Overview of Programming Languages

Presented at Hackbright Academy

Transcript

1. Overview of Programming Languages Philip I. Thomas Engineer, OpenDNS www.philipithomas.com @philipithomas
2. Me • Philip I. Thomas • Engineer, OpenDNS • www.philipithomas.com • pthomas@opendns.com • @philipithomas
3. About OpenDNS • Recursive DNS (50 billion queries a day) • Security Research and enforcement • 200 employees 208.67.220.220 208.67.222.222
4. Goal Expose new programmers to different programming languages
5. Agenda 1. What’s a Programming Language 2. Language Tour a. Ruby b. PHP c. Java d. C 3. Next Steps
6. What’s a Programming Language
7. Programming Languages • Formal way to communicate instructions to a machine • Standard is “Turing Completeness” • Each language has its own strengths, weaknesses, and idiosyncrasies
8. Turing Completeness Complete: • Ruby • Javascript Incomplete: • HTML • CSS
9. Some Differences • Syntax • Interpreted vs. Compiled • Typing • Paradigms
10. Syntax Source: LearnXinYminutes.com
11. Interpreted vs. Compiled
12. Typing Strong vs. Weak 10 + “10” • Ruby: Error • Javascript: “1010” • PHP: 20 Dynamic vs. Static i = “hello” Do we have to explicitly specify that “i” is a string?
13. Paradigms • Machine Code • Procedural • Object-Oriented “Higher Level”
14. Language Tour
15. Section Languages: • Ruby • PHP • Java • C Covering: • Basics • Where it’s used • Culture
16. Ruby (1995) • Interpreted • Object-Oriented • Strong-typed, Dynamic • Everything is a class! • Emphasizes humans over computers http://learnxinyminutes.com/docs/ruby/
17. Who Uses Ruby
18. Ruby Culture
19. PHP (1995) • Interpreted • General Purpose / Object- Oriented • Weak-Typed and Dynamic • There’s a function for everything http://learnxinyminutes.com/docs/php/
20. Who Uses PHP
21. PHP Culture
22. Java (1995) • Compiled • Strong-Typed and Static • “Write Once, Run Anywhere” • Robust, Secure, Concurrent • Most-used language in the world http://learnxinyminutes.com/docs/java/
23. Who Uses Java
24. Java Culture
25. C (1972) • Compiled • Strong-Typed and Static • Procedural (low-level) • Manual memory management • Second most-used language http://learnxinyminutes.com/docs/c/
26. Who Uses C
27. C Culture
28. Next Steps
29. Programming Advice • Learn to Learn • Ask Questions • Build projects • Don’t be intimidated
30. A word on imposter syndrome • There’s a lot you can know • You only need a subset to build something that people love • It helps to understand what’s out there - curiosity is good; being intimidated is bad
31. Further Reading • LearnXInYMinutes.com • 7 Languages in 7 Weeks • Stack Overflow
32. Conclusion
33. Goal Expose new programmers to different programming languages
34. Agenda 1. What’s a Programming Language 2. Language Tour a. Ruby b. PHP c. Java d. C 3. Next Steps
35. OpenLate Meetup • Tech Talks and Evening Hack Lounge • Every other Tuesday, 7PM-Midnight • Meetup.com/OpenLate
36. Overview of Programming Languages Philip I. Thomas Engineer, OpenDNS www.philipithomas.com @philipithomas