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Dark mornings, dog update, and Python and Lua courses before Christmas

It's significantly darker each morning as we take Gypsy and Billy out for a morning walk. We're out well before sunrise now, which was at 07:29 on his first morning with us, it is at 08:04 today - just a fortnight later - and will be at 08:16 by 31st December. Only from 1st January does it start getting lighter earlier in the mornings.

It's commonly - and correctly - thought that the days get longer from 21st December, or there abouts, so why does it still get darker in the mornings for a further 10 days beyond then? It's because it starts staying lighter in the evenings from about today (10th December), and by around 21st the evenings are getting lighter quicker that the mornings are getting darker. I understand this offset is caused by the wobble on the earth's axis - probably (but I've not done the maths) the same wobble that causes the seasons. There's a table of sunrise, sunset and day length figures [here] if you would like to look at the data.

Gypsy and Billy are both black dogs. So this makes it rather difficult to photograph them and show how they're getting on during their morning walks. A black shape against a dark grey background flying past us indicates where one - or other - of them is, and, yes, there's enough predawn light to make them out in the distance. A very good friend told me when Gypsy arrived that "a Lurcher will always stay with you, but a Lucher's definition of 'with' may be more liberal than yours", and we have learned with Gypsy that she's always got her good eye on us - even a field's width away. Billy has been through a number of homes, feels less secure at the moment, and stays significantly closer. But it is good to see him moving, well far enough away to run - to make great high speed circles around us and the field. And there comes another problem with taking a low light picture ... by the time the camera button's been pressed and the exposure has been worked out, the dog's no longer in the area that the camera is pointing at.

Billy and DadHowever, these days we have cameras built in to our computers - much used for video calls and meetings via Skype, and there's a toy called "Photo Booth" for recording stills too. Here's Billy and me answering an email on Thursday evening.


Pillow FightAnd here's Lisa taking a few quiet minutes with Gypsy, Charlie and Billy - I turned the computer around to capture this one! As I write this, Billy is again supervising. It's 06:20, so an hour or so before we'll be getting up. Gypsy's snoozing at my feet, Charlie and Lisa are already risen, catching up on a backlog of paperwork which has built up (I wonder why?) in the last two week. I start a Learning to program in Python course tomorrow - and indeed I have a pick up from Melksham station, for delegate, for the course at 15:48 this afternoon. And from Thursday onwards (through next weekend), I have a Learning to program in Lua course that I'll be presenting.


(written 2011-12-10, updated 2011-12-17)

 
Associated topics are indexed as below, or enter http://melksh.am/nnnn for individual articles
P205 - Perl - Initial String Handling
  [3770] Sample answers to training course exercises - available on our web site - (2012-06-21)
  [3547] Using Perl to generate multiple reports from a HUGE file, efficiently - (2011-12-09)
  [3411] Single and double quotes strings in Perl - what is the difference? - (2011-08-30)
  [3005] Lots of ways of doing it in Perl - printing out answers - (2010-10-19)
  [2963] Removing the new line with chop or chomp in Perl - what is the difference? - (2010-09-21)
  [2832] Are you learning Perl? Some more examples for you! - (2010-06-27)
  [2816] Intelligent Matching in Perl - (2010-06-18)
  [2798] Perl - skip the classics and use regular expressions - (2010-06-08)
  [1860] Seven new intermediate Perl examples - (2008-10-30)
  [1849] String matching in Perl with Regular Expressions - (2008-10-20)
  [1608] Underlining in Perl and Python - the x and * operator in use - (2008-04-12)
  [1195] Regular Express Primer - (2007-05-20)
  [987] Ruby v Perl - interpollating variables - (2006-12-15)
  [970] String duplication - x in Perl, * in Python and Ruby - (2006-12-07)
  [324] The backtick operator in Python and Perl - (2005-05-25)
  [254] x operator in Perl - (2005-03-22)
  [31] Here documents - (2004-08-28)

P207 - Perl - File Handling
  [3839] Spraying data from one incoming to series of outgoing files in Perl - (2012-08-15)
  [3830] Traversing a directory in Perl - (2012-08-08)
  [3326] Finding your big files in Perl - design considerations beyond the course environment - (2011-06-14)
  [2833] Fresh Perl Teaching Examples - part 2 of 3 - (2010-06-27)
  [2821] Chancellor George Osborne inspires Perl Program - (2010-06-22)
  [2818] File open and read in Perl - modernisation - (2010-06-19)
  [2405] But I am reading from a file - no need to prompt (Perl) - (2009-09-14)
  [2233] Transforming data in Perl using lists of lists and hashes of hashes - (2009-06-12)
  [1861] Reactive (dynamic) formatting in Perl - (2008-10-31)
  [1841] Formatting with a leading + / Lua and Perl - (2008-10-15)
  [1709] There is more that one way - Perl - (2008-07-14)
  [1467] stdout v stderr (Tcl, Perl, Shell) - (2007-12-10)
  [1442] Reading a file multiple times - file pointers - (2007-11-23)
  [1416] Good, steady, simple example - Perl file handling - (2007-10-30)
  [1312] Some one line Perl tips and techniques - (2007-08-21)
  [867] Being sure to be positive in Perl - (2006-09-15)
  [702] Iterators - expressions tha change each time you call them - (2006-04-27)
  [618] Perl - its up to YOU to check your file opened - (2006-02-23)
  [616] printf - a flawed but useful function - (2006-02-22)
  [255] STDIN, STDOUT, STDERR and DATA - Perl file handles - (2005-03-23)
  [114] Relative or absolute milkman - (2004-11-10)
  [12] How many people in a room? - (2004-08-12)

