Alan Ball voronoipotato

This information applies to the PICO-8 0.1.6 release.

This document is here to help folks with a proficiency in Lua understand the limitations and discrepencies between Lua and PICO-8's Lua.

You can always view the manual or yellowafterlife's extended 0.1.1 manual.

General

anything written in uppercase the PICO-8 editor or .p8 is made lowercase by the editor. → editing the .p8 file directly can work
print(function() end) outputs the string function instead of the string function: 0x0000000.

Latency numbers every programmer should know

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns
L2 cache reference ........................... 7 ns
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns             
Compress 1K bytes with Zippy ............. 3,000 ns  =   3 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns  =  20 µs
SSD random read ........................ 150,000 ns  = 150 µs

Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs

	-- http://blog.jooq.org/2013/11/19/how-to-create-a-range-from-1-to-10-in-sql/

	IF EXISTS (SELECT *
	FROM dbo.sysobjects
	WHERE id = object_id (N'[dbo].[generate_series]')
	AND OBJECTPROPERTY(id, N'IsTableFunction') = 1)
	DROP FUNCTION [dbo].[generate_series]
	GO

	CREATE FUNCTION [dbo].[generate_series] ( @p_start INT, @p_end INT)

	$images = 'https://foo.jpg', 'https://bar.jpg'
	$targetDir = 'C:\foo\bar'

	function DownloadFile([Object[]] $sourceFiles,[string]$targetDirectory) {
	$wc = New-Object System.Net.WebClient

	foreach ($sourceFile in $sourceFiles){
	$sourceFileName = $sourceFile.SubString($sourceFile.LastIndexOf('/')+1)
	$targetFileName = $targetDirectory + $sourceFileName
	$wc.DownloadFile($sourceFile, $targetFileName)

	// SRTP: Statically Resolved Type Parameters
	// https://docs.microsoft.com/en-us/dotnet/fsharp/language-reference/generics/statically-resolved-type-parameters

	// SRTP Allows for pulling members out of types that where the member is named and typed the same
	// In this example SRTP will be used to pull out the 'First: string' and 'Last: string' members
	// from different types

	// One example of SRTP in the F# Base Class Library is the (+) operator.
	// You'll see that it has this type signature: