[Dorset] Links from Last Night's Pub Meet.
There was eleven of us last night, so this is just the bits of
conversation I heard.
strace(1) is handy for looking at the system calls a program makes to
the kernel, try `groups' and then `sudo -i strace -tte file groups'.
Facebook's React has spread to Android and iOS. "React Native lets you
build mobile apps using only JavaScript. It uses the same design as
React, letting you compose a rich mobile UI from declarative
components." — https://facebook.github.io/react-native/
Python has descriptor classes; those with __get__(), __set__(), and
others. These functions get called when an instance of the class is in
another object's class dictionary.
https://docs.python.org/3/reference/datamodel.html#implementing-descriptors
>>> class Desc():
... def __get__(*a):
... print('get:', *a)
...
>>> class Foo():
... a = Desc()
...
>>> f = Foo()
>>> f.a
get: <__main__.Desc object at 0x7f4426523240>
<__main__.Foo object at 0x7f4426523278>
>>>
As well as duck typing, there's a convention in Python called, by some,
goose typing. Built-ins isinstance() and issubclass() bow to a `check'
function, if it's defined, and that can use reflection to do the test.
https://docs.python.org/3/library/collections.abc.html
https://www.python.org/dev/peps/pep-3119/
>>> from collections import abc
>>> class Iter:
... def __iter__(my):
... raise StopIteration
...
>>> issubclass(Iter, abc.Iterable)
True
>>> isinstance(Iter(), abc.Iterable)
True
>>> abc.Iterable.__instancecheck__
>
>>> abc.Iterable.__instancecheck__(Iter())
True
>>> abc.Iterable.__instancecheck__(list())
True
>>> abc.Iterable.__instancecheck__(dict())
True
>>> abc.Iterable.__instancecheck__(set())
True
>>> abc.Iterable.__instancecheck__(open('/dev/null'))
True
>>> abc.Iterable.__instancecheck__(lambda: None)
False
"Cython is an optimising static compiler for both the Python programming
language and the extended Cython programming language... The Cython
language is a superset of the Python language that additionally supports
calling C functions and declaring C types on variables and class
attributes. This allows the compiler to generate very efficient C code
from Cython code. The C code is generated once" — http://cython.org/
"Coconut is a functional programming language that compiles to Python [2
or 3]. Since all valid Python is valid Coconut, using Coconut will only
extend and enhance what you're already capable of in Python...
range(10) |> map$(pow$(?, 2)) |> list" — http://coconut-lang.org/
Undebt is Python that uses the handy PyParsing library to re-factor a
tree of source code, mapping an old fragment of grammar to new, e.g. `x
= x + 1' to `x += 1' regardless of the complexity of the expression `x'.
It can be used for any language, but comes with Python-grammar
definitions. A project could build up a set of transformations over
time that are repeatedly run to keep converting to the house style.
https://engineeringblog.yelp.com/2016/08/undebt-how-we-refactored-3-million-lines-of-code.html
gpg(1)'s -c is good for encrypting single files, rather than one of the
"zip" formats. By default, it compresses the plaintext before
encrypting.
$ dd if=/dev/zero bs=1k count=1k of=zeroes
1024+0 records in
1024+0 records out
1048576 bytes (1.0 MB, 1.0 MiB) copied, 0.012425 s, 84.4 MB/s
$ gpg -c zeroes
$ du *
1024zeroes
4 zeroes.gpg
$
"memfd_create() creates an anonymous file and returns a file descriptor
that refers to it. The file behaves like a regular file, and so can be
modified, truncated, memory-mapped, and so on. However, unlike a
regular file, it lives in RAM and has a volatile backing storage. ...a
simple alternative to manually mounting a tmpfs(5) filesystem and
creating and opening a file... ...primary purpose... used with the
file-sealing APIs provided by fcntl(2)." — memfd_create(2)
Using a fractional number of bits per input symbol. "arithmetic coding
encodes the entire message into a single number, an arbitrary-precision
fraction q where 0 ≤ q < 1"
— https://en.wikipedia.org/wiki/Arithmetic_coding
Persecution of a minority.
gauche Unsophisticated and socially awkward.
