string and integer variable operation using Javascript

<!DOCTYPE html>   <html lang=”en”> <head>     <title>Chapter 2, Example 1</title> </head> <body>     <script>         var myFirstVariable;           myFirstVariable = “Hello”;         alert(myFirstVariable);           myFirstVariable = 54321;         alert(myFirstVariable);     </script> </body> </html> Key source : Beginning JavaScript, 5th Edition (wrox)

Adding text to html element using JavaScript

<!DOCTYPE html> <html lang=”en”> <head> <meta charset=”utf-8″ /> <title>Chapter 1, Example 3</title> </head> <body> <code id=”results”></code> <script> document.getElementById(“results”).innerHTML = “Hello World!”; </script> </body> </html> Key source : Beginning JavaScript, 5th Edition (wrox)

settings with color and alert messages using Javascript

<!DOCTYPE html> <html lang=”en”> <head> <meta charset=”utf-8″ /> <title>Chapter 1, Example 2</title> </head> <body bgcolor=”white”> <p>Paragraph 1</p> <script> // script block 1 alert(“First Script Block”); </script> <p>Paragraph 2</p> <script> // script block 2 document.bgColor = “red”; alert(“Second Script Block”); </script> <p>Paragraph 3</p> </body> </html>   Key source : Beginning JavaScript, 5th Edition (wrox)

using the dir() Built-in function in Python programming

>>> import struct >>> dir() # show the names in the module namespace [‘__builtins__’, ‘__doc__’, ‘__name__’, ‘struct’] >>> dir(struct) # show the names in the struct module [‘Struct’, ‘__builtins__’, ‘__doc__’, ‘__file__’, ‘__name__’, ‘__package__’, ‘_clearcache’, ‘calcsize’, ‘error’, ‘pack’, ‘pack_into’, ‘unpack’, ‘unpack_from’] >>> class Shape(object): def __dir__(self): return [‘area’, ‘perimeter’, ‘location’] >>> s = Shape() >>> dir(s) …

Hacking with ANSI C signal Handling

$sudo strace -e trace=signal -p 1 [sudo] password for jeffrin: Process 1 attached kill(4659, SIGTERM) = 0 kill(4659, SIGCONT) = 0 $gcc crtlc1-p1.c $./a.out Hello world Hello world Hello world Hello world Hello world Hello world Hello world Hello world Hello world ^Ci got a signal 2 Hello world Hello world ^C $cat crtlc1-p1.c #include …