** UnhandledExceptionEventHandler :: OFFICIAL LC / CHATTER THREAD ** - Page 1261 - Computer Technical Help

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** UnhandledExceptionEventHandler :: OFFICIAL LC / CHATTER THREAD **

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First

261 761 1061 1161 1211 1241 1251 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1271 1281 1311 1361 1461

Last

01-05-2018 , 03:20 PM

#31501

candybar

Pooh-Bah

Join Date: Aug 2011 Posts: 4,375

Quote:

Originally Posted by Grue

I got a unsolicited job offer (to interview) at Reddit just because of my game

Two months too late oh well.

Wait why is it two months too late? If it's a clear step-up, you should go for it, unless you have some non-work related reason why you can't.

Quote

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01-05-2018 , 03:50 PM

#31502

Grue

Pooh-Bah

Join Date: Mar 2004 Posts: 5,667

I start a new full time job at a fortune 50 in a lead engineer role on Monday.

Quote

01-05-2018 , 04:11 PM

#31503

Victor

Carpal \'Tunnel

Join Date: Jul 2003 Posts: 81,783

Quote:

Originally Posted by blackize5

I personally like let for objects and arrays that will be modified. That way let signifies "this thing changes"

ya this is how I learned. let or const.

Quote

01-05-2018 , 04:24 PM

#31504

candybar

Pooh-Bah

Join Date: Aug 2011 Posts: 4,375

Quote:

Originally Posted by Grue

I start a new full time job at a fortune 50 in a lead engineer role on Monday.

Clearly the timing could have been better but I don't think it's a big deal or anything if you have to leave the new job in a couple of months - just leave it out of your future resume.

Quote

01-05-2018 , 04:28 PM

#31505

daveT

S.A.G.E. Master

Join Date: Jun 2005 Posts: 23,955

Quote:

Originally Posted by Grue

don't use const for objects or arrays unless you're actually reassigning them.

May I ask why you suggest this? I would think that "const" would mean "constant" and therefore an immutable global value.

I consider "let" local to the function, meaning that it is a temporary, immutable value within a function that is destroyed once it is used, then reinitialized in a function when the function is called again, and would never be global.

"Var" seems to be well, a variable, which ought to be modified either within the function or the global space.

Is there any intrinsic difference between these keywords in JS outside of aliases for var to show intent?

Quote

01-05-2018 , 04:37 PM

#31506

Grue

Pooh-Bah

Join Date: Mar 2004 Posts: 5,667

Its just the way JS decided to add const and let. If you try to reassign a const variable JS will throw an error. It has no problem with adding a property to an object or pushing a value into an array made with const. Therefore people just use const for those. shrug?

Quote

01-07-2018 , 03:27 PM

#31507

Craggoo

banned

Join Date: Sep 2006 Posts: 12,645

If you really want to make an object immutable you can do the following

Code:

Object.freeze(myObject)

If you try to modify it after that, you will receive an error

Quote

01-07-2018 , 03:29 PM

#31508

PJo336

THRILLHOUSE!

Join Date: Mar 2007 Posts: 22,158

Quote:

Originally Posted by Craggoo

If you really want to make an object immutable you can do the following

Code:

Object.freeze(myObject)

If you try to modify it after that, you will receive an error

Doesnt help on nested objects. There is no good immutable solution in native js yet

Also, do you receive an error? I dont in the console, it just doesnt update it

Quote

01-07-2018 , 05:24 PM

#31509

OmgGlutten!

Pooh-Bah

Join Date: Aug 2016 Posts: 5,273

They cold called you just from the game?

Quote

01-07-2018 , 05:50 PM

#31510

Grue

Pooh-Bah

Join Date: Mar 2004 Posts: 5,667

I guess? On reread it looks like they expected me to want to move to SFO? uh no. Who said side projects are useless huh. Though I guess its not easy to make something that gets as much traffic as this thing. Not that I did anything of any talent, I just used an permissive license game and its art. Meh.

Quote

01-07-2018 , 07:13 PM

#31511

Larry Legend

Celtic Pride

Join Date: Jul 2009 Posts: 42,243

Quote:

Originally Posted by PJo336

There is no good immutable solution in native js yet

My understanding is no, and is why stuff like typescript became popular.

Quote

01-08-2018 , 12:36 AM

#31512

daveT

S.A.G.E. Master

Join Date: Jun 2005 Posts: 23,955

I thought the whole point of objects was to be mutable. Why would you want an immutable object?

Quote

01-08-2018 , 12:49 AM

#31513

Larry Legend

Celtic Pride

Join Date: Jul 2009 Posts: 42,243

Immutable objects from what I've learned basically means they are immutable in transfer, and once they arrive, you make a copy of it, versus making changes to it directly, to avoid a lot of bad-data related errors.

