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370 - From Iceland
As you may have read over the last few days, I'm away this week ... although we have continuity arrangements (thanks, Leah!) to ensure that there's still a daily tip / message here. But when I spotted an RJ45 connector on the wall in this hotel room, I couldn't resist ... having a great time in Se ....

369 - CMS - the minefield of Choices
So you want to have a web site on which your contributors can easily edit their content without the need to become experts in web site work. Where they can take a look and feel across a number of pages and each be responsible for their own content, meaning that updates can easily be applied with ....

368 - Vacation Week
Everyone needs an annual holiday - and it'll be ours for the rest of this week. We'll be recharging our batteries in what is said to be one of the most spectacular countries, and one of the most sparsely populated, in this quadrant of the world. A taster will appear here on our return. Running a ....

367 - Ajax
We thrive on taking note of upcoming technologies - newly opening niches. Sometimes, as with Perl some 10 years ago and with PHP more recently, it becomes a "no-brainer" that we should be getting more heavily involved and - if we like the technology - offering related services and courses. But for ....

366 - Error handling in Tcl through catch
Tcl is a truly interpretive language - and that means that you can get a syntax error if a user makes an illegal entry ... even in the middle of a program running. For example puts -nonewline "please enter a number: " flush stdout gets stdin value set doubled [expr $value * 2] puts "Result is $do ....

365 - Letterbox Pictures
There's a convention that pictures are pushed using a 4:3 or 3:4 aspect ratio and those are known as landscape and portrait formats ... but I've taken a few pictures over the last few days that seem to lend themselves naturally to the 2:1 ratio You might almost call this a "superlandscape" view o ....

364 - pu daily and p hourly
Tcl is a command based language - everything you do uses a command that starts with a command word such as puts to output information or set to assign a value to a variable. The while command (yes, it really is a command) lets you define a block of code that's to be run repeatedly while a conditio ....

363 - Greetings from Edinburgh
I slept in this morning ... woke at 06:30 and - yikes - had two hours of work to do before training, so "The Mouth" is shorter and later in the day. And, yes, I'm fighting the Edinburgh traffic each morning from shore where I'm staying to mountain top where I'm working. ....

362 - The ireallyreallywanna operator
In Tcl, any character (yes - any character) can appear in a variable name, though making use of variable names that contain - for example - spaces adds a needless complexity to your coding. Groups of special characters can be protected from the Tcl interpreter by wrapping them in curly braces, and i ....

361 - Binary Large Objects or bars
When designing a MySQL table, it's vital to choose the correct data type to hold your information. One such possible is a Blob - a binary large object - which can hold any byte stream that you like (choose the subtype based on maximum size). Ideal for data like images which you won't want to searc ....

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