Added some comments

Author: nukala.akhil

pset1/credit.c

@@ -10,8 +10,10 @@ int main(void)
     long long num = get_long_long();
 
     int total = 0;
+    // check fo valid digits
     if (validNumDigits(num))
     {
+        // check for the conditions given in the spec
         total = getSum(num);
         if (total % 10 == 0)
         {
@@ -48,9 +50,13 @@ int main(void)
     }
 }
 
+/*
+    return whether card has valid num of digits
+*/
 bool validNumDigits(long long num)
 {
     int count = 0;
+    
     while (num > 0)
     {
         count++;
@@ -66,12 +72,21 @@ bool validNumDigits(long long num)
     }
 }
 
+/*
+    return the sum of the credit card
+    alternate digits are multiplied by 2
+*/
 int getSum(long long num)
 {
+    
     int sum = 0;
+    
+    // maintain count for alternating 
     int count = 1;
+    
     while (num > 0)
     {
+        // if alternate...if (num > 4) ==> 5*2 = 10 ==> sum=1 similary remaining
         if (count % 2 == 0)
         {
             int rem = num % 10;
@@ -105,7 +120,11 @@ int getSum(long long num)
             int rem = num % 10;
             sum += rem;
         }
+        
+        // count from right to left
         num = num/10;
+        
+        
         count++;
     }
     return sum;

pset5/speller/dictionary.c

@@ -33,6 +33,7 @@ void release(node *ptr);
 bool check(const char *word)
 {
     node *trav = root;
+    // for each letter in the word
     for (int i = 0, n = strlen(word); i< n; i++)
     {
         if (word[i] == '\'')
@@ -59,6 +60,7 @@ bool check(const char *word)
         }
 
     }
+    // check whether the isword is true
     if (trav->isword == true)
     {
         return true;
@@ -157,6 +159,7 @@ bool unload(void)
 void release(node *ptr)
 {
     node *parent = ptr;
+    // recursively release the node...back-tracking
     for (int i = 0; i < 27; i++)
     {
         if (ptr->character[i] != NULL)

pset6/sentiments/analyzer.py

@@ -5,6 +5,7 @@ class Analyzer():
 
     def __init__(self, positives, negatives):
         """Initialize Analyzer."""
+        # open positives and add to the positives set
         self.positives = set()
         self.negatives = set()
         with open(positives) as lines:
@@ -13,22 +14,24 @@ def __init__(self, positives, negatives):
                     clean = line.strip()
                     if clean:
                         self.positives.add(clean.lower())
+        # open negatives and add to the negatives set
         with open(negatives) as lines:
             for line in lines:
                 if not line.startswith(';'):
                     clean = line.strip()
                     if clean:
                         self.negatives.add(clean.lower())
 
-        # TODO
+        
 
     def analyze(self, text):
         """Analyze text for sentiment, returning its score."""
-
-        # TODO
+        
+        # break into tokens
         tokenizer = nltk.tokenize.TweetTokenizer()
         tokens = tokenizer.tokenize(text)
         tot = 0
+        # count the total score
         for token in tokens:
             if token.lower() in self.positives:
                 tot += 1

pset6/sentiments/application.py

@@ -41,7 +41,6 @@ def search():
                 negative += 1
             else:
                 neutral += 1
-    # TODO
 
 
     # generate chart

pset8/mashup/application.py

@@ -32,8 +32,7 @@ def index():
 @app.route("/articles")
 def articles():
     """Look up articles for geo."""
-
-    # TODO
+    # simple just read and understand the given code and API
     geo = request.args.get("geo")
     if not geo:
         raise RuntimeError("missing geo")
@@ -44,7 +43,10 @@ def articles():
 @app.route("/search")
 def search():
     """Search for places that match query."""
+    # simple remember error checking
     q=request.args.get("q")
+    if not q:
+        raise RuntimeError("missing query")
     rows=db.execute("SELECT * FROM places WHERE (postal_code LIKE :id) OR (place_name LIKE :id) OR (admin_name1 LIKE :id)", id=q+'%')
     return jsonify(rows)
 

pset8/mashup/static/scripts.js

@@ -72,21 +72,27 @@ function addMarker(place)
         title: place.place_name
     });
 
+    // read the code...and understand ..get hints from configure and show info
     marker.addListener('click', function() {
         $.getJSON(Flask.url_for("articles"), {geo: place.postal_code})
         .done(function(data, textStatus, jqXHR) {
             var content='<ul>';
+            // error checking not done..because...some news will be there!!!...
             for (var i = 0; i < data.length; i++){
                 content += '<li>';
                 content += "<a href="+data[i].link+">"+data[i].title+"</a>";
                 content += '</li>'
             }
             content += '</ul'
+            // show the content
             showInfo(marker, content)
         });    
     });
 
+    // add to the markers list
     markers.push(marker)
+    
+    // show the maker
     marker.setMap(map)
 }