Talks about different programming paradigms, their strengths & weakness, evolution of programming paradigms and some real life application of how companies have gained competitive advantage by using right paradigm to solve their problems.

1. Programming Paradigms
Bhavin Kamani

2. Cuisine

3. Music Genre

5. Imperative Programming
Instructional
Command
Variable State
Conditions
Loops

6. Direct
Efficient
Inflexible
Side Effects

7. Assembly, C
COBOL, Visual Basic

8. Object Oriented
Programming

10. Abstraction
Maintainibility
Learning Curve
Over Engineering

11. C++, Java, C#
Ruby, Python

12. Declarative Programming
"What" instead of "How"
Reduced Side effects
Order of statements not crucial

13. Domain Specific Languages
SQL

14. Domain Specific Languages
Regular Expression

15. Functional Programming

16. Composability
Concurrency
Learning Curve
Main stream support

17. LISP, Haskell, Erlang
Closure, Scala, F#

18. Multi-Paradigm Programming

19. http://www.99-bottles-of-beer.net
JavaScript

20. Lyrics
99 bottles of beer on the wall, 99 bottles of beer.
Take one down and pass it around, 98 bottles of beer on the wall.
98 bottles of beer on the wall, 98 bottles of beer.
Take one down and pass it around, 97 bottles of beer on the wall.
97 bottles of beer on the wall, 97 bottles of beer.
Take one down and pass it around, 96 bottles of beer on the wall.
--------------------------------------------------------------------------
--------------------------------------------------------------------------
1 bottle of beer on the wall, 1 bottle of beer.
Take one down and pass it around, no more bottles of beer on the wall.
No more bottles of beer on the wall, no more bottles of beer.
Go to the store and buy some more, 99 bottles of beer on the wall.

21. Imperative Style
var lyrics = [];
for (var bottles = 99; bottles > 0; bottles--) {
lyrics.push(bottles + " bottles of beer on the wall, "
+ bottles + " bottles of beer");
var next_bottles = ((bottles-1) == 0 ? "no more" : (bottles-1));
lyrics.push("Take one down and pass it around, "
+ next_bottles + " bottles of beer on the wall.");
}
var zero_bottle = "No more";
lyrics.push(zero_bottle + " bottles of beer on the wall, "
+ zero_bottle + " bottles of beer");
lyrics.push("Go to the store and buy some more, "
+ "99 bottles of beer on the wall.");
document.writeln(lyrics.join("<BR>"));

22. Object-Oriented Style
varBottleSong=function(num_bottles,stanza){
this.num_bottles=num_bottles;
this.stanza=stanza;
};
BottleSong.prototype={
sing:function(separator){
varbeer_form="bottlesofbeer";
for(varbottles=this.num_bottles;bottles>0;bottles--){
this.stanza.addLine(bottles+beer_form+"onthewall,"+bottles+beer_form);
varnext_bottles=((bottles-1)==0?"nomore":(bottles-1));
this.stanza.addLine("Takeonedownandpassitaround,"+next_bottles+beer_form+"onthewall.");
}
varzero_bottle="Nomore";
this.stanza.addLine(zero_bottle+beer_form+"onthewall,"+zero_bottle+beer_form);
this.stanza.addLine("Gotothestoreandbuysomemore,"+this.num_bottles+beer_form+"onthewall.");
returnthis.stanza.write(separator);
}
}
varStanza=function(){
this.lines=[];
};
Stanza.prototype={
addLine:function(line){
this.lines.push(line);
},
write:function(separator){
returnthis.lines.join(separator);
}
}
varsong=newBottleSong(99,newStanza());
document.writeln(song.sing("<BR>"));

23. Functional Style
var BottleSong = function(num_bottles){
var bottles = function(n){
return (n == 0 ? "no more" : n) + " bottles";
}
this.num_bottles = num_bottles;
this.last_stanza = function(){
return ["No more bottles of beer on the wall, no more bottles of beer.",
"Go to the store and buy some more, 99 bottles of beer on the wall."];
}
this.stanza = function(n) {
var line = [bottles(n) + " of beer on the wall, " + bottles(n) + " of beer."];
line.push("Take one down and pass it around, " + bottles(n-1) + " of beer on the wall.");
return line;
}
}
BottleSong.prototype = {
sing: function(separator){
var bottles = _.range(this.num_bottles,0,-1)
var that = this;
return _.reduce(bottles, function(lyrics, n) {
return lyrics.concat(that.verse_n(n));
},[]).concat(that.verse_0()).join(separator);
}
}
var song = new BottleSong(99);
document.writeln(song.sing("<BR>"));

24. bottles 0 = "no more bottles"
bottles 1 = "1 bottle"
bottles n = show n ++ " bottles"
verse 0 = "No more bottles of beer on the wall, no more bottles of beer.n"
++ "Go to the store and buy some more, 99 bottles of beer on the wall."
verse n = bottles n ++ " of beer on the wall, " ++ bottles n ++ " of beer.n"
++ "Take one down and pass it around, " ++ bottles (n-1)
++ " of beer on the wall.n"
main = mapM (putStrLn . verse) [99,98..0]
Haskel Solution

25. (defn bottles-str [n]
(str
(cond
(= 0 n) "no more bottles"
(= 1 n) "1 bottle"
:else (format "%d bottles" n))
" of beer"))
(defn print-bottle [n]
(println (format "%s on the wall, %s." (bottles-str n) (bottles-str n)))
(println "Take one down and pass it around," (bottles-str (dec n)) "on the wall."))
(defn sing [n]
(dorun (map print-bottle (reverse (range 1 (inc n)))))
(println "No more bottles of beer on the wall, no more bottles of beer.")
(println "Go to the store and buy some more," (bottles-str n) "on the wall."))
(sing 99)
Clojure Solution

26. Piet Solution

27. Whitespace Solution

28. Paradigm Evolution

31. Java 8
Lambda Expression