Mid 18th century: French, literally ‘left’.
— https://en.oxforddictionaries.com/definition/gauche
dexterous
Early 17th century (in the sense ‘mentally adroit’): from Latin
dexter ‘on the right’ + -ous.
— https://en.oxforddictionaries.com/definition/dexterous
sinister
Late Middle English (in the sense ‘malicious, underhand’): from
Old French sinistre or Latin sinister ‘left’.
— https://en.oxforddictionaries.com/definition/sinister
cack handed derogatory Left-handed.
Mid 19th century: from cack, in the sense ‘excrement’, + hand + -ed.
— htt
Re: [Dorset] Links from Last Night's Pub Meet.
Hi Tim, > Ah, memories of PIP PUN:=CON: in the days of good ol' CP/M Going back a bit further, http://www.masswerk.at/misc/card-punch-typography/ explains how IBM card punches would print the column's character on the top by selectively pressing down on 35 wires using a "code plate" that was an array of bumps, many milled off. Something else that came up last night. `^', on the `6' key on the keyboard, was called a caret by some, circumflex by others. ASCII and Unicode use circumflex because of its early use from typewriters of overstriking the following character to give a circumflex accent; the carriage wouldn't shift. But it seems it's from the caret mark added to text in proofreading to indicate something missing at that point. Unicode has three; caret that sits below the text, a caret for insertion, which is what we still do in handwriting, and a caron, an inverted caron for above the text, e.g. missing apostrophe. $ printf a‸b⁁cˇd | iconv -t ucs-2le | hexdump -ve '/2 "%04x\n"' 0061 2038 0062 2041 0063 02c7 0064 $ Cheers, Ralph. -- Next meeting: Bournemouth, Tuesday, 2017-03-07 20:00 Meets, Mailing list, IRC, LinkedIn, ... http://dorset.lug.org.uk/ New thread: mailto:dorset@mailman.lug.org.uk / CHECK IF YOU'RE REPLYING Reporting bugs well: http://goo.gl/4Xue / TO THE LIST OR THE AUTHOR
Re: [Dorset] Links from Last Night's Pub Meet.
On 08/02/17 12:44, John Carlyle-Clarke wrote: Isn't backwards compatibility great? Reminds me of this oddity that still exists in Windows http://superuser.com/questions/613313/why-cant-we-make-con-prn-null-folder-in-windows Ah, memories of PIP PUN:=CON: in the days of good ol' CP/M Cheers Tim On 8 February 2017 at 12:06, Ralph Corderoy wrote: Hi, One main thing; poking about an NTFS filesystem mounted with ntfs-3g on a Linux laptop using FUSE. Many of the files showed a link count of two, that second field from `ls -l', but there was no second occurrence of the file's inode number on the filesystem. ntfs-3g's support forum has an explanation. http://tuxera.com/forum/viewtopic.php?f=2&t=858&p= 3383&hilit=link+count+2&sid=fa22e085b9df90934edc125c1bcf70bb#p3383 A short 8.3 name is present, but not returned by readdir(3) so can't be found. It can be accessed by name, e.g. FOOBAR~1.TXT, if you guess correctly. Short names aren't created for new files. We did think it might be this, but the deception doesn't persist to the inode-count output of `stat -f'. That showed a lot less inodes used than the sum of all the link counts for all the filesystem's contents. If on Windows, there also seems to be a `fsutil 8dot3name' command to manipulate the 8.3 name; that would presumably lower the displayed count in Linux to one confirming it's the cause. https://technet.microsoft.com/en-us/library/ff621566%28v=ws.10%29.aspx Cheers, Ralph. -- Next meeting: Bournemouth, Tuesday, 2017-03-07 20:00 Meets, Mailing list, IRC, LinkedIn, ... http://dorset.lug.org.uk/ New thread: mailto:dorset@mailman.lug.org.uk / CHECK IF YOU'RE REPLYING Reporting bugs well: http://goo.gl/4Xue / TO THE LIST OR THE AUTHOR -- Next meeting: Bournemouth, Tuesday, 2017-03-07 20:00 Meets, Mailing list, IRC, LinkedIn, ... http://dorset.lug.org.uk/ New thread: mailto:dorset@mailman.lug.org.uk / CHECK IF YOU'RE REPLYING Reporting bugs well: http://goo.gl/4Xue / TO THE LIST OR THE AUTHOR
Re: [Dorset] Links from Last Night's Pub Meet.
