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Training, Open Source Programming Languages This is page http://www.wellho.net/mouth/2291_Col ... -Ruby.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 Our training notes are now very much out of date, but due to upward compatability most of our examples remain operational and even relevant ad you are welcome to make us if them "as seen" and at your own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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Collection objects (array and hash) in Ruby
Ruby has two collection objects - Arrays (where you access elements based on their numeric position) and hashes (where you can access elements based on a key, rarely numeric). That's similar in all but name to many other languages, although the names may be different (arrays or lists; hashes or dictionaries or associative arrays!). We covered many of the basics on yesterday's learning to program in Ruby course - and here are the sample programs I wrote as an illustration during the Arrays and Hashes section: [link] Arrays, and iterating through them [link] Array methods such as grep [link] Simulated table (an array of arrays) [link] Set up a hash and use it [link] Simple but practical hash example [link] Count the number of visits from each IP address (Includes how to sort a hash - or rather the keys - based on the values the hash contains in Ruby) (written 2009-07-16) Associated topics are indexed as below, or enter http://melksh.am/nnnn for individual articles R107 - Collections (Arrays and Hashes) in Ruby[991] Adding a member to a Hash in Ruby - (2006-12-16) [2606] Sorting arrays and hashes in Ruby - (2010-01-30) [2618] What are Ruby Symbols? - (2010-02-02) [2621] Ruby collections and strings - some new examples - (2010-02-03) [2976] Creating, extending, traversing and combining Ruby arrays - (2010-09-30) [3253] Is this number between? Does this list include? - Ruby - (2011-04-18) [3255] Process every member of an array, and sort an array - Ruby - (2011-04-21) [3257] All possible combinations from a list (Python) or array (Ruby) - (2011-04-23) [3435] Sorta sorting a hash, and what if an exception is NOT thrown - Ruby - (2011-09-12) [3757] Ruby - a teaching example showing many of the language features in short but useful program - (2012-06-09) [4368] Shuffling a list - Ruby and Python - (2014-12-28) [4499] Significant work - beyond helloworld in Ruby - (2015-05-27) [4502] Reading and parsing a JSON object in Ruby - (2015-06-01)
Some other Articles
The dog is not in troubleCan you learn to program in 4 days? Regular Expressions in Ruby Object Orientation in Ruby - intermediate examples Collection objects (array and hash) in Ruby Opening and reading files - the ruby fundamentals pre-Inaugural briefing - Melksham Community Area Partnership Wiltshire Community Area Partnerships Learning to program in Ruby - examples of the programming basics New to programming? It is natural (but needless) for you to be nervous |
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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