[0][:25]:
+    print w, '-', c