Isn't backwards compatibility great? Reminds me of this oddity that still exists in Windows http://superuser.com/questions/613313/why-cant-we-make-con-prn-null-folder-in-windows On 8 February 2017 at 12:06, Ralph Corderoy wrote: > Hi, > > One main thing; poking about an NTFS filesystem mounted with ntfs-3g on > a Linux laptop using FUSE. Many of the files showed a link count of > two, that second field from `ls -l', but there was no second occurrence > of the file's inode number on the filesystem. > > ntfs-3g's support forum has an explanation. > http://tuxera.com/forum/viewtopic.php?f=2&t=858&p= > 3383&hilit=link+count+2&sid=fa22e085b9df90934edc125c1bcf70bb#p3383 > A short 8.3 name is present, but not returned by readdir(3) so can't be > found. It can be accessed by name, e.g. FOOBAR~1.TXT, if you guess > correctly. Short names aren't created for new files. > > We did think it might be this, but the deception doesn't persist to the > inode-count output of `stat -f'. That showed a lot less inodes used > than the sum of all the link counts for all the filesystem's contents. > > If on Windows, there also seems to be a `fsutil 8dot3name' command to > manipulate the 8.3 name; that would presumably lower the displayed > count in Linux to one confirming it's the cause. > https://technet.microsoft.com/en-us/library/ff621566%28v=ws.10%29.aspx > > Cheers, Ralph. > > -- > Next meeting: Bournemouth, Tuesday, 2017-03-07 20:00 > Meets, Mailing list, IRC, LinkedIn, ... http://dorset.lug.org.uk/ > New thread: mailto:dorset@mailman.lug.org.uk / CHECK IF YOU'RE REPLYING > Reporting bugs well: http://goo.gl/4Xue / TO THE LIST OR THE AUTHOR -- Next meeting: Bournemouth, Tuesday, 2017-03-07 20:00 Meets, Mailing list, IRC, LinkedIn, ... http://dorset.lug.org.uk/ New thread: mailto:dorset@mailman.lug.org.uk / CHECK IF YOU'RE REPLYING Reporting bugs well: http://goo.gl/4Xue / TO THE LIST OR THE AUTHOR
[Dorset] Links from Last Night's Pub Meet.
Hi, One main thing; poking about an NTFS filesystem mounted with ntfs-3g on a Linux laptop using FUSE. Many of the files showed a link count of two, that second field from `ls -l', but there was no second occurrence of the file's inode number on the filesystem. ntfs-3g's support forum has an explanation. http://tuxera.com/forum/viewtopic.php?f=2&t=858&p=3383&hilit=link+count+2&sid=fa22e085b9df90934edc125c1bcf70bb#p3383 A short 8.3 name is present, but not returned by readdir(3) so can't be found. It can be accessed by name, e.g. FOOBAR~1.TXT, if you guess correctly. Short names aren't created for new files. We did think it might be this, but the deception doesn't persist to the inode-count output of `stat -f'. That showed a lot less inodes used than the sum of all the link counts for all the filesystem's contents. If on Windows, there also seems to be a `fsutil 8dot3name' command to manipulate the 8.3 name; that would presumably lower the displayed count in Linux to one confirming it's the cause. https://technet.microsoft.com/en-us/library/ff621566%28v=ws.10%29.aspx Cheers, Ralph. -- Next meeting: Bournemouth, Tuesday, 2017-03-07 20:00 Meets, Mailing list, IRC, LinkedIn, ... http://dorset.lug.org.uk/ New thread: mailto:dorset@mailman.lug.org.uk / CHECK IF YOU'RE REPLYING Reporting bugs well: http://goo.gl/4Xue / TO THE LIST OR THE AUTHOR
[Dorset] Links from Last Night's Pub Meet.
