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Comment Can this be installed on a dual-boot machine (Score 1) 317 317

Probably going to be told I am a noob, but:

I have a dual-boot machine. It is an Acer machine and has a legitimate Windows 7 license and I installed Linux, keeping Windows 7 in a resized partition, and occasionally boot into it (it has a bug where it will not boot without a usb keyboard plugged in so I don't do it as often as I thought I would as I have to dig out that keyboard and plug it in). Linux is the default boot. I have no "recovery disk" and I may have lost any paperwork that came with the machine but it is a real legal copy.

So the question is: can I replace 7 with 10? Without damaging the Linux install? If it screws up grub how do I get it back?

Comment Re:They're not always like this (Score 1) 363 363

Some lights have separate segments where it's only straight or only left-turn. Pedestrians only have the walk sign during the straight traffic.

True but it is uncommon. It is indicated by a *red* left arrow light. I think that works.

However if there is only a green left arrow light that turns off when opposing traffic starts moving, you are still allowed to turn left, though you have to wait for a gap in the oncoming traffic. For obvious reasons (the driver is looking only at the oncoming traffic) this is when the pedestrians are hit.

Comment Re:Altough I agree (Score 1) 61 61

My favorite feature is Birds Eye view, which uses aerial photos rather than satellite photos. Sometimes that can get you better info from that, since they usually have 4 different perspectives you can rotate through, and they are much closer and more detailed.

That was true, but Google was pretty quick to copy it. They now seem to have incorporated it into their 3D view as well, which makes panning somewhat better (and more importantly hides the worst defects in the 3D view by limiting the projection to a POV very similar to where the texture map image was taken from).

Comment Re:Reference count synchronization across threads (Score 1) 296 296

Actually the reason for the Global Interpreter Lock is because cPython decided that had less overhead than making the reference counters atomic variables (plus you would still need some kind of locking when modifying any object with a reference count greater than one, though this is such a tiny amount of what a typical Python program does that it is probably irrelevant).

I personally have doubts this is true, but the argument is not impossible. I am wondering if their measurements were on older systems, modern ones are better at atomic operations.

Comment Re:Infinity (Score 3, Informative) 1067 1067

Actually IEEE floating point has a signed zero (+0 and -0 are different values) to solve exactly that. If x is positive, x/+0 is +infinity, x/-0 is -infinity. 0/0 (with any type of 0) returns NaN.

However I believe the article was talking about *integer* division by zero, not floating point.

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