cali-programming

CS student from California.  Post will be about stuff I learned about programming, as well as other stuff.

[hrefnatheravenqueen]

Hey there US friends! If you’re voting using these machines (Hart eSlate) or similar ones right now or in the near future, make sure that the machine has NOT changed your ballot before casting it, ‘k? It’s apparently an already known problem, and has been for years, but has never been fixed.

Additional Source: https://abc13.com/politics/straight-party-voters-reporting-their-votes-were-changed/4556377/

[cali-programming]

in my computer network class

Guy in my class: For the midterm, can we get a study guide?

Professor: Yes, the study guide is everything we have covered so far. Just study everything and do all the exercises at the end of the chapters.

[freefrontend-blog]

HTML5 Before & After Comparison Slider

http://freefrontend.com/css-sliders/

[cali-programming]

Operators

Assignments: =

Equality: ==

Strict equality: ===

Arithmetic

+

-

*

/

Operator precedence: PEMDAS

Shorthand operators:

+=

-=

*=

/= e.g. total = total + 10 is the same as total += 10

increment

a = a + 1

a += 1

a++

decrement

a = a - 1

a -= 1

a--

[freefrontend-blog]

Pokemon Slider

http://freefrontend.com/css-sliders/

[cali-programming]

strong-type, weak-type language

strong-typed language: each variable must be one particular type

weak-typed language: there's only a generic variable ---- e.g. JavaScript

[cali-programming]

Compiled vs. Interpreted Languages

Compiled Language

source code goes through a compiler and a file is created that contains the machine code

end result is known as an executable

advantages:

once it's compiled, it is ready to run

it can be optimized for a CPU, so it can actually be faster

source code doesn't get shared, just an executable

disadvantages:

if code is compiled on a PC, it will not work on a Mac

of ten needs to be compiled separately for different kinds of CPU even on the same platform

Interpreted Language

programming language for which most of its implementations execute instructions directly, without previously compiling a program into machine-language instructions1

Benefits:

You don't care what machine the other person is using because you just send the source code

Can be more portable and flexible across platforms

Easier when testing because you just write your source code & then run it, letting the interpreter take care of converting it

Easier to debug because you have all the source code

Disadvantages

Everyone that needs to run it needs to have a compiler for that language

Can be slower because you have to interpret it everytime the program is run

Your source code is public

1 https://en.wikipedia.org/wiki/Interpreted_language

[cali-programming]

Doctype Declaration

DOCTYPE declaration tells the browser or useragent which version of HTML that you'll be using. It knows which version of the syntax to use in parsing.

In reality, its triggering something called quirks mode, which ensures that your page is going to be rendered properly.

You want to have DOCTYPE that reflects the version of HTML that you'll be writing.

List of recommended doctype declarations that you can use in your Web documents

[cali-programming]

Structure of Simple HTML Doc

[cali-programming]

HTML, CSS, JavaScript

HTML is a markup language, which means that HTML is used to mark up content in order to explain what that content is and how it relates to other content on that page.

CSS is a style sheet describing how HTML elements are to be displayed on the page.

Javascript is a scripting programming language used in web pages.

HTML - essential for website structure

CSS - page design

JavaScript - page behavior