Hi, Terry, don't think your searching (Google?) found the first of these; top hit for me. The others might be useful to look at given your simple needs. http://getbootstrap.com/css/ http://purecss.io/ http://getskeleton.com/ And then https://angularjs.org/ was the bigger framework mentioned, and http://diveintohtml5.info/ could give you a useful brief overview of how things have changd since your last foray. To generate the https://en.wikipedia.org/wiki/Qr_code for visitors to open you might want to use the site linked from http://research.swtch.com/qart so you've an option to make it pictorial. Natalie's new machine for Android development was from http://www.pcspecialist.co.uk/. (Terry's son is still awaiting delivering of the UEFI graphics card from Amazon.) That one-line of Go to determine the size of an unsigned integer type in bytes at compile time. Not normal Go! More a puzzle. https://play.golang.org/p/8H0zyOYQzL Cheers, Ralph. -- Next meeting: Bournemouth, Tuesday, 2016-09-06 20:00 Meets, Mailing list, IRC, LinkedIn, ... http://dorset.lug.org.uk/ New thread: mailto:dorset@mailman.lug.org.uk / CHECK IF YOU'RE REPLYING Reporting bugs well: http://goo.gl/4Xue / TO THE LIST OR THE AUTHOR
Re: [Dorset] Links from Last Night's Pub Meet.
On Wednesday, 4 May 2016 07:00:17 BST Ralph Corderoy wrote: > "A quine is a non-empty computer program which takes no input and > produces a copy of its own source code as its only output." -- > https://en.wikipedia.org/wiki/Quine_%28computing%29 > > World War Ⅱ voice encryption used by Allies. Claude Shannon and Alan > Turing involved. One-time pad in the form of a white-noise record. > Weighed 50 tons. One installation was 200ft underground beneath > Selfridges. https://en.wikipedia.org/wiki/SIGSALY and: Film Star Hedy Lamarr (I think I said Dorothy Lamour at the time) who indirectly invented the frequency hopping radio: https://en.wikipedia.org/wiki/Hedy_Lamarr Apart from that we discussed the merits and demerits of hybrid engines in the light of the Chancellor's removal of Road Tax concessions from all but zero emissions vehicles: http://www.which.co.uk/news/2016/03/one-year-left-to-buy-a-hybrid-free-of-car-tax-437790/ I hadn't realised that Chelsea Tractors and other planet killers will actually benefit while the greener cars will be penalised. Someone has their priorities back to front. -- Terry Coles -- Next meeting: Bournemouth, Tuesday, 2016-06-07 20:00 Meets, Mailing list, IRC, LinkedIn, ... http://dorset.lug.org.uk/ New thread: mailto:dorset@mailman.lug.org.uk / CHECK IF YOU'RE REPLYING Reporting bugs well: http://goo.gl/4Xue / TO THE LIST OR THE AUTHOR
[Dorset] Links from Last Night's Pub Meet.
Hi, "A quine is a non-empty computer program which takes no input and produces a copy of its own source code as its only output." -- https://en.wikipedia.org/wiki/Quine_%28computing%29 World War Ⅱ voice encryption used by Allies. Claude Shannon and Alan Turing involved. One-time pad in the form of a white-noise record. Weighed 50 tons. One installation was 200ft underground beneath Selfridges. https://en.wikipedia.org/wiki/SIGSALY Cheers, Ralph. -- Next meeting: Bournemouth, Tuesday, 2016-06-07 20:00 Meets, Mailing list, IRC, LinkedIn, ... http://dorset.lug.org.uk/ New thread: mailto:dorset@mailman.lug.org.uk / CHECK IF YOU'RE REPLYING Reporting bugs well: http://goo.gl/4Xue / TO THE LIST OR THE AUTHOR
Re: [Dorset] Links from Last Night's Pub Meet.
On Wed, 03 Feb 2016 18:21:52 +, d-...@hadrian-way.co.uk said: > Is there another way to create a list of > packages that can be passed to apt-get, to re-install everything? /usr/bin/dpkg --get-selections "*" > package.selections ..to save a list of packages. To install that same list: dpkg --set-selections < package.selections apt-get -u dselect-upgrade -- "One can never know for sure what a deserted area looks like" - George Carlin -- Next meeting: Bournemouth, Tuesday, 2016-03-01 20:00 Meets, Mailing list, IRC, LinkedIn, ... http://dorset.lug.org.uk/ New thread: mailto:dorset@mailman.lug.org.uk / CHECK IF YOU'RE REPLYING Reporting bugs well: http://goo.gl/4Xue / TO THE LIST OR THE AUTHOR
Re: [Dorset] Links from Last Night's Pub Meet.
