christophevg

Keybase proof

I hereby claim:

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

To claim this, I am signing this object:

christophevg

// 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

christophevg

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

christophevg

Keybase proof

I hereby claim:

• I am ChristopheVG on github.
• I am christophevg (https://keybase.io/christophevg) on keybase.
• I have a public key whose fingerprint is F5EC FEB6 A1B8 0CB6 CFA7 FDE7 897E 3E40 AABF 2ECC

To claim this, I am signing this object:

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

christophevg

#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

christophevg

# 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

christophevg

// 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