Pure Lua under MAC (ii)

LUA Library

Basic functions

ASSERT (V,[,message])

When V is false, a message is returned

ASSERT (Money >0, "error-1001");

CollectGarbage ([Opt,[arg]]);//garbage collection related

Collet Stop Restart count step setpause Setstepmul

View memory is CollectGarbage ("count");

Error (Message,[,level]);

Error ("This operations is invalid");

_g global variables contain all of the global variables and functions

Getfenv ([f]) The current environment used by the current function f can be a function or a number

Getmetable (object) The current object has an associated metatable

Ipairs (t) output continuous array format

Load (Func[,chunkname]))???

LoadString (String, "Chunkname")???

Next (table, "index")

T = {"One", "Deux", "Drei", "Quarto"};

Print (Next (t,3));//Prints out key value//t[3] only prints out value

Pairs (t) Traversal object

Pcall (f,arg1,...) function protection situation Call

Rawget (table,index) equals table "index"

Rawset (Table,index,value) equals table[index] = value;

Select (Index,...) //???

Setfenv (f,table)//Setting the environment of the function

Setmetatable (table,metatable);

Tonumber (), ToString () type conversion

Type () view type//nil,number,string,boolean,table,thread,userdata

Unpack (List,[i,[j]]);//

MYT = {1,2,3,4,5,5,6,7,78,8,8,9};
Print (Unpack (myt,3,8))

System Library

Common libraries have table string math file os

Table functions

Table.concat (atable,start,end);//The value of the printed table

Table.insert (Atable,pos,value)

Table.remove (Atable,pos);

Table.sort (Atable,compare)//The second parameter is called after each comparison

OS functions

Os.clock ();//clock interval, CPU interval for executing instructions

Os.date ();//Date

Os.difftime ()//Time difference

Os.remove (filename);//removing files

Os.rename (oldname,newname);//Modify file name

Os.time ()//Time

Os.tmpname ();//Random name

Common Uses of table

As an array

As a hash table (Key,value)

. And: The difference

The colon includes itself.

Pure Lua under MAC (ii)