onelson

Problem space: collections with varying items.

A contrived but valid bit of JSON data might look like:

[1, null, false, 2.0, "foo"]

Perhaps a more likely version of this problem is arrays of objects with varying fields:

onelson

/* automatically generated by rust-bindgen */

pub const _STDINT_H: u32 = 1;
pub const _FEATURES_H: u32 = 1;
pub const _DEFAULT_SOURCE: u32 = 1;
pub const __USE_ISOC11: u32 = 1;
pub const __USE_ISOC99: u32 = 1;
pub const __USE_ISOC95: u32 = 1;
pub const __USE_POSIX_IMPLICITLY: u32 = 1;
pub const _POSIX_SOURCE: u32 = 1;

onelson

These are some of the exact items I use.

Some of them are very specifically selected and I'll get into why, whereas others are just my preference and you could make whatever substitution you like.

https://www.amazon.com/registry/giftlist/1VRY39HN9O9GO/ref=cm_sw_r_cp_ep_ukn_.QVaCbAV0GZMQ

A notable omission from the list is a nice, comfortable pair of headphones. For my setup I use large-cup headphones with a standard 3.5mm jack.

onelson

I've been reading [Kubernetes Up and Running], and got excited when I saw that they include some instructions for configuring a cluster on Raspberry Pis, which I've been dying to play with for some time but never had a project to dig into.

I had been recording my progress in the form of a [twitter thread][thread], but I thought something easier to scan, and editable, might be a better way to record the outcomes and lessons learned.

As I started to dig in, I found the short guide to be different enough what I was seeing (in reality) that I decided to keep some notes about the tweaks I was required to make.

onelson

pub struct ChessGame {
    model: Chess,
}

#[derive(Clone)]
struct Chess(u8);

impl ChessGame {
    pub fn get(board_id: u8) -> ChessGame {
        

onelson

FROM ubuntu:16.04

RUN apt-get update && apt-get install -y \
    # stuff in case I need to debug/rebuild parts of the program
    cmake \
    build-essential \
    sudo \
    # runtime deps
    libglu1-mesa \
    libglew1.13 \

onelson

FROM ubuntu:16.04

RUN apt-get update && apt-get install -y \
    # stuff in case I need to debug/rebuild parts of the program
    cmake \
    build-essential \
    sudo \
    # runtime deps
    # TODO: either statically link these or wrap in a deb/rpm package to install these for the user
    libglu1-mesa \

onelson

object Change {
  def countChange(money: Int, coins: List[Int]): Int = {
    def loop(goal: Int, xs: List[Int]): Int = {
      if (goal == 0) 1
      else if (goal <= 0) 0
      else if (xs.isEmpty) 0
      else loop(goal, xs.tail) + loop(goal - xs.head, xs)
    }
    loop(money, coins)
  }

onelson

  def users(): Future[List[User]] = {
    val pl = Promise[List[User]]()
    Future {
      _roster.reloadAndWait()
      val entries = _roster.getEntries().asScala.toList
      val futures = entries map { entry =>
        val pu = Promise[User]()
        Future {  // wrap all this stuff in the future just so it doesn't block
          val target = entry.getUser()
          connection.sendIqWithResponseCallback(ProfileIQ(target), new StanzaListener() {

onelson

object Infuse {

  final case class InfuseResult(light: Int, marks: Int, steps: Seq[Int]) {
    def pretty: String = {
      s"Light: $light, Marks: $marks, Infusion: ${steps.mkString(" -> ")}"
    }
  }

  
  val COST = 3