KevinWMatthews

class Prime
  include Enumerable

  def self.nth(index)
    raise ArgumentError, 'index out of bound' if index <= 0
    new.take(index).last
  end

  def each(&block)
    (2..Float::INFINITY).each do |i|

KevinWMatthews

def self.prime?(num)
  return num > 1 if num <= 3
  return false if (divisible?(num,2) || divisible?(num,3))

  # loop while (6*k-1)**2 <= num, or
  # k <= (1+sqrt(num)/6)
  max_k = (Math.sqrt(num)+1)/6.0
  return false if (1..max_k).any? {|k| divisible?(num,6*k+1) || divisible?(num,6*k-1)}
end

KevinWMatthews

# Get Sublime Text to use your rvm ruby without hardcoding a `$USER`.
#
# Include the configurations below the commend in the appropriate file listed below:
#
#  - OS X ST2: ~/Library/Application Support/Sublime Text 2/Packages/Ruby/Ruby.sublime-build 
#  - OS X ST3: ~/Library/Application Support/Sublime Text 3/Packages/User/Ruby.sublime-build
#  - Linux ST2: ~/.config/sublime-text-2/Packages/Ruby/Ruby.sublime-build
#  - Linux ST3: ~/.config/sublime-text-3/Packages/User/Ruby.sublime-build

{

KevinWMatthews

// Bird's-eye view of overall production code
Cmac_Calculate()
{
    aes_handle = Aes128_Create(key, iv)
    
    // Perform several technical operations (CmacOps) per the CMAC spec.
    CmacOps_GenerateSubkeys(aes_handle, *subkey1, *subkey2)
    //...
    CmacOps_ApplyCbcMac(aes_handle, <relevant_parameters>)
    //...

KevinWMatthews

// From production code
typedef struct AES_STRUCT * AES_HANDLE;

typedef struct
{
    char *key;
    size_t key_len;
    char *iv;
    size_t iv_len
} CREATE_PARAMS;

KevinWMatthews

# Get the exercise name from the current directory
get_filename_component(exercise ${CMAKE_CURRENT_SOURCE_DIR} NAME)

# Basic CMake project
cmake_minimum_required(VERSION 3.1.3)

# Name the project after the exercise
project(${exercise} CXX)

# Locate Boost libraries: unit_test_framework, date_time and regex

KevinWMatthews

// Example of non-lexical lifetimes for references in Rust
//
// References go out of scope at their last use,
// not at the end of a block.

fn main() {
    example1();
    example2();
    example3();
}

KevinWMatthews

# Docs:
# https://docs.python.org/3/library/functools.html#functools.reduce

import functools

# reduce(function, iterable)
# Applies function to each item of the sequence, left to right.
# Passes two arguments to the function:
# the current total
# the next item in the sequence

KevinWMatthews

// Uncomment /* */ blocks within functions to see compiler errors.

/*
Links to documentation

str, the string primitive:
https://doc.rust-lang.org/std/primitive.str.html

str, trait implementations:
https://doc.rust-lang.org/std/primitive.str.html#implementations

KevinWMatthews

const initialState = 'inactive';

const toggleMachine = Machine({
    id: 'toggle',
    initial: initialState,
    states: {
        inactive: { // 'inactive' state
            on: {   // "on event, transition to state..."
                TOGGLE: 'active'    // on event 'TOGGLE', transition to 'active'
            }