Pae: Why would it not let you?

Sambrook: Keitsock: Still, e.g. on ios there is nothing like react but if you will just rerender everything, it’s gonna be slow, so you gotta be smart withou your updates. in the ui code

Keitsock: You can define a variable in a higher scope and then you can define another variable with the same name in a lower scope

Wassmann: Sambrook what you mean is he Chinese? lol he’s Russian. and it’s spelled Dostoyevsky

Mulderig: In other languages var x = fx means “ take the x in the outside scope, apply f, and ***ign it to a new local x”

Keitsock: Var x = 0; function foo { var x = 5; console.logx; } foo; x // 0

Pae: Palomer: which other language? i’ve never seen that work that way

Keitsock: In JS scope has nothing to do with runtime p***ing of variables

Keitsock: In js fx means take the value of x, p*** it as a new variable in the arguments list for f

Cronce: Sambrook ahh I meant to say Dostoevsky* lol

Buboltz: Keitsock: omg, why doesn’t it output the local x?

Sambrook: AramKaram: The name has only a correct spelling in russian though. everything else is just an approximation and there is not one way

Keitsock: Palomer: sorry it would output 5, but the x at teh end is still 0

Keitsock: Var x = 0; function foo { var x = 5; console.logx; } foo; console.logx; // 5, 0

Keitsock: When you operate on variable foo, it looks in the current scope for foo. if none is found, it goes up a scope and repeats that process

Joerling: Sambrook might be, can’t argue, don’t know much about it, I was just thinking of Fyodor Dostoevsky and thats how they spell in Russian, but yeah there could be variety of spellings I guess :

Mezzinni: Var x = {expression containing x} —why would it ever make sense to have those 2 x’s refer to the same thing?

Yant: Palomer: because it’s awesome

Keitsock: Palomer: not sure what you mean

Yant: There are languages where you can write “def foo := 1, 2, foo” and have a self-referencing array

Keitsock: Scope is a function thing

Yant: JS isn’t one of them though

Keitsock: And scope happens at declaration time, not runtime

Abigantus: Damn it. I can’t even see how reduce works in this situation. http://jsfiddle.net/3kry3bdm/1/ how does even reduce helps doing this. this is the first time ever my seeing reduce doing anything else other than adding numbers together lol

Wuori: Var x = 1; {var x = x + 1;} // I would think the local x would be 2

Keitsock: Not sure what you are trying to express with those curly braces there palomer

Keitsock: But as I said, the only thing that declares scope in js is a function

Edgett: Var x = 1; function {var x = x+1;}

Cone: Keitsock i think there a couple more now

Yant: Keitsock: for ‘var’ anyway

Sambrook: AramKaram: English tends to be pretty dumb about integrating foreign words though. e.g. for arabic words, in english you always have the “al” which just is an article like “the”. so you have al gebra and al quaeda however you spell that and al cohol. which is saying like “the maths” “the fundament” “the powder”. other languages have a more systematic approach to integrating foreign words, e.g. chinese

Keitsock: Var declaration is hoisted palomer

Schrandt: Sorry, was using c++ syntax

Werkheiser: Hello. How can I efficiently store and look up things by a non-scalar, like a two-dimensional coordinate?

Keitsock: Palomer: you can think of that like var x; x = x + 1;

Werkheiser: Object properties seem to be pretty slow

Keitsock: After var x; x is undefined

Cressell: Does anyone know a tool or have an idea of how to automatically insert missing semicolons? I write semicolon-less code, but my new team requires semicolons and they’re really painful to add for me. Any ideas?

Keitsock: So then x = undefined + 1;