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Sorting in lua - specifying your own sort routine
In Lua, the table.sort function allows you to sort a table and by default is sorts into the order that's given back by the < operator on each of the objects to be sorted. If you want to override this behaviour, you can pass the name of a function into Lua's sort and it will call this function each time a comparison is needed. In order to help demonstrate this, I wrote a sample program with my own sort routine which I called "mysort" - as a direct replacement for table.sort with two parameters - table and function. You can see the source code here. (written 2008-07-05) Associated topics are indexed as below, or enter http://melksh.am/nnnn for individual articles U105 - Lua - Tables and the table library.[3725] Lua Tables - (2012-05-10) [3694] Special __ methods you can use in Lua metatables - (2012-04-12) [2703] Lua Metatables - (2010-04-02) [2699] Lua tables - they are everything - (2010-03-30) [2499] ourdog is Greyhound, Staffie and Ginger Cake - (2009-11-09) [2346] The indexed and hashed parts of a Lua table - (2009-08-10) [1742] Lua - Table elements v table as a whole - (2008-08-07) U106 - Lua - Functions. [3695] Functions are first class variables in Lua and Python - (2012-04-13) [2949] Lua - variable function arguments and select - (2010-09-08) [2723] Returning multiple values from a function - Lua - (2010-04-15) [2455] Lua examples - coroutines, error handling, objects, etc - (2009-10-15) [2356] Passing multiple results back from a function - Lua, Python, etc - (2009-08-13) [2347] Dot, dot, dot in Lua - variable length parameter lists - (2009-08-11) [2312] What are closures in Lua? - (2009-07-31) [1847] Lua - IAQ (Infrequently Answered Questions) - (2008-10-18) [1744] Lua examples, Lua Courses - (2008-08-08) [1743] First class functions in Lua lead to powerful OO facilities - (2008-08-07) [1699] If you are learning Lua, here are some more examples - (2008-07-06) [1685] Short circuit evaluation (lazy operator) in Lua - (2008-06-22) 4f13
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