CS50 Lecture5
- 1. TCP/IP
- 2. clkr.com
- 10. HTTP
- 11. GET / HTTP/1.1 Host: www.example.com ...
- 12. GET /index.html HTTP/1.1 Host: www.example.com ...
- 13. GET / HTTP/1.1 Host: www.example.com ...
- 14. HTTP/1.1 200 OK Content-Type: text/html ...
- 15. GET / HTTP/1.1 Host: harvard.edu ...
- 16. GET / HTTP/1.1 Host: www.harvard.edu ...
- 17. HTTP/1.1 301 Moved Permanently Location: https://www.harvard.edu/ …
- 18. HTTP/1.1 404 Not Found Content-Type: text/html ...
- 19. GET / HTTP/2 Host: www.example.com ...
- 21. ● 200 OK ● 301 Moved Permanently ● 302 Found ● 304 Not Modified ● 401 Unauthorized ● 403 Forbidden ● 404 Not Found ● 418 I'm a Teapot ● 500 Internal Server Error ● ...
- 22. GET / HTTP/1.1 Host: safetyschool.org ...
- 23. GET / HTTP/1.1 Host: www.harvardsucks.org ...
- 24. GET /search?q=cats HTTP/1.1 Host: www.google.com ...
- 25. HTML
- 26. <!DOCTYPE html> <html lang="en"> <head> <title> hello, title </title> </head> <body> hello, body </body> </html>
- 27. <!DOCTYPE html> <html lang="en"> <head> <title> hello, title </title> </head> <body> hello, body </body> </html>
- 28. <!DOCTYPE html> <html lang="en"> <head> <title> hello, title </title> </head> <body> hello, body </body> </html>
- 29. <!DOCTYPE html> <html lang="en"> <head> <title> hello, title </title> </head> <body> hello, body </body> </html>
- 30. <!DOCTYPE html> <html lang="en"> <head> <title> hello, title </title> </head> <body> hello, body </body> </html>
- 31. <!DOCTYPE html> <html lang="en"> <head> <title> hello, title </title> </head> <body> hello, body </body> </html>
- 32. <!DOCTYPE html> <html lang="en"> <head> <title> hello, title </title> </head> <body> hello, body </body> </html>
- 33. <!DOCTYPE html> <html lang="en"> <head> <title> hello, title </title> </head> <body> hello, body </body> </html>
- 34. <!DOCTYPE html> <html lang="en"> <head> <title> hello, title </title> </head> <body> hello, body </body> </html>
- 35. CSS
- 36. <!DOCTYPE html> <html lang="en"> <head> <title> hello, title </title> </head> <body> hello, body </body> </html>
- 37. <!DOCTYPE html> <html lang="en"> <head> <style> </style> <title> hello, title </title> </head> <body> hello, body </body> </html>
- 38. <!DOCTYPE html> <html lang="en"> <head> <link href="styles.css" rel="stylesheet"> <title> hello, title </title> </head> <body> hello, body </body> </html>
- 39. validator.w3.org
- 40. JavaScript
- 41. C
- 42. JavaScript
- 43. int counter = 0;
- 44. let counter = 0;
- 45. counter = counter + 1;
- 46. counter += 1;
- 47. counter++;
- 48. if (x < y) { }
- 49. if (x < y) { } else { }
- 50. if (x < y) { } else if (x > y) { } else { }
- 51. while (true) { }
- 52. for (int i = 0; i < 50; i++) { }
- 53. for (let i = 0; i < 50; i++) { }
- 54. <!DOCTYPE html> <html lang="en"> <head> <title> hello, title </title> </head> <body> hello, body </body> </html>
- 55. <!DOCTYPE html> <html lang="en"> <head> <title> hello, title </title> </head> <body> hello, body </body> </html> hello, title hello, body
- 56. <!DOCTYPE html> <html lang="en"> <head> <script> </script> <title> hello, title </title> </head> <body> hello, body </body> </html>
- 57. <!DOCTYPE html> <html lang="en"> <head> <script src="scripts.js"></script> <title> hello, title </title> </head> <body> hello, body </body> </html>
- 58. <!DOCTYPE html> <html lang="en"> <head> <title> hello, title </title> </head> <body> hello, body <script> </script> </body> </html>
- 59. <!DOCTYPE html> <html lang="en"> <head> <title> hello, title </title> </head> <body> hello, body <script src="scripts.js"></script> </body> </html>
- 60. ● blur ● change ● click ● drag ● focus ● keypress ● load ● mousedown ● mouseover ● mouseup ● submit ● touchmove ● unload ● ... ●
- 61. This is CS50