When you expect to get most of your revenue from selling apps in the iStore - it's essential that people are unable to get apps for free via fancy web pages.

Hence, iPhone doesn't support WebGL for doing fancy 3D graphics on a web page - if it did, people would write cool games in HTML/JavaScript/WebGL and monetize them directly without having Apple take 30% of the revenue and "approve" their product.

Is this because Apple can't support WebGL? Hell no! The browser actually DOES contain code for WebGL, but it's disabled...UNLESS your web site signs up to display Apple-provided advertising banners...in which case, WebGL works great!

Safari uses the exact same core rending software ("WebKit") as Chrome - so it can trivially support everything that Chrome supports - it's really just a matter of Apple deciding to deliberately cripple the browser to prevent people from providing apps for free.

The "double-tap" bombings, where they wait and bomb the rescuers, are surely clear breaches of the laws of war. Those rendering humanitarian aid onto others - even fighters if hors de combat - are meant to be protected.

It's an incredibly evil policy.

See e.g. the "collateral damage" wikileaks Iraq video - watch it past the initial strike on the photographers. They wait and then shoot up a van that stops, a random passerby who stopped to give assistance - a good samaritan - and they were *executed* for it. Their children were also visible in the front of the van and (at a minimum) very badly injured by the AH64 heavy cannon fire.

Evil, EVIL, **EVIL**.

And did Obama do, he approved this tactic for use in Afghanistan with drone strikes.

What happens to your 'standard' linked lists solution when you have ten values scattered over an array which is 1000! (factorial 1000) in each dimension? For most genuinely sparse arrays, a hashmap is a better approximation of an efficient implementation. Of course, there will be corner cases where you want to do something different, but linked lists strike me as an extremely poor solution except in arrays where more than about 10% of cells have data.

I should have read the linked questions before replying...

Stupid, stupid, STUPID! Why have numRows and numCols in a sparse array? Things with unnecessary, arbitrary bounds annoy me. My implementation of Conway's Game of Life runs on a sparse array precisely because that allows the world to stretch arbitrarily in any direction a glider goes, limited only by the capacity of the bignum library and the total store available to the program.

And this is how we teach computer science?

Sigh.

Sparse array entries, in general, are not necessarily immutable, although they may be so in this case. Most spreadsheets are implemented as sparse arrays, for example. But your point about the benefit of a map is well made.

just a question.... is North & South game already banned because of this stupidity?

bad autocomplete!

If Netflix really wanted to be nasty they could just sprew streams of garage in the other direction and toss it as soon it hits their network.

If the last mile ISPs are going to only allow balanced traffic for free (and last mile traffic is clearly not balanced by its nature) then we should fix the problem for them and generate enough upstream traffic to balance the equation. This is simple - answer one idiotic position with another idiotic position. Have Netflix go peer to peer and then manage traffic flow to create balanced traffic at all of the last mile ISPs. It's what they want ---- we should give it to them.

In Poland playing poker tournament without valid license is illegal. Online poker is also illegal. I am not joking. People here are so brainwashed by Civic Platform that they still consider this party "liberal".

I have two Facebook accounts, a real one with with my real info and another one I just use for playing games. I don't want to mix 'friends' from casual games in with my real friends. I used a pseudonym on the second account. Facebook just locked my second account this week and wouldn't release it until I sent in a photo of my driver's license. I consider that a huge invasion of privacy. I had be using the second account for a long time under the pseudonym. After receiving my driver's license they changed the name on the account to my real name (now no one in the games knows who I am) and they entered all of the data from driver's license into the profile. This is just a total mess which is going to cause me to use Facebook even less than I do now.

No, just NO.

Getting inf or -inf out of floating point actually makes sense: It is not just exactly zero but a whole range of very small numbers which give similar results and are treated as 'limits as x approaches 0'.

Integer numbers and arithmetic are exact and although INT_MAX might be large these days it is still not anywhere near infinity and just does not make any sense at all.
And having signed and unsigned behave differently also does not make any sense at all.
Your compile time option might as well be named '-foutput-random-instructions'

Whenever you divide by zero, the problem ISN'T the division - it's the previous code that either assumes that dividing by this number will produce a valid result, or is doing something wrong in turn.

Checking - and somehow kludging - a divide by zero does nobody any good. You have to ask WHY you're dividing by zero and what it should mean.

I *want* divide by zero errors because they inform me that I'm doing something wrong elsewhere.

(And even if you wanted to kludge it - returning a very large number would be a better choice than zero...but don't do that).

Bottom line - if you're doing lots of div0 tests then you're doing something wrong in many other places!

    -- Steve

A lot of people recycle accounts.

HMD's have been around since LONG before there were 3D graphics on the PC at all. They'd been used (for example) on military flight simulator back when you'd need a million dollars of mainframe hardware to generate a 3D image. I very much doubt that any of this tech is actually new. Probably someone like Evans & Sutherland were the first to do it - and they had 3D graphics back in the late 1970's. I doubt that much of the general concept is still patentable - so this argument is probably over some kind of small feature.