javascript help with variables

With some help, I wrote this javascript.

http://pastebin.com/uSSZp0j6

I don't understand how to add more than one variable to a variable, I need for there to be several "keycodes," not just one. Other than that, the script works fine.

Line 10 specifically is what I need help with

Oh god that is some horrible HTML/Javascript.

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>>4
Well done, dipshit (not really)


var keycodes = new Array("apples", "grapes", "oranges")

x = "incorrect"
for (i = 0; i < keycodes.length; i++)
  if (y == keycodes[i])
    x = "correct"

>>6

op here, thanks a lot. I wasn't familiar with how to make variable arrays.

With the array variables, it seems like your method is the only way to make the script work, my "if else" way of doing it doesn't work with the variable arrays. Could somebody explain why? Also, your way of doing it is cryptic to me. I don't understand what "i" does, I need to go read up on it.

thanks again, I really appreciate it.

>>7
he is getting a list of things addressable by index - array:
var keycodes = new Array("apples", "grapes", "oranges")
affecting a temporary variable to hold the text
x = "incorrect"
then cycling thru all elements of the above mentioned array; to do this he makes use of a temporary variable i, of value 0, 1, and so on until the length of the array minus 1.
for (i = 0; i < keycodes.length; i++)
at each iteration of the cycle he tests if the code at that position of the array is the same at the one held by the variable y, and if so, affects x
  if (y == keycodes[i])
    x = "correct"

>>8
+1, Helpful

>>9
+1, le monkey face

checking help with doubles

>>6,8
Please stop programming! new Array? for in 2012? Come on! This is JavaScript, emphasis mine!!!

var keycodes = { "apples":1, "grapes":1, "oranges":1 }
if (y in keycodes)
    x = "correct"
else
    x = "incorrect"

>>12
JavaShit? Stop programming!

>>13
You're just mad I fixed your shitty Java-like code.

>>14
What? It's the first time I post in this thread, no way I'd program in Java or JavaShit

>>15
I get it, you think Java is shit. So do I.
I also don't think Javascript is very good.

>>16
Java is shit, Javascript is shit, you're new shit and should fuck off back to /g/ already

>>17
You're projecting. FrozenVoid drove me away two years ago and I'm back with a vengeance, cretin.

>>18
CURTAIL MY ANUS

>>18
So what brought you back, moot.

　　　　　♪　　☆
　　　♪　　　／ ＼　　　    OPPA
　　　　　　ヽ( ͡° ͜ʖ ͡°)ﾉ 　　GANGNAM STYLE
　　 　 　　　 (　 へ) 　　　
　 　 　 　 　　く 　　　　　　

　　　♪　　　　☆
　　　　　♪　／ ＼　　　 
　　　　　　ヽ( ͡° ͜ʖ ͡°) ﾉ　　OPPA
　　 　 　　　 (へ　 ) 　　　GANGNAM STYLE
　 　 　 　 　　　　 >　　　　

>>20
Procrastination and a newfound sense of masochism.

>>21
Take your Gungan oppai back to /b/, please..

>>22
What are you procrastinating?

>>24
Mostly university stuff. Could you quit with the third-degree, or at laest start using sage?

>>21
You misspelled oppan... twice.

>>26
*Oppai

>>12
Arrays are fine (although new Array is pointless). The in operator is dangerous as it returns true when a property is found anywhere in an object's prototype chain, which is not what you want in this case. It's also no faster than a simple array iteration. [1]

[1] http://jsperf.com/in-vs-array-iteration

>>28
Oh right. I knew about the prototype chain but wanted to keep it simple (i.e. not use hasOwnProperty).
Is that test meant to not feature the in operator at all? All four tests are array iteration.

>>29
Also, it's not always about performance. Readability is clearly the more important factor here. And since you're essentially doing an in test every time you access an object property, it's really not ever going to be the bottleneck.

>>29
You ruined my test case