Sample Code

wiki

Lua 5.x

• Lua samples
  • AccessHiddenTables - Access hidden tables using metatables (functions)
  • AsciiMenu - console-based menu system, illustrating menu definition via chain of '.' calls (design pattern)
  • BaseSixtyFour - Base64 encode/decode (functions)
  • BinaryInsert - inserts a value into a sorted array via a binary search algorithm (function)
  • BinarySearch - searches for a value in a sorted array via a binary search algorithm (function)
  • ClassesAndMethodsExample - a simple class implementation with inheritance (module)
  • CommandLineModule - command line parsing
  • ComparisonByValue - make a table compare its keys by value rather than by reference
  • CompleteWithReadline - completion engine for standalone interpreter (functions)
  • ComplexNumbers - simple attempt to handle complex numbers (functions)
  • CopyTable - return deep copy of table (function)
  • CopasExample - TCP socket server utilizing Copas library (examples)
  • CoroutinesAsConnectionHandlers - scaffolding for handling multiple sockets using coroutines (design pattern)
  • CoroutinesAsEventHandlers - scaffolding for handling event responders (design pattern)
  • CppStreamChunkReader - lua_load chunk reader for any C++ std::istream (function)
  • CppMetaprogramming - C++ metaprogramming using Lua (design pattern, library)
  • DataDumper - dumps nearly any data into a Lua chunk string (function)
  • DateFormattingFunctions - format date into various date string format (functions)
  • DayOfWeekAndDaysInMonthExample - calculate number of days in month or day of week in calendar day (functions)
  • DisplayCalendarInHtml - creates calendar in HTML (function)
  • DirTreeIterator - iterator function for recursive file/directory traversal (function)
  • ExtensionProposal - extended os and io API (modules)
  • FileInputOutput - input/output file utility functions (functions)
  • FileGlob - matching filenames with glob expressions (function)
  • FiniteStateMachine - finite state machine (FSMs) (design pattern)
  • FormattingNumbers - format numbers in monetary format (function)
  • FuncTables - memoization of functions using callable tables (design pattern, code, and tutorial) (editor note: possibly move)
  • FunctionalTuples - implementing tuples in terms functions (design pattern and tutorial) (editor note: possibly move)
  • FunWithCoroutines - tricks using coroutines: reverse string and control inversion (design patterns)
  • FunWithTables - example that shows the expressive power of Lua's tables
  • GdThumbnail - thumbnailer using lua-gd (e.g. for web galleries or similar)
  • GeneralizedPairsAndIpairs - next, pairs, and ipairs reimplemented to call metamethods (design pattern and functions)
  • GettingTheTitleFromHtmlFiles - parse title tag from HTML files (command-line program)
  • HammingNumbers - enumerate hamming numbers (function)
  • HammingNumbersVariant - enumerate hamming numbers, with lazy list (function)
  • HashedModulesLoader - a module loader that verifies the module cryptographic hash prior to loading
  • HexDump - dump a string in typical 'hex dump' format
  • InterpolatingSearch - searches for a value in a sorted array via an interpolating search algorithm (function)
  • LazySort - sort only as much of a table as is necessary (function and tutorial)
  • LpegRecipes - examples of using LPeg for parsing (examples)
  • LuaCarp - ensures error function is passed correct level, like Perl Carp (module)
  • LuaClassesWithMetatable - creating classes via metatables (tutorial and code) (editor note: possibly move)
  • LuaCompilerInLua - luac compiler implemented in Lua (program)
  • LuaModulesLoader - a Lua implementation of the standard Lua module loader
  • LuaPrintf - emulation of printf string formatting (function)
  • LuaProjectListToXml - read list of Lua projects from Lua website and output as XML (program)
  • LuaRecipes - useful code snippets and functions (design patterns)
  • LuaSorting - a sample shellsort implementation in pure Lua (function)
  • LuaToHtml - convert (htmlize) Lua source to HTML (command-line program)
  • LuaTypeChecking - implementing type checking in Lua (design patterns and code)
  • LuaUnit - LuaUnit unit testing framework (module)
  • LuaXml - handling XML with various libraries (sample code)
  • LxpTree - constructs an XML tree from a string/file using LazyKit (example code)
  • MakingLuaLikePhp - PHP-like functions implemented in Lua (functions)
  • MakingLuaLikeRuby - Simulating some of the semantics of Ruby in Lua (design pattern)
  • MultipleInheritanceClasses - A multiple-inheritance class system including shared (virtual) inheritance (module)
  • MutableFunctions - using functions to simulate the semantics of tables (design pattern)
  • NextMetamethodForIndexTable - next()-like function for iterating table against table __index (function and design pattern)
  • ObjectProperties - implementing object properties - obj.field (function and design pattern)
  • OrderedAssociativeTable - iterate over a table using a sorted index (function and design pattern)
  • OrderedTable - iterate over tables in the order of key insertion (function and design pattern)
  • OrderedTableSimple - iterate over tables in the order of key insertion (function and design pattern)
  • OutputLuaTableToHtmlFile - converts a Lua table into an HTML file (function)
  • PersistentTablesSqlite - persist Lua tables in SQLite database (sample code)
  • PickleTable - Lua table serialization (module)
  • ProfilerInLua - very simple Lua profiler (module)
  • ProxyBasedEncapsulation - encapsulation of objects via proxy tables (function/design pattern)
  • RandomSample - random permutation/combination via lazy table approach (design pattern)
  • RandomStrings - generate random strings from defined char sets (function)
  • ReadDefinedChunks - read delimited chunks from an file (function)
  • ReadOnlyTables - making a table read-only via metamethods (function and design pattern)
  • ReadWriteFormat - a way to pack / unpack integer values into a binary string (functions)
  • RecursiveDataTypes - handling recursive data types (design pattern and tutorial)
  • RecursiveReadOnlyTables - making a nested table read-only via metamethods (function and design pattern)
  • ResourceAcquisitionIsInitialization - automatically releasing acquired resources on scope exit, RAII (module,pattern)
  • SaveTableToFile - Save a table to file/string (functions)
  • SetOperations - test for set or list membership (design pattern)
  • SetVariablesAndTablesWithFunction - recursively build and set table fields with dot notation--e.g. "x.y.z" (function and design pattern)
  • SimpleFit - curve fitting (module)
  • SimpleLuaClasses - class declaration - a metatable approach (tutorial, design pattern, and function)
  • SimpleLuaPreprocessor - macro processor (function)
  • LuaMatrix - basic matrix functions (module)
  • SimpleRound - round number to n decimal places (functions)
  • SimpleStack - stack implemented via table (class)
  • SimpleStats - some simple statistics routes for tables.
  • SimpleTuples - immutable interned 2-tuples (module)
  • SlightlyLessSimpleLuaPreprocessor - macro processor (function/program)
  • SortedIteration - iterating a table in order by keys (function)
  • SortedIterationSimple - iterating a table in order by keys (function)
  • SplitJoin - Perl-like string split/join functions (functions)
  • StandardLibraries - os, io, getopt, string, regex, xml, list/set/table, object, and math modules (modules)
  • StringInterpolation - interpolating variables into strings in Lua (functions and design patterns)
  • StringRecipes - solutions to various common string manipulation needs (example code)
  • SwitchStatement - emulating a C-style switch statement in Lua (design pattern)
  • TextTemplate - macro processor (module)
  • TimeZone - obtaining portable timezone string in form +hhmm or -hhmm (function)
  • VarExpand - bash-style inline variable and code expansion
  • YetAnotherClassImplementation - a complex class implementation with inheritance (module)

