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Comments

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David Cameron Says Brits Should Be Taught Imperial Measures

jeremyp Re:FP? (828 comments)

When I'm driving in France, I switch my sat-nav to metric and I'm done. I have no problem switching between the two measurement systems at all. If you think you'd have a problem, I guarantee you are wrong. At the worst case, it'll take you a few weeks.

yesterday
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David Cameron Says Brits Should Be Taught Imperial Measures

jeremyp Re:FP? (828 comments)

British cars have the speedometer marked in mph and km/h. It would be a few weeks and then everything would be back to normal.

yesterday
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David Cameron Says Brits Should Be Taught Imperial Measures

jeremyp Re:FP? (828 comments)

My French teacher (who was English) reckoned that everybody should use a comma (like the French) for the decimal separator because it was actually the only important piece of punctuation in numbers and therefore should be more obvious than just a dot.

yesterday
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Google To Require As Many As 20 of Its Apps Preinstalled On Android Devices

jeremyp Re:good (421 comments)

Well Kitkat is apparently making good inroads as it went from 13.6% in June to 24.5% [android.com] in early September

iOS 8 was at 46 percent after four days. Obviously, since Apple control all the hardware, it's much easier for them to get people to upgrade, but it's still a big problem for the Android ecosystem. Presumably, app developers are having to support fairly ancient versions of the operating system in order to reach a sizeable proportion of the market, whereas an iOS developer can reach 95% of the installed base with an iOS7+ app.

2 days ago
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Building Apps In Swift With Storyboards

jeremyp Re:I WANT (69 comments)

This is Swift. You just need a file called main.swift with this in it:

CreateGameThatIsSortOfLikeAngryBirdsAndMakeMeMillionsOfDollarsOvernight()

See... Swift is so good it's reduced your code size by 80% (including the missing line to return 0).

2 days ago
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Building Apps In Swift With Storyboards

jeremyp Re:Swift is MIA in TFA (69 comments)

It's actually the second article in a series. The first article looks like it had some Swift in it.

No doubt there will be a new Slashdot story for each subsequent article. Because Swift.

Development novices who were hoping that Apple had created a way to build complex apps with a limited amount of actual coding might have to spend a bit more time learning the basics before embarking on the big project of their dreams.

Is anybody at all surprised except, maybe, said novices?

2 days ago
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Apple Yet To Push Patch For "Shellshock" Bug

jeremyp Re:Bash a bad fit for osx (208 comments)

OS X comes with csh, bash, ksh and zsh. If you delete the link from sh to bash and replace it with a hard link to zsh, it probably secures your Mac.

2 days ago
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Apple Yet To Push Patch For "Shellshock" Bug

jeremyp Re:~/.cshrc (208 comments)

You're probably not running a bash that isn't vulnerable. Neither of the first two patches completely fixed the issue. Personally, I don't think it'll be completely fixed until somebody patches bash to not interpret any of its environment variables as functions.

Which it should never have done in the first place.

2 days ago
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Mobile Phone Use Soon To Be Allowed On European Flights

jeremyp Re: Restrictions (96 comments)

So, my normal speaking voice then.

2 days ago
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Why the Z-80's Data Pins Are Scrambled

jeremyp Re:C=128 (165 comments)

In later models, i.e. well after the 6502 was obsolete for general purpose computers, there was an 8 register that you could set to change which page was regarded as zero page. If that had been available from the start, it would have saved me a lot of time looking for locations that didn't zap the MS Basic interpreter on our Commodore PET. I seem to remember that the floating point accumulators were considered the best bet.

3 days ago
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Why the Z-80's Data Pins Are Scrambled

jeremyp Re:6502 to Z80 work per clock ratio (165 comments)

The 6502 had special addressing modes for accessing the bottom 256 bytes of memory. Addresses in both the 6502 and Z80 were 16 bit, thus taking two read cycles to get a whole address into the CPU so that you could then get the content at the address. However, with the 6502, "zero page" addresses could be read in one read cycle. Not only that, but pairs of zero page locations could be used for indirect addressing. They could be treated as a set of (slow) address registers.

When I first came actress the Z80 after having programmed the 6502 for a while (as a hobbyist), I was quite shocked at how all over the place its design appeared to be and I actually found it a little harder to program at first because there was more to learn in order to use the CPU effectively.

3 days ago
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Remote Exploit Vulnerability Found In Bash

jeremyp Re:Seems fundamentally broken (399 comments)

Exactly. This whole feature is ill conceived madness. For one thing it means that if I want an exported legitimate environment variable that starts with parentheses, I can't then use it in a forked bash session.

What were they thinking of?

about a week ago
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Remote Exploit Vulnerability Found In Bash

jeremyp Re:Test string here: (399 comments)

Suppose you are a guest at my house and you want to ssh into your own computer at your house. I say no problem and I create you a user account on my computer which you then use to ssh to your computer.