On Wednesday 03 February 2016 17:40:46 Peter Merchant wrote: > And there was a discussion on using Synaptic to give a list of > installed packages, which didn't work on Clive's machine (Mint 17). Yes. I meant to ask about this, but everyone was busy at the time. Some years ago, I gave Mint a try (this was when KDE 4 came out and I was particularly depressed about it). As it happened, I wasn't particularly taken with Mint at the time and KDE improved, so I went back to Kubuntu. However, one thing I did like was their upgrade strategy, which at the time was not an upgrade at all, but a clean install, then re-installation of all the original packages using a script containing their identities. This was generated by Mint before the upgrade took place. It seems that the Mint Team abandoned that strategy and went for the regular full upgrade as favoured by Ubuntu and the like. Certainly, when I looked, I couldn't find the option and that's when we had a look in Synaptic, because it has a 'Generate package download script' and I thought that might fit the bill (it doesn't). Does anyone remember the tool I saw back around Mint 15 or so? Is there another way to create a list of packages that can be passed to apt-get, to re-install everything? -- Terry Coles -- Next meeting: Bournemouth, Tuesday, 2016-03-01 20:00 Meets, Mailing list, IRC, LinkedIn, ... http://dorset.lug.org.uk/ New thread: mailto:dorset@mailman.lug.org.uk / CHECK IF YOU'RE REPLYING Reporting bugs well: http://goo.gl/4Xue / TO THE LIST OR THE AUTHOR
Re: [Dorset] Links from Last Night's Pub Meet.
On 03/02/16 13:43, Terry Coles wrote: On Wednesday 03 February 2016 13:03:12 Ralph Corderoy wrote: Terry's not getting all he expects from his https://en.wikipedia.org/wiki/MOSFET and has bought a scope. Link, Terry? http://www.picaxe.com/Hardware/Add-on-Modules/PCB-scope/[1] And there was a discussion on using Synaptic to give a list of installed packages, which didn't work on Clive's machine (Mint 17). And discussion of savings and ISA's at Tesco, NS&I and ? P. -- Next meeting: Bournemouth, Tuesday, 2016-03-01 20:00 Meets, Mailing list, IRC, LinkedIn, ... http://dorset.lug.org.uk/ New thread: mailto:dorset@mailman.lug.org.uk / CHECK IF YOU'RE REPLYING Reporting bugs well: http://goo.gl/4Xue / TO THE LIST OR THE AUTHOR
Re: [Dorset] Links from Last Night's Pub Meet.
On Wednesday 03 February 2016 13:03:12 Ralph Corderoy wrote: > Terry's not getting all he expects from his > https://en.wikipedia.org/wiki/MOSFET and has bought a scope. Link, > Terry? http://www.picaxe.com/Hardware/Add-on-Modules/PCB-scope/[1] > Some oscilloscope traces of a Raspberry Pi's GPIO pulsing, i.e. software > PWM, showing glitches. > http://jeelabs.org/2013/06/16/oscilloscope-sampling-rate/index.html > Aside: That first trace shows an overshoot on 0→1 and an undershoot on > the return. I'm used to seeing that rather than a neat square wave and > thought it was the behaviour of the GPIO pin, but it was suggested it's > an artifact of the measuring, e.g. scope quality. Anyone here know? It could be either. What you are seeing is 'ringing' or resonance in the circuit. If the scope input is properly terminated it can be reduced, but if the GPIO pin is producing the ringing then the scope would be lying if the overshoot was damped. Anyone developing a circuit as part of a product would be expected to identify the cause and resolve it. If you are just measuring the O/P from a pre-existing device, then you just have to accept that it's there, if you have the right kind of probe. That looks like a 3.3 V logic signal and the overshoots do not stray anywhere near the thresholds for a '0' or a '1', (typically 0.8 V and 2 V respectively), so I would be inclined to ignore them. > More Pi PWM! How the pthread-based RPi.GPIO does its calculations. > Also, it works out how long to sleep, and ignores any overrun, e.g. the > Zero's single core was busy running the Linux kernel or Python, and so > the signal will stretch rather than shorten the next to compensate. > http://sourceforge.net/p/raspberry-gpio-python/code/ci/default/tree/source/s > oft_pwm.c#l173 Thanks. -- Terry Coles [1] http://www.picaxe.com/Hardware/Add-on-Modules/PCB-scope/ -- Next meeting: Bournemouth, Tuesday, 2016-03-01 20:00 Meets, Mailing list, IRC, LinkedIn, ... http://dorset.lug.org.uk/ New thread: mailto:dorset@mailman.lug.org.uk / CHECK IF YOU'RE REPLYING Reporting bugs well: http://goo.gl/4Xue / TO THE LIST OR THE AUTHOR
[Dorset] Links from Last Night's Pub Meet.
