Lua gets the file length and determines whether the file has a function

Source: Internet
Author: User
Tags assert lua

This article mainly introduces LUA to get file length and determine whether the file exists function sharing, need friends can refer to the following

Get file length

The code is as follows:

function length_of_file (filename)

Local FH = assert ( (filename, "RB"))

Local len = assert (Fh:seek ("End"))

Fh:close ()

Return len


To determine whether a file exists

The code is as follows:

function file_exists (path)

Local file = (path, "RB")

If file then File:close () end

Return file ~= Nil


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