This presentation will introduce you to programming languages that support different programming paradigms and to give you the knowledge of basic concepts and techniques that will allow them to differentiate between various programming paradigms.
15. Creative Commons Sharealike Attributions Noncommercial Programming Concepts – An Overview Set of Programming Concepts Procedures Functions Higher/1 st Order Evaluation Eager/Lazy Variables Single/Multi store Scope Scope of variables Typing State Internal/External Objects Classes Concurrency & on & on & on.....
16. Creative Commons Sharealike Attributions Noncommercial Programming Concepts – An Overview Subset of Concepts Programming Model Set of Programming Concepts Programming Language(s) Embraced by Followed by
23. Creative Commons Sharealike Attributions Noncommercial Programming Concepts – Eager Evaluation .... List Gen ( int N ) { ArrayList list = new ArrayList(); list. add ( N ); list. addAll ( Gen (N+1) ); return list; } void myMethod () { List K = Gen (1); System.out. println ( "Elements: " + K. getElementAt ( 3 ) ); } ....
24.
25. Creative Commons Sharealike Attributions Noncommercial Programming Concepts – Lazy Evaluation declare fun lazy { Gen N} N | { Gen N+1} end declare K = { Gen 1} { Browse “Elements: ” + Nth K 3}
26.
27. Creative Commons Sharealike Attributions Noncommercial Programming Concepts – Procedures local Default MaxOrDefault in Default=10 proc { MaxOrDefault Arg ?Result} if Arg >= Default then Result = Arg else Result = Default end end local Result in { MaxOrDefault 5 Result} { Browse Result} end end
32. Creative Commons Sharealike Attributions Noncommercial Programming Concepts – External and Internal State fun { Sum Numbers} Result = { NewCell 0} Input = { NewCell Numbers} proc { Sum } case @Input of nil then skip [] X | Y then Result := @Result + X Input := Y { Sum } end end in { Sum } @Result end
33.
34. Creative Commons Sharealike Attributions Noncommercial Programming Concepts – Concurrency fun { GenerateNumbers FromArg ToArg} { Delay 100} if FromArg > ToArg then nil else FromArg | { GenerateNumbers FromArg+1 ToArg} end end thread ConcurrentFlow1 = { GenerateNumbers 1 10} end thread ConcurrentFlow2 = { GenerateNumbers 11 20} end { Browse ConcurrentFlow1} { Browse ConcurrentFlow2}
35. Creative Commons Sharealike Attributions Noncommercial Programming Concepts – Concurrency .... public void main(String[] args) throws InterruptedException { Temp temp = new Temp(); createAConcurrentFlow(1, 10); createAConcurrentFlow(11, 20); } .... private void createAConcurrentFlow( int FromArg, int ToArg) { new Runnable() { public void run() { try { new Temp().GenerateNumbers(FromArg, ToArg); } catch (InterruptedException e) { } } }; } ....
36.
37. Creative Commons Sharealike Attributions Noncommercial Programming Concepts – Static Typing int num, sum; // explicit declaration num = 5; // now use the variables sum = 10; sum = sum + num;
38.
39. Creative Commons Sharealike Attributions Noncommercial Programming Concepts – Dynamic Typing foo() { x = 1; x = 'hello'; }