Hi, Draw circuits with pixels. A power source is a 2x2 block. Crossing wires that don't interconnect simply miss out the common pixel. Transistors are T junctions, and drop the wire's current by one. Iterate the circuit until a state is seen for the second time; that defines the animated GIF. https://github.com/martinkirsche/wired-logic#readme His example, use the browser to zoom in, is https://raw.githubusercontent.com/martinkirsche/wired-logic/master/examples/output.gif Note the cross hatching to draw the seven-segment LED. :-) Terry's not getting all he expects from his https://en.wikipedia.org/wiki/MOSFET and has bought a scope. Link, Terry? Some oscilloscope traces of a Raspberry Pi's GPIO pulsing, i.e. software PWM, showing glitches. http://jeelabs.org/2013/06/16/oscilloscope-sampling-rate/index.html Aside: That first trace shows an overshoot on 0→1 and an undershoot on the return. I'm used to seeing that rather than a neat square wave and thought it was the behaviour of the GPIO pin, but it was suggested it's an artifact of the measuring, e.g. scope quality. Anyone here know? Speed, ignoring glitches, of software PWM on the Pi with different software, e.g. /bin/sh v. C. http://codeandlife.com/2012/07/03/benchmarking-raspberry-pi-gpio-speed/ More Pi PWM! How the pthread-based RPi.GPIO does its calculations. Also, it works out how long to sleep, and ignores any overrun, e.g. the Zero's single core was busy running the Linux kernel or Python, and so the signal will stretch rather than shorten the next to compensate. http://sourceforge.net/p/raspberry-gpio-python/code/ci/default/tree/source/soft_pwm.c#l173 Cheers, Ralph. -- Next meeting: Bournemouth, Tuesday, 2016-03-01 20:00 Meets, Mailing list, IRC, LinkedIn, ... http://dorset.lug.org.uk/ New thread: mailto:dorset@mailman.lug.org.uk / CHECK IF YOU'RE REPLYING Reporting bugs well: http://goo.gl/4Xue / TO THE LIST OR THE AUTHOR
Re: [Dorset] Links from Last Night's Pub Meet.
Hi Peter, > > > Haven't seen this, but might be interesting. Marcus du Sautoy > > > spends an hour looking at algorithms for the layman. 60 minutes. > > > Available for about another three weeks, but get_iplayer could > > > always just save it to disk until you've spare time. > > > http://www.bbc.co.uk/iplayer/episode/p030s6b3/the-secret-rules-of-modern-living-algorithms > > I watched this. Didn't get much out of it. Dumbed down for the average > TV viewer. Well, it was never going to be OU beards and sandals on a Sunday morning. :-) I've seen most of it now, and it's got across Euclid's Algorithm, though not why it works, and has gone through Bubble Sort and Merge Sort, showing they differ greatly as N increases. Now it's on to categorising problems into "hardness" and how some haven't been categorised yet. I've learnt nothing, but it's been enjoyable and worth sending onto my relatives who wonder what it is I do exactly. Cheers, Ralph. -- Next meeting: Bournemouth, Tuesday, 2015-11-03 20:00 Meets, Mailing list, IRC, LinkedIn, ... http://dorset.lug.org.uk/ New thread: mailto:dorset@mailman.lug.org.uk / CHECK IF YOU'RE REPLYING Reporting bugs well: http://goo.gl/4Xue / TO THE LIST OR THE AUTHOR
Re: [Dorset] Links from Last Night's Pub Meet.
