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Training, Open Source Programming Languages This is page http://www.wellho.net/mouth/2346_The ... table.html Our email: info@wellho.net • Phone: 01144 1225 708225 |
| For 2023 (and 2024 ...) - we are now fully retired from IT training. We have made many, many friends over 25 years of teaching about Python, Tcl, Perl, PHP, Lua, Java, C and C++ - and MySQL, Linux and Solaris/SunOS too. Our training notes are now very much out of date, but due to upward compatability most of our examples remain operational and even relevant ad you are welcome to make us if them "as seen" and at your own risk. Lisa and I (Graham) now live in what was our training centre in Melksham - happy to meet with former delegates here - but do check ahead before coming round. We are far from inactive - rather, enjoying the times that we are retired but still healthy enough in mind and body to be active! I am also active in many other area and still look after a lot of web sites - you can find an index ((here)) |
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The indexed and hashed parts of a Lua table
A Lua table contains both a sequentially indexed section and a hash keyed section (and a few other things too). When you sort the table, you sort only the index keyed section, when you use ipairs you use just the first (indexed) section, but when you use pairs you use the whole table. See source code example. Because of these two sections, a table is the only Lua native collection object (userdata is available via C), and it is used for Vectors, Lists, Tuples, Arrays, Stacks, queues, dictionaries, associative arrays, hashed and objects. After all, Lua has a tiny footprint at it's great to be able to use a single type in so many ways. We teach Programming in Lua at our Melksham Training Centre regularly, and can run on site courses in many countries to our standard agenda, or to an agenda tuned for your specific needs. (written 2009-08-10, updated 2009-08-12) Associated topics are indexed as below, or enter http://melksh.am/nnnn for individual articles U105 - Lua - Tables and the table library.[1697] Sorting in lua - specifying your own sort routine - (2008-07-05) [1742] Lua - Table elements v table as a whole - (2008-08-07) [2499] ourdog is Greyhound, Staffie and Ginger Cake - (2009-11-09) [2699] Lua tables - they are everything - (2010-03-30) [2703] Lua Metatables - (2010-04-02) [3694] Special __ methods you can use in Lua metatables - (2012-04-12) [3725] Lua Tables - (2012-05-10) [4248] Metatables, Metamethods, classes and objects in Lua - (2014-03-18) [4273] Dot or Colon separator between table name and member in Lua - what is the difference? - (2014-05-06) [4571] Lua - using modules to add your own utilities - (2015-11-04)
Some other Articles
Ten years in Melksham - looking forward to ten more.Businesses effected by road works in Melksham Finding literals rather than patterns in Lua Dot, dot, dot in Lua - variable length parameter lists The indexed and hashed parts of a Lua table Automatically initialising Lua variables the first time Reading a data file and sensing EOF in Lua World Flags in your PHP pages Training Classes in other tongues Koulutus, Open Source tietokone kielill[83][c2]ä |
4759 posts, page by page
Link to page ... 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96 at 50 posts per pageThis 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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