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4277 - Sending a message to the server and changing text on a page when a button is pressed
Scenario ... * I wish to provide a button on my page that signals when it's pressed back to the server * I wish the server to log the button press (a vote, perhaps) but not refresh the page * I wish to change the text on the page to give visual feedback that the button has been pressed Easy enoug ....

4276 - Swindon to Weymouth - by train, the traditional way - 2014
The traditional day out by train from Swindon to Weymouth is once again available on Sundays from 18th May until early September. The train leaves Swindon at 09:26 (09:21 on some dates), and passengers get to Weymouth at 11:54. Returning from Weymouth at 17:56, passengers will be back in Swindon a ....

4275 - Eurpoean Elections, and other elections ahead. Some thoughts on campaigns and policies
We're coming up to elections for the European Parliament, though looking up the streets you won't see (m)any election postsers. And looking a year ahead, there's a general election to happen with parties already tussling for position. Talk on the radio yesterday was of how civil servants in some de ....

4274 - String formatting in Lua - string.format as a wrapper for sprintf
Lua is a small language - and so for some elements of its functionallity it uses wrappers around underlying C functions rather than re-implementing and duplicating logic. A good example is the string.format function which in essence is a wrapper around sprintf. For example:   thing = st ....

4273 - Dot or Colon separator between table name and member in Lua - what is the difference?
When do I use a dot and when do I use a colon in referencing a table member in Lua? It's a good question and one that we answer (and demonstrate to help make clear) on our Lua Programming Course. Dot refers to a table member. So if I write   source.read() I am saying "run the read func ....

4272 - Lazy operators in Lua - what they mean, and examples
If you use the word or in an expression in Lua, the expression to the right of the word will only be evaluated and returned of the value to the left is nil. So a very common idiom is:   stuff = stuff or {} which means "if stuff already has a value, leave it alone - otherwise make it an em ....

4271 - Line, block and nested comments - Lua compared to other languages
You can comment your Lua program in two ways. a) using comments that start -- , in which case they run to the end of the line - so that's a line comment b) starting --[[ , in which case they run through to the next ]] which may be in the same line, or a number of lines later - so that's a block co ....

4270 - Embedding Lua to perform tailored code at an interval
Lua is a language that's commonly embedded within other products - a game, or a control system, for example - in order to provide a programmable tailoring of that other product. It's a great language for that - it's small, it's free, it has a suitable open source license, and it comes as a C libra ....

4269 - Survey - Journeys
Although our survey's main intent was to see how we had reached people, we added some "early use" questions to help us understand people's journeys - which ones had been "sold" and which not, if you like. However, we can't easily differentiate between high numbers due to good marketing and high numb ....

4268 - Metrics - historic and current TransWilts train use
An interesting series of three questions from the survey looking at previous and current use of the TransWilts servive and train services in general     The questions were intentionally worded to let people give us their own view of frequency - whether they consider themselves to be r ....

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