Quote

01-08-2018 , 01:04 AM

#31514

jmakin

banned

Join Date: Jan 2008 Posts: 27,798

Quote:

Originally Posted by Larry Legend

isn't that the basic concept of why you pass objects as const in C++? this sounds right but I'm a donk.

edit: nevermind, i'm an idiot that's not why. been programming too much java in the last year

Quote

01-08-2018 , 01:06 AM

#31515

jmakin

banned

Join Date: Jan 2008 Posts: 27,798

my schedule this quarter is:

embedded systems with a 2 unit lab
computational geometry
networking

sounds like a nightmare, i googled computational geometry and still dont really know what it is

i guess this is what happens when your very expensive school only offers like 8 classes per quarter and you've taken most of them because you're at the end of your major

Quote

01-08-2018 , 06:35 AM

#31516

adios

Carpal \'Tunnel

Join Date: Sep 2002 Posts: 22,558

Quote:

Originally Posted by jmakin

isn't that the basic concept of why you pass objects as const in C++? this sounds right but I'm a donk.

edit: nevermind, i'm an idiot that's not why. been programming too much java in the last year

The idea of immutability comes up more in const object methods in C++.

Quote

01-08-2018 , 11:33 AM

#31517

RustyBrooks

Carpal \'Tunnel

Join Date: Feb 2006 Posts: 24,646

My graduate work was mostly in computational geometry and graph theory. One of my favorite fields.

Quote

01-08-2018 , 12:16 PM

#31518

suzzer99

Save the Cheerleader, Save the World

Join Date: Nov 2005 Posts: 101,163

FWIW I can't think of too many places I would need or want an object to be immutable. But maybe it's just the way I program.

Case in point - all express middlware has this method signature: function myMiddleWare(req, res, next)

You'd think the express req and res maybe should be immutable? But the way you pass stuff from middleware to middleware (to avoid effing up the method signature) is by tacking things on to res.locals. Also my framework tacks stuff on to req object. But it could use res.locals if req was immutable.

Personally I like the flexibility.

Quote

01-08-2018 , 07:33 PM

#31519

river_tilt

veteran

Join Date: Apr 2006 Posts: 2,155

I played a bit with Grobner bases a few years ago (part of computational algebraic geometry.) They are quite powerful. I ended writing some C to solve a particular example that interested me, although it failed to find a solution after a few days running.

Last edited by river_tilt; 01-08-2018 at 07:57 PM. Reason: Splelpibg

Quote

01-08-2018 , 08:26 PM

#31520

lostmypw

centurion

Join Date: Mar 2017 Posts: 103

Quote:

Originally Posted by daveT

I thought the whole point of objects was to be mutable. Why would you want an immutable object?

Maybe you're honing in on a specific meaning of the word "object" in which case I get what you're saying, but for anyone interested, https://en.wikipedia.org/wiki/Persistent_data_structure

In redux in js (which I think is similar paradigm as om in clojure and CQRS) your entire app's state is supposed to be immutable. This allows you to do stuff like 'undo' functionality trivially and helps debugging because you can see exactly what your update functions are changing in your state.

Quote

01-08-2018 , 08:37 PM

#31521

lostmypw

centurion

Join Date: Mar 2017 Posts: 103

Quote:

Originally Posted by daveT

"Var" seems to be well, a variable, which ought to be modified either within the function or the global space.

Is there any intrinsic difference between these keywords in JS outside of aliases for var to show intent?

yes, let and const actually have traditional block scope while var has function scope.

Code:

{ let x = 5}
x //undefined
{ var x = 2 }
x === 2 //true

Quote

01-08-2018 , 10:29 PM

#31522

muttiah

Carpal \'Tunnel

Join Date: Aug 2004 Posts: 25,375

Quote:

Originally Posted by daveT

I thought the whole point of objects was to be mutable. Why would you want an immutable object?

Wait, wat? Doing anything in multithreaded environment is much simpler with immutable objects.

Quote

01-08-2018 , 11:08 PM

#31523

PJo336

THRILLHOUSE!

Join Date: Mar 2007 Posts: 22,158

Quote:

Originally Posted by suzzer99

Spoken like a guy who has never had to deal with threads

Quote

01-08-2018 , 11:36 PM

#31524

gaming_mouse

Carpal \'Tunnel

Join Date: Oct 2004 Posts: 13,786

Quote:

Originally Posted by suzzer99

I think the opposite: it's hard to find legitimate places where objects should be mutable. Performance, which is rarely an issue, is one.

Theoretically, express (and koa) absolutely should have been designed with immutable response objects. A middleware would then modify and return a copy. This, it turns out, probably is a place where performance needs conflict with the correct design. Unless (maybe) you were using something like Immutable.js to implement it.