sumeet

const SAMPLE_FLAT_LIST: &str = "(a b c d e f)";
const SAMPLE_NESTED_LIST: &str = "(a b c (d (e word-word) f))";
const SAMPLE_WORD: &str = "sample-word";

#[derive(Debug)]
enum Expr {
    List(Vec<Expr>),
    Word(String),
}

sumeet

// SDL2 Hello, World!
// This should display a white screen for 2 seconds
// compile with: gcc -o hello_sdl2 -lSDL2 hello_sdl2.c
// run with: ./hello_sdl2
#include <SDL2/SDL.h>

#include <stdio.h>

#define SCREEN_WIDTH 640
#define SCREEN_HEIGHT 480

sumeet

Undo/Redo

Undo/Redo is one of those features of an application that you almost always need to have if you are building serious GUI tools for people to do work.

The best way to look at undo/redo is two stacks of operations the user has performed:

• The Undo stack is the "history" of what they've done
• The redo stack is the breadcrumbs back to the initial state before they started undoing

sumeet

struct Assignment {}
enum CodeNode {
    Assignment(Assignment),
}
enum CodeNodeRef<'a> {
    Assignment(&'a Assignment),
}
impl<'a> From<&'a Assignment> for CodeNodeRef<'a> {
    fn from(x: &'a Assignment) -> Self {
        CodeNodeRef::Assignment(x)

sumeet

#[derive(Debug)]
enum Bar { 
    A,
    B
}

impl Bar {
    fn as_ref(&self) -> Bar {
        match self {
            Bar::A => Bar::A,

sumeet

# turns the display on and off using an external switch plugged into GPIO


# see http://razzpisampler.oreilly.com/ch07.html for more info
import RPi.GPIO as GPIO
import time
import os


# -- blacklight --

sumeet

require 'redis'

class Entry
  attr_reader :log_number, :unix_timestamp, :microseconds, :command, :full_command
  def initialize(raw_data)
    @log_number = raw_data[0]
    @unix_timestamp = raw_data[1]
    @microseconds = raw_data[2]
    @full_command = raw_data[4].join(' ')
  end

sumeet

#!/usr/bin/env bash

# Source: https://gist.github.com/jordan-brough/48e2803c0ffa6dc2e0bd

# Download this script as "git-recent" (no extension), chmod it to be executable and put it in your
# path somewhere (e.g. /usr/bin). You can then use it via `git recent` from inside any git repo.

# Example:
#
# $ git recent -n 5