rst

61 ms·

631.
by rst 12y ago
The App Store review guidelines present a large number of specific rules, but before that, they say right up front that "This is a living document, and new Apps ... may result in new rules at any time. Perhaps your App will trigger th
632.
by rst 12y ago
Beyond P=NP: this actually gives you a constant-time solution for any problem where it's possible to enumerate candidate solutions, regardless of how long it takes to do so. So, we'd have ANYTHING=O(1).
633.
by rst 12y ago
Awkward time to bring up iCloud as a potential SPOF for users' security. Apart from technical flaws in the service (and any cloud service is likely to have one eventually), cryptographer Matt Green (on his twitter feed) has pointed o
634.
by rst 12y ago
Remember the Google/Oracle lawsuits over the use of Java technology in Android? Bringing in JVM changes from newer Java releases risks giving Oracle grounds for another lawsuit (covering the patents and whatever copyrights may apply t
635.
by rst 12y ago
The arc processor line from Synopsys does this commercially, I believe. Risc-v seems to be trying to support this sort of thing; there is reserved opcode space for implementation specific extensions
636.
by rst 12y ago
This may be easier in C# than in Dart because in C#, you have type declarations for all the members. In Dart, type declarations are optional. (And, IIRC, not supposed to change the behavior of the program, except for type-checks performed
637.
by rst 12y ago
And you're thinking about a workflow in which no one ever uses "git push". If most devs do, and "the XML guy" can't (because someone else needs to look over his commits), that's a headache, which could be
638.
by rst 12y ago
He's saying that "pulling a portion of the repo" is one of his use cases , and not being able to do that gets in his way . Pointing out technical reasons why git doesn't do the job he wants doesn't make it useful
639.
by rst 12y ago
Perhaps the issue is that there's no technical barrier to them messing around with something else, perhaps by accident. (And if you try to deal with this by playing around with filesystem-level write positions in the repo, then they c
640.
by rst 12y ago
Satellites of the size they're proposing to launch (120 kg range) are typically secondary payloads on a launch of a larger satellite; it's the primary payload that gets to select the launch timing and orbit, and the secondary just
641.
by rst 12y ago
Not necessarily -- if a net-neutral infrastructure as a whole is profitable to operate, then it can be constructed and operated by profit-making businesses without subsidies. But in that case, you need regulation if you want to keep net
642.
by rst 12y ago
Grasshopper and F9R-1 (their newer test vehicle) are widely believed to fly with extra mass as ballast in order to make them easier to control -- most likely just as extra fuel in the tanks which they don't plan to burn on that flight.
643.
by rst 12y ago
It doesn't actually hover over the water. For that, the rocket's thrust would have to exactly balance the weight of the first stage, with the tanks nearly empty, and even a single Merlin engine can't actually throttle down t
644.
by rst 12y ago
A lot of that time went into the development of not the code per se, but algorithms that newer code could reimplement. Perhaps in simpler forms on newer machines. Conventional TeX has a hard time optimizing placement of page breaks because
645.
by rst 12y ago
Not in the Android performance picture so far: language runtimes (e.g., jruby and groovy) that dynamically generate bytecode. A JIT can optimize it (and for jruby and grovvy on the jvm, it typically does). That hasn't been an issue o
646.
by rst 12y ago
Developer-supplied descriptions don't help: If you're worried that an app might use its permissions inappropriately, you should also be worried that the developer will leave inappropriate uses out of whatever explanation they sup
647.
by rst 12y ago
Last I checked, most colleges were private institutions, and the public ones (state schools and community colleges) tended, in general, to be a lot more frugal (and cheaper, and more cost-effective) than private ones.
648.
by rst 12y ago
His claim is that stealth only works against radars in a particular frequency band, and that long-wave radars designed to defeat it can do so easily. Saddam Hussein didn't have those; the point is that the F-35's adversaries (any
649.
by rst 12y ago
You think the US won't buy them? Our military bought and paid for hundreds of F-111s, the last plane we designed to do everything for everyone, with the result that it wasn't useful anyplace. (Yes, we've tried this trick be
650.
by rst 12y ago
FWIW, even newer parts of the NYC system aren't getting bypass capability -- the initial portion of the second avenue subway will be double-tracked when it opens in a few years; they even cut out a planned storage track (which could at
651.
by rst 12y ago
The attack scenario is that the man-in-the-middle alters the checksums in the page to match the checksums of his backdoored version.
652.
by rst 12y ago
You appear to be right about P&W. About the engines: heck, the Space Shuttle Main Engine was staged-combustion Oxygen-Hydrogen. The question isn't whether the US could produce such an engine. It's how soon, and how reliably
653.
by rst 12y ago
Among kerosene/oxygen rockets, the RD-180 gets an unusually high amount of propulsive kinetic energy per unit of fuel (technically, high specfic impulse), in part due to a more efficient combustion cycle (staged combustion), and in par
654.
by rst 12y ago
Rocket engines is what they're buying in this instance (or rather, what ULA has been prevented from buying by the injunction): specifically, RD-180 engines, built by the Russian firm NPO Energomash for use on the first stage of United
655.
by rst 12y ago
And Russia, of course; American astronauts have been going up on Soyuz since the end of the Shuttle program. If you're suggesting that the US could go to China for replacement transportation services: not likely. NASA is currently ba
656.
by rst 12y ago
Different Russian engines. The engines that ULA is banned from buying are RD-180s; they are being newly built to, effectively, American specifications, though most components are derived from the RD-170 which was originally built for Energ
657.
by rst 12y ago
This is mixing up multiple things: the injunction concerns engines for launches of American defense satellites (GPS, spy sats, communications satellites), etc., which don't go to the space station and don't have much to do with i
658.
by rst 13y ago
If you have ssh access to their machines, you can just set up their repo as a new remote. If not, "git bundle" supports coordination via email, which is the workflow that git was originally designed to support.
659.
by rst 13y ago
These requirements seem to apply mostly to "national security" payloads (e.g., spysats), so the exact nature of the requirements is classified. It's easy to come up with a plausible guess about what the requirements might be
660.
by rst 13y ago
They can't assume the test will work. (The first attempt, at the Cassiope launch, didn't.) Crashes at sea are a lot less consequential than crashes on land. (Flight paths are not an issue; they eventually expect to recover boost

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