I watched this. Didn't get much out of it. Dumbed down for the average TV viewer. Peter Haven't seen this, but might be interesting. Marcus du Sautoy spends an hour looking at algorithms for the layman. 60 minutes. Available for about another three weeks, but get_iplayer could always just save it to disk until you've spare time. http://www.bbc.co.uk/iplayer/episode/p030s6b3/the-secret-rules-of-modern-liv ing-algorithms -- Next meeting: Bournemouth, Tuesday, 2015-11-03 20:00 Meets, Mailing list, IRC, LinkedIn, ... http://dorset.lug.org.uk/ New thread: mailto:dorset@mailman.lug.org.uk / CHECK IF YOU'RE REPLYING Reporting bugs well: http://goo.gl/4Xue / TO THE LIST OR THE AUTHOR
Re: [Dorset] Links from Last Night's Pub Meet.
Some additions from the other table: On Wednesday 07 Oct 2015 09:41:01 Ralph Corderoy wrote: > I'd never heard of this, but Terry was passing through at the time. > https://en.wikipedia.org/wiki/1964_Aberdeen_typhoid_outbreak I hadn't realised it was '64; I was 14 then! > Haven't seen this, but might be interesting. Marcus du Sautoy spends an > hour looking at algorithms for the layman. 60 minutes. Available for > about another three weeks, but get_iplayer could always just save it to > disk until you've spare time. > http://www.bbc.co.uk/iplayer/episode/p030s6b3/the-secret-rules-of-modern-liv > ing-algorithms > > I was asked about some of the uses of directories on the disk. > https://en.wikipedia.org/wiki/Filesystem_Hierarchy_Standard explains > some of them. Chris inveigled me into trying idAngels: https://idangels.net/about.php[1] which he is complicit in :-) We talked about Dorset Explorer: http://explorer.geowessex.com/[2] which allows you to view OS mapping (amongst other this and overlay other date on top, such as 1800s historic mapping or flood risk areas. We talked about historic computers, such as the BBC Micro and Amiga, plus the use of some fairly ancient languages. We discussed SSD Drives and the use of noatime, relatime, discard and fstrim. You may recall that I raised this originally on this list some time ago under the tread 'Using 2.5" SSD Drives in a 3.5" enclosure'. Anything else I forgot? -- Terry Coles [1] https://idangels.net/about.php [2] http://explorer.geowessex.com/ -- Next meeting: Bournemouth, Tuesday, 2015-11-03 20:00 Meets, Mailing list, IRC, LinkedIn, ... http://dorset.lug.org.uk/ New thread: mailto:dorset@mailman.lug.org.uk / CHECK IF YOU'RE REPLYING Reporting bugs well: http://goo.gl/4Xue / TO THE LIST OR THE AUTHOR
[Dorset] Links from Last Night's Pub Meet.
Hi, I'd never heard of this, but Terry was passing through at the time. https://en.wikipedia.org/wiki/1964_Aberdeen_typhoid_outbreak Haven't seen this, but might be interesting. Marcus du Sautoy spends an hour looking at algorithms for the layman. 60 minutes. Available for about another three weeks, but get_iplayer could always just save it to disk until you've spare time. http://www.bbc.co.uk/iplayer/episode/p030s6b3/the-secret-rules-of-modern-living-algorithms I was asked about some of the uses of directories on the disk. https://en.wikipedia.org/wiki/Filesystem_Hierarchy_Standard explains some of them. Cheers, Ralph. -- Next meeting: Bournemouth, Tuesday, 2015-11-03 20:00 Meets, Mailing list, IRC, LinkedIn, ... http://dorset.lug.org.uk/ New thread: mailto:dorset@mailman.lug.org.uk / CHECK IF YOU'RE REPLYING Reporting bugs well: http://goo.gl/4Xue / TO THE LIST OR THE AUTHOR
