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I'm enthusiatic in my support for the TransWilts train services, but I'm not an enthusiast. And I'm not an expert on any aspects of the railways, but I have some expertise on aspects of how the railway runs. Such is the symantics of my ongoing pressures for an appropriate level of train service for ....

991 - Adding a member to a Hash in Ruby

In Ruby, you must initialise your variables - in other words, you cannot use the content of a variable that doesn't exist and have the language assume it will be 0, as happened with Perl. So if - for example - you're using a Hash to keep tabs of a number of counters, you can't just +=1 members and ....

990 - Ruby - Totally Topical

Ruby supports topicalisation - the $_ variable being set by certain statements when a piece of code such as gets in a while statement isn't assigned, and the the same variable being used in many other methods - and even as the object on which methods run by default - in following code. Here's a pie ....

989 - Melksham Quiz

Q: In what year did Charles Maggs set up a Rope factory in Spa Road, Melksham? That's one of the questions from a quiz... where all the answers were numbers... that I set up for the ladies of the Bowerhill Villager for their Christmas quiz last night. The theme wasn't "Christmas" but there was cert ....

988 - You should think you're first in a hotel room

"We want our rooms to appear to be so clean, fresh and new that each guest feels he's the first to use them". A laudable target, but realistically one that's not going to be achievable for every single letting. Never the less, I was shocked to be asked by a delegate this morning "did Axxxxx Dxxxxx ....

987 - Ruby v Perl - interpollating variables

When printing in Perl, you can drop a variable into a double quoted string ant it will be interpretter for you: "--- $number ---" If you want to perform an operation on the variable, though, it's not as easy - you have to come out of the double quoted string, do the calculation, then start another ....

986 - puts - opposite of chomp in Ruby

In Ruby, the chomp method removes the last character of a string if it's a line separator. The puts method adds a new line character on to the output unless there's one already present. In Perl and other languages, a great deal of time and mental agility is expended in remembering where there are ....

985 - Equality in Ruby - == eql? and equal?

The == comparison checks whether two values are equal eql? checks if two values are equal and of the same type equal? checks if two things are one and the same object. How do I remember which is which ... The longer the operator, the more restrictive the test it performs Example: irb(main):013: ....

984 - Cardinal numbers and magic numbers

A cardinal number, in computing terms, is a term that's sometimes used to refer to a fixed condition - in other words, you might call a function with one parameter should of the usual number, and the final value will be assigned a cardinal number that can't occur there in reality. For example, you m ....

983 - Blessing in Perl / Member variable in Ruby

How do you decide what member variables you have in an object in Ruby? Well - in Perl, you bless a single hash (or, exceptionally, a list or a scaler), but in Ruby you refer to each variable that you wish to be a member of each object using a preceeding @ character. Perl: bless \%abc; Ruby: @a ....

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Have you ever looked back through old magazines for an article which you know you read, but you can't remember which issue it was in? There's a timeless quality to many articles written in newspapers, magazines, and blogs that gives lie to the 'dated' nature of the medium. This page allows you to search through the now-extensive archives of "The Horse's Mouth", looking for certain text in the title.

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