P208 - Perl - Lists
  [4609] Mapping an array / list without a loop - how to do it in Perl 6 - (2016-01-03)
  [3939] Lots of ways of doing the same thing in Perl - list iteration - (2012-12-03)
  [3906] Taking the lead, not the dog, for a walk. - (2012-10-28)
  [3870] Writing more maintainable Perl - naming fields from your data records - (2012-09-25)
  [3669] Stepping through a list (or an array) in reverse order - (2012-03-23)
  [3400] $ is atomic and % and @ are molecular - Perl - (2011-08-20)
  [2996] Copying - duplicating data, or just adding a name? Perl and Python compared - (2010-10-12)
  [2813] Iterating over a Perl list and changing all items - (2010-06-15)
  [2484] Finding text and what surrounds it - contextual grep - (2009-10-30)
  [2295] The dog is not in trouble - (2009-07-17)
  [2226] Revision / Summary of lists - Perl - (2009-06-10)
  [2067] Perl - lists do so much more than arrays - (2009-03-05)
  [1918] Perl Socket Programming Examples - (2008-12-02)
  [1917] Out of memory during array extend - Perl - (2008-12-02)
  [1828] Perl - map to process every member of a list (array) - (2008-10-09)
  [1703] Perl ... adding to a list - end, middle, start - (2008-07-09)
  [1316] Filtering and altering Perl lists with grep and map - (2007-08-23)
  [1304] Last elements in a Perl or Python list - (2007-08-16)
  [968] Perl - a list or a hash? - (2006-12-06)
  [928] C++ and Perl - why did they do it THAT way? - (2006-11-16)
  [773] Breaking bread - (2006-06-22)
  [762] Huge data files - what happened earlier? - (2006-06-15)
  [622] Queues and barrel rolls in Perl - (2006-02-24)
  [560] The fencepost problem - (2006-01-10)
  [463] Splitting the difference - (2005-10-13)
  [355] Context in Perl - (2005-06-22)
  [240] Conventional restraints removed - (2005-03-09)
  [230] Course sizes - beware of marketing statistics - (2005-02-27)
  [140] Comparison Chart for Perl programmers - list functions - (2004-12-04)
  [28] Perl for breakfast - (2004-08-25)

Q101 - Object Orientation and General technical topics - Programming Principles
  [4645] What are callbacks? Why use them? An example in Python - (2016-02-11)
  [4632] Remember to ask the question before you listen for the answer - (2016-01-26)
  [4611] Hungarian, Camel, Snake and Kebab - variable naming conventions - (2016-01-03)
  [4325] Learning to program - what are algorithms and design patterns? - (2014-11-22)
  [4206] Writing the perfect program in Tcl? - (2013-11-13)
  [4153] Rooms available tonight - how to code an algorithm from first principles - (2013-08-19)
  [4118] We not only teach PHP and Python - we teach good PHP and Python Practice! - (2013-06-18)
  [4090] Test Driven Development in Python - Customer Comes First - (2013-05-16)
  [4061] Seamless, integrated IT - we have a long way to go! - (2013-04-11)
  [4003] Web and console - same principle, same code - Ruby example - (2013-02-14)
  [3954] Lesson 1 in programing - write clean, reuseable and maintainable tidy code - (2012-12-16)
  [3928] Storing your intermediate data - what format should you you choose? - (2012-11-20)
  [3878] From Structured to Object Oriented Programming. - (2012-10-02)
  [3673] Object oriented or structured - a comparison in Python. Also writing clean regular expressions - (2012-03-26)
  [3551] Some terms used in programming (Biased towards Python) - (2011-12-12)
  [3542] What order are operations performed in, in a Perl expression? - (2011-12-07)
  [3456] Stepping stones - early coding, and writing re-usable code quickly - (2011-09-24)
  [3026] Coding efficiency - do not repeat yourself! - (2010-11-02)
  [2964] An introduction to file handling in programs - buffering, standard in and out, and file handles - (2010-09-21)
  [2915] Looking up a value by key - associative arrays / Hashes / Dictionaries - (2010-08-11)
  [2878] Program for reliability and efficiency - do not duplicate, but rather share and re-use - (2010-07-19)
  [2769] Easy - but for whom? - (2010-05-18)
  [2737] Improving your function calls (APIs) - General and PHP - (2010-04-24)
  [2586] And and Or illustrated by locks - (2010-01-17)
  [2550] Do not copy and paste code - there are much better ways - (2009-12-26)
  [2510] The music of the stock market - (2009-11-22)
  [2415] Variable names like i and j - why? - (2009-09-22)
  [2327] Planning! - (2009-08-08)
  [2310] Learning to write high quality code in Lua - (2009-07-30)
  [2228] Where do I start when writing a program? - (2009-06-11)
  [2022] Pre and post increment - the ++ operator - (2009-02-03)
  [2001] I have not programmed before, and need to learn - (2009-01-19)


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Some other Articles
Melksham Training Centre and Hotel internet speed - how does it compare?
Provide a useable train service, and people will use it!
Well House Manor - perhaps the best hotel rooms in Melksham
Dark mornings, dog update, and Python and Lua courses before Christmas
The difference between dot (a.k.a. full stop, period) and comma in Perl
Finding all matches to a pattern in Perl regular expressions
Looking for hotel rooms in Melksham over Christmas? We still have some availability
Some different pictures from Melksham
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This is a page archived from The Horse's Mouth at http://www.wellho.net/horse/ - the diary and writings of Graham Ellis. Every attempt was made to provide current information at the time the page was written, but things do move forward in our business - new software releases, price changes, new techniques. Please check back via our main site for current courses, prices, versions, etc - any mention of a price in "The Horse's Mouth" cannot be taken as an offer to supply at that price.

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