Javascript: You Like It, It Likes You

Slide 1

Slide 1 text

Javascript You like it, it likes you. Tuesday, 27 September, 11

Slide 2

Slide 2 text

Brief history lesson. (I’m sorry) Tuesday, 27 September, 11

Slide 3

Slide 3 text

Tuesday, 27 September, 11

Slide 4

Slide 4 text

Douglas Crockford Every time you forget a semicolon, he roundhouse kicks your mom in the face. Tuesday, 27 September, 11

Slide 5

Slide 5 text

Tuesday, 27 September, 11

Slide 6

Slide 6 text

Tuesday, 27 September, 11

Slide 7

Slide 7 text

Why use JavaScript? Tuesday, 27 September, 11

Slide 8

Slide 8 text

Tuesday, 27 September, 11

Slide 9

Slide 9 text

Tuesday, 27 September, 11

Slide 10

Slide 10 text

Variables and data types. Tuesday, 27 September, 11

Slide 11

Slide 11 text

Variables and data types. Tuesday, 27 September, 11

Slide 12

Slide 12 text

Variables and data types. wtf is this horseshit FAIL Tuesday, 27 September, 11

Slide 13

Slide 13 text

Variables and data types. wtf is this horseshit FAIL Tuesday, 27 September, 11

Slide 14

Slide 14 text

Tuesday, 27 September, 11

Slide 15

Slide 15 text

Some JavaScript fundamentals. Gotta crawl before you make an omelette. Tuesday, 27 September, 11

Slide 16

Slide 16 text

Some JavaScript fundamentals. This sumbitch is case-sensitive. Tuesday, 27 September, 11

Slide 17

Slide 17 text

Some JavaScript fundamentals. Comments. Comment your code so the next slackjawed gutbucket who’s clearly way dumber than you that has to work with it isn’t TOTALLY boned, plzkthx. Tuesday, 27 September, 11

Slide 18

Slide 18 text

Tuesday, 27 September, 11

Slide 19

Slide 19 text

DON’T FUCKING DO THIS. Tuesday, 27 September, 11

Slide 20

Slide 20 text

DON’T FUCKING DO THIS. p.s.: yeah. i wrote it. shut up. Tuesday, 27 September, 11

Slide 21

Slide 21 text

Arithmetic Operators Tuesday, 27 September, 11

Slide 22

Slide 22 text

Variables and data types. Tuesday, 27 September, 11

Slide 23

Slide 23 text

Variables and data types. Tuesday, 27 September, 11

Slide 24

Slide 24 text

Variables and data types. String theory. Tuesday, 27 September, 11

Slide 25

Slide 25 text

Variables and data types. Hey baby what’s your Number. Tuesday, 27 September, 11

Slide 26

Slide 26 text

Variables and data types. Stupid loose typing. Wait, it gets better. Tuesday, 27 September, 11

Slide 27

Slide 27 text

Variable comparisons. Tuesday, 27 September, 11

Slide 28

Slide 28 text

x = 4; y = “7”; x.toString(); // “4” (string) parseInt(y,10); // 7 (number) Variable comparisons. Tuesday, 27 September, 11

Slide 29

Slide 29 text

y = “why”; parseInt(y,10); // NaN (Not a Number) Variable comparisons. Tuesday, 27 September, 11

Slide 30

Slide 30 text

NaN == NaN; NaN === NaN; // both false. Variable comparisons. This is why Douglas Crockford drinks. Tuesday, 27 September, 11

Slide 31

Slide 31 text

Note that +, besides being used for math, also concatenates strings. ! ! ! ! ! var x = 5 + 3; !! ! ! // 8 - Number ! ! ! ! ! var x = “5” + “3”; !! // “53” - String (PHP got this part right. JavaScript? Meh.) Variable comparisons. This is why Scott Kosman drinks. Tuesday, 27 September, 11

Slide 32

Slide 32 text

Variables and data types. Boolean. That word’s funny enough on it’s own. Tuesday, 27 September, 11

Slide 33

Slide 33 text

Variables and data types. Something about Madonna. (Array of light? See what I did there?) Tuesday, 27 September, 11

Slide 34