Christophe VG christophevg

State Machines for Dries

Three implementations:

demo_switch.c most basic, switch-based state machine
demo_functions.c a little nicer on the eye with functions as state handlers
demo_functions_results.c a more generic state machine framework with reconfigurable state transitions

Normal operation

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This Gist is a combination a many different solutions found around the net. It shows how to create two TreeViews and visually connect two nodes in each of them.

Most "problems" are covered:

Invisible nodes (e.g. when collapsed or scrolled out of sight)
Back- and forth notifications of updates between TreeViews and parent Form
Two LinkedTreeViews are combined in LinkedTreeViews Panel
Drag and Drop support allows to create/remove links

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I hereby claim:

I am christophevg on github.
I am christophevg (https://keybase.io/christophevg) on keybase.
I have a public key ASAchSq6OMeHwqCkToGzHbZq1CQFLsNJDZxCg0p1hGMFhgo

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	// Part 1.
	// Implement a function prototype extension that caches function results for
	// the same input arguments of a function with one parameter.
	//
	// For example:
	// Make sin(1) have the result of Math.sin(1), but use a cached value
	// for future calls.

	Function.prototype.withCaching = function withCaching() {
	if( ! this.cache ) { this.cache = {}; } // lazy initialization of cache

	# Illustration of Python generators

	def count_down(size):
	print "starting generation"
	while size > 1:
	print "yielding"
	yield size
	size -= 1
	print "finishing generation"
	yield size

	#include <stdio.h> // for printf

	#define START 123 // initial number to use to start sequence
	#define MAX 5 // maximum number of items in the list

	int main(void) {
	// create list on the stack
	int lst[MAX];

	// fill list

	// Courtesy http://www.instructables.com/id/How-to-Use-an-RGB-LED/?ALLSTEPS
	// function to convert a color to its Red, Green, and Blue components.

	void hueToRGB(uint8_t hue, uint8_t brightness, bool invert) {
	uint16_t scaledHue = (hue * 6);
	uint8_t segment = scaledHue / 256; // segment 0 to 5 around the
	// color wheel
	uint16_t segmentOffset =
	scaledHue - (segment * 256); // position within the segment