Still don't think it's a problem?

Of course I could also have a key logger installed.

about a week ago
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Remote Exploit Vulnerability Found In Bash

jeremyp Re:Only CGI scripts affected? (399 comments)

Wouldn't it also display

grep mysekritpassword /usr/dict/words

in a ps -ef listing?

about a week ago
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Torvalds: No Opinion On Systemd

jeremyp Re:Simple set of pipelined utilties! (385 comments)

The argument is that, if pid 1 dies, everything dies. Also a big pid 1 presents a big attack surface for nasty people.

Of course the exact same argument applies to a kernel: if something goes wrong in the kernel, everything dies and a big kernel presents a big attack surface to nasty people. However, I observe Linux is not a microkernel but it has a reputation for both reliability and being relatively secure. On the other hand, the quality of the people developing the kernel seems to be higher than those developing systemd, or at least that is the perception I get from reading all the hate on the Internet.

about two weeks ago
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Scotland's Independence Vote Could Shake Up Industry

jeremyp Re:Ho hum (494 comments)

Most of the land that Scotland controls is mountains and other wilderness which isn't economically productive. Sure, it would get a lot of the oil, but that is a finite resource and when that's gone, what's left? I suppose they can turn themselves into a giant Highland Theme Park.

about two weeks ago
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Scotland's Independence Vote Could Shake Up Industry

jeremyp Re: it is all going to go horribly wrong (494 comments)

No it isn't. The UK is part of the EU. If Scotland leaves the UK, it leaves the EU. Yes, it will cause some practical difficulties but these would be only a few of the many practical difficulties that need to be resolved in the transition period.

about two weeks ago
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Scotland's Independence Vote Could Shake Up Industry

jeremyp Re:This isn't scaremongering. (494 comments)

Also an English guy, I don't think you understand that you've not exactly treated Scotland very well and that's one of the reasons it wants to leave.

Can you give some examples in which England has treated Scotland badly in the last twenty years? Or two hundred years?

Another reason is that much of oil England is harvesting is Scottish

Actually, it is the UK that is harvesting British oil. Except it's not the UK, it's oil companies who then pay taxes to the UK. The taxes then get used all over the UK according to need. This is the way most Western countries operate.

about two weeks ago
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Scotland's Independence Vote Could Shake Up Industry

jeremyp Re:at least the nuclear weapons will be gone (494 comments)

The UK's nuclear submarines are based in Scotland.

All of the jobs at the naval base in Faslane will be gone along with the nuclear weapons. A future Scottish government might, therefore, decide to allow the UK to continue to keep its submarines there.

about two weeks ago

Submissions

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Ordnance Survey Creates Minecraft Model of Great Britain

jeremyp jeremyp writes  |  1 year,8 days

jeremyp (130771) writes "Ordnance Survey intern Joseph Braybrook has created a Minecraft World based upon accurate terrain mapping data of Great Britain. The world accurately represents the whole of Great Britain and surrounding islands (but excludes Northern Ireland and the Channel Islands). It maps 224,000 square kilometres of Greast Britain and contains 22 billion blocks. Graham Dunlop (Ordnance Survey Innovation Lab Manager) says:

We think we may have created the largest Minecraft world ever built based on real-world data

The map can be downloaded from the Ordnance Survey here."

Journals

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Linux From Scratch

jeremyp jeremyp writes  |  more than 10 years ago

Following a comment I read in a recent Slashdot post, I decided to build a "Linux From Scratch" distribution. Interestingly, Linux From Scratch comes in the form of a book in HTML format - no software is included.

Following the book's instructions, you download the source packages you need to build a basic Linux system and then use the step by step instructions to get it working.

The idea is to set aside a partition on an existing Linux system and build the software there. I chose my "firewall box" as that is the only permanent Linux system I have. Interestingly, on running fdisk I found I have approximately 20 Gb of unused disk space on it - well i say "unused" it has the original Win 98 system that the box came with. I immediately reformatted about 10 Gb of space on the first disk as /boot, swap and / respectively (/ is a reiser FS partition) and rolled my sleeves up.

The methodology is to mount your new partitions on your original system, build a basic toolchain (compiler etc) and then chroot into your new "/" and literally build the Linux system from scratch. At the time of writing I am just starting the build of my new Linux - the final version of glibc is compiling (for at least two more hours :( ).

I have to say it's quite exciting building a Linux system from scratch. You have to hand create the directory structure, password file and group file among other things. OTOH the configure -> make -> make install cycle can get a bit tedious. BTW it's taken 24 hours of compiler time and about 8 hours of my time to get to where I am.

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You and DRH

jeremyp jeremyp writes  |  more than 11 years ago

OK, so your user name is miu and your home page is the biography page of Douglas Hofstadter. Are you him or merely a fan?

Also, I am deeply honoured to have a "friend" in slashdot although it's not obvious to me why you chose me.

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