X File

From GiderosMobile
Revision as of 15:32, 13 July 2023 by Hgy29 (talk | contribs) (Text replacement - "<source" to "<syntaxhighlight")

Supported platforms: Platform android.pngPlatform ios.pngPlatform mac.pngPlatform pc.pngPlatform html5.pngPlatform winrt.pngPlatform win32.png
Available since: Gideros 2011.6

Description

A file object is usually returned by io.open used to manipulate (read and write) files in lua.

NOTE: this page and other related file methods use an X before the name because wiki forbids creating pages starting with file

Examples

<syntaxhighlight lang="lua"> --function to copy file local function copy(src, dst) local srcf = io.open(src, "rb") local dstf = io.open(dst, "wb")

local size = 2^13 -- good buffer size (8K) while true do local block = srcf:read(size) if not block then break end dstf:write(block) end srcf:close() dstf:close() end

--function to check if file exists local function exists(file) local f = io.open(file, "rb") if f == nil then return false end f:close() return true end

--usage if not exists("|D|database.db") then copy("database.db", "|D|database.db") end </source>

Methods

file:close closes file
file:flush saves any written data to file
file:lines returns an iterator function
file:read reads file according to given formats, returns read values or nil
file:seek sets file seek pos
file:write writes strings or numbers to file

Events

Constants