• Lua C API samples
  • C
    • BindingWithMetatableAndClosures
    • BindingWithMembersAndMethods
    • EasyManualLibraryLoad - greatly simplifies manual loading (GetProcAddress or dlsym) of Lua 5.1 shared library (.dll or .so)
    • GettingValuesFromLua (4.x and 5.x)
    • LuaGenericCall - a single function to call Lua interpreter from C, exchanging nearly any type of data
    • LexicalAnalysis
    • SimpleLuaApiExample - simple intro to interfacing to Lua from C: C program loads/runs a Lua script file, sets Lua variables and retrieves return value (example)
    • StringReplace
    • UserDataExample
    • UserDataWithPointerExample
    • FileLineMacros - implements a simple __FILE__ and __LINE__ macro mechanism in the Lua parser. (Uses the internals of Lua, not the official Lua C API.)
    • ValidateUnicodeString - extends Lua to handle UTF-8 strings with new string.* methods.
  • C++
    • CallingLuaFromCpp
    • CppConvenientLuaWrapperClass
    • CppLuaDataPassing - passsing data between C++ and Lua
    • CppObjectBinding
    • DoItYourselfCppBinding
    • ExtractingWxClasses
    • SimplerCppBinding
• See also
  • LuaDesignPatterns for design patterns in Lua (design patterns)
  • LuaTutorial for usage examples of core Lua functions (examples)
  • LibrariesAndBindings for modules (modules)
  • LuaForge for programs and modules in Lua (modules, programs)

• Full Programs
  • LuaShell - an incomplete sample shell which understands Lua syntax

Lua 4.x

These should be upgraded to the latest Lua version.

• Lua samples
  • ClassesAndMethods
  • DebuggingAndTesting
  • GetOpt - command-line argument parsing getopt-style
  • ListDep - outputs a list of dependencies between Lua files (command-line program)
  • ListOperations - utility functions operating on lists, functional programming (functions)
  • LuaFunctors
  • MailBoxParsing
  • NamespacesAndModules - module/namespace handling in Lua 4 (design pattern) (Lua 4 specific)

• PersistentTables
• PhiLhoSoftLuaSamples
• PythonDictionaries
• PythonLists
• ShellAccess
• SimpleDebugger
• TextJustification
• TextProcessing
• VectorGlue

• Lua C API samples
  • C
    • VectorLibrarySample
  • C++
    • SimpleCppBinding

See also: OptimisationTips, OptimizedSampleCode