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2361 - Geocoding - converting address to latitude / Longitude with PHP via Google
We have a 'geocoding' example here, and indeed I was using it earlier today. The idea is that someone enters part of an address on your web site, and you contact Google to look up the latitude and longitude so that you can put it on a map, or calculate a distance from somewhere else. It's very ne ....

2360 - Error Handling in Lua with assert and pcall
When a function fails in lua, you'll often find that it return a nil value that you can check, or it returns two values, the second of which is an error status / message that tells you what went wrong. Here's an example: value = tonumber(stuff) if value == nil then    print ("Nah!") ....

2359 - A fresh example - objects the Lua way
One of the requirements we often have in our web server log file analyses is to connect together a series of accesses from a single IP address into a "visit", and this formed an example on Tuesday's Lua course. In Lua, you can overload (i.e. redefine) operators so that they work differently on tabl ....

2358 - Encapsulating shared code in a Lua module
Have you ever written code like this? seps = {" "," "," [",'] "','" '," ",' "','" "','"'} Yes, I have ... in fact, that's code that I wrote on Tuesday during the Lua course; it's an indexed table of the separators used to split down a web access log record that's in the apache httpd combined forma ....

2357 - Checking if the user has entered a number (Lua)
In Lua, there's a difference between 0 and nil - and that means that you can easily code to ask your user to enter a number, testing the result and allowing him to enter zero as a legitimate value. That may sound like it's no big deal, but you don't want a loop to exit on a premature 0. Here's co ....

2356 - Passing multiple results back from a function - Lua, Python, etc
Have you ever wondered why you can pass in as many parameters as you like to a function, but only return one? It seems rather unfair, doesn't it - especially as you may have lots of results. In fact, in some languages such as Lua you can pass multiple values back:   a,b,c = symie(4,7,9) ....

2355 - See this page in French
Would you like to read this page in French? If so you can do so here ... through Google's "Translate" service ... and this is just an example - I can write other links for other languages, or you can move on from French to another language once you've gone to Google. The extra tag in my page is: ....

2354 - Training, Open Source computer languages
A few days ago, I made a series of postings which summarised our courses in major western European languages - with a view to having the information about our courses available / findable to people who's mother tongue is perhaps Swedish or Italian, but who have good English and could benefit from ou ....

2353 - All change - Wiltshire Parliamentary
At the weekend, I read that James Gray, the MP for Chippenham, had remarried. And, yesterday, that Michael Ancram, MP for Devizes (which includes Melksham) has taken the decision to stand down at the next general election. Goodness - how times change; four years ago, when I first got more actively ....

2352 - Printed Directories - the start of the updating season
I don't know how many business directories there are - but I do know it's the season for all the directory providers to start phoning around and sell spaces in their publications. I have spoken with two in the last two days! So it's very fortunate that Lisa and I spent Saturday going through the ....

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