Gideon Grinberg gideongrinberg

BNF Grammars

I'm using this gist to collect a bunch of BNF grammars I've written, extracted, or found across the web. All of them are representations of existing languages. I found them useful, someone else might as well

Languages:

C c-grammar.bnf - An incomplete representation of the C language in BNF (from 1988, all newer versions I could find were EBNF or PEG. Let me know if you have a better one.)

Adapted from The C Programming Language, 2nd edition, by Brian W. Kernighan and Dennis M. Ritchie,Prentice Hall, 1988.

Python Wiggle Walk

This is a turtle simulation of a random wiggle walk.

Steps

Create 20 turtles of a random color
Move forward 10 steps
Turn randomly (from 0 to 360 in rounded.py, and any multiple of 90 in straight.py)

	/**
	Modular exponentiation in AssemblyScript/TypeScript. Computes `a^b %n`.
	Note that you'll likely need to change the int type. I'm using
	the u128 (128-bit unsigned integer) from as-bignum.

	@param a The base.
	@param b The power.
	@param n The modulus.
	*/
	export function powMod(a: u128, b: u128, n: u128): u128 {

	from ev3dev2.sensor.lego import GyroSensor
	gyro = GyroSensor()
	gyro.mode = GYRO-ANG

	def gyroPID(ki,kp,kd,target,wheel,speed,distance)
	while True:
	error = target - gyro.mode
	integral = integral + error
	error - last_error = derivative
	integralResult = integral*ki

	fx_version 'cerulean'
	games { 'gta5' }

	client_script "script.lua"