colefichter

public class SimpleMapper<TDestination> where TDestination : class, new()
    {
        public SimpleMapper() { }

        public virtual List<TDestination> CreateFrom<TSource>(List<TSource> source) where TSource : class
        {
            return source.ConvertAll<TDestination>(x => CreateFrom<TSource>(x));
        }

        public virtual TDestination CreateFrom<TSource>(TSource source) where TSource : class

colefichter

-module(set).

% An insert-only, distributed set that functions as a CRDT. By not allowing removal of elements in the set, we can
% provide Strong Eventual Consistency without a quorum algorithm. Requests can be served by any server without
% waiting for acknowledgment. Replication conflicts are impossible because all operations are commutative, 
% associative, and idempotent.
% I think something like this should provide consistency even with up to N-1 failures. (Is this correct?)
% Note that this is very similar to the multi-master counter, except that the merge function is different.

-behaviour(gen_server).

colefichter

-module(mmc).

% A multi-master counter implemented as a CRDT. Each server holds an array of counters (implemented as a dict here...)
% and Strong Eventual Consistency is acheived by using commutive increments on each of the counters. The current
% value read at any server is the sum of all the counter values (again, one per server) stored on that machine.
% As updates are synced between servers, all servers will eventually converge on a counter sum value with no
% conflicts possible. Also note that this does not use any consensus algorithm, so it remains fast as the number of
% servers scales. See http://research.microsoft.com/apps/video/default.aspx?id=153540&r=1

-behaviour(gen_server).

colefichter

% If you have a string that contains a numeric value, but you don't know if it is a float or an integer, then the
% standard conversion functions list_to_integer/1 and list_to_float/1 are a pain.
% Using these functions is easier, since they check the types and convert correctly for you:

numeric_to_list(X) when is_float(X) -> float_to_list(X, [{decimals, 9}, compact]);
numeric_to_list(X) when is_integer(X) -> integer_to_list(X).

list_to_numeric(L) when is_list(L) ->
    Float = (catch erlang:list_to_float(L)),
    Int = (catch erlang:list_to_integer(L)),

colefichter

%%%-------------------------------------------------------------------
%%% @author  Cole Fichter, www.colefichter.ca
%%% @copyright (C) 2014, 
%%% @doc
%%%     This module implements a round-robin priority queue with a client API similar to the standard Erlang queue.
%%%     Items are added to the queue with a key (an integer, usually some kind of id). When requested to dequeue an
%%%     item, the queue first picks a sub-queue by the key, then dequeues the first item under that key. The 'last key'
%%%     is incremented, and the next dequeued item will come from the sub-queue for the updated key.
%%%
%%%     Example use-case: preventing starvation while crawling multiple web sites. Suppose we're crawling three 

colefichter

hash(Data) when is_atom(Data) -> hash(atom_to_list(Data));
hash(Data) ->
    Binary160 = crypto:hash(sha, Data),
    hexstring(Binary160).

% Convert a 160-bit binary hash to a hex string.
hexstring(<<X:160/big-unsigned-integer>>) ->
    lists:flatten(io_lib:format("~40.16.0b", [X])).

colefichter

-module(ring).
% A simple process ring made up of a doubly-linked ring of processes.
% A message can be passed in either direction around the ring.
%
% Example usage in the Erlang shell:
%  > c(ring).
%  > First = ring:start(5).
%  > ring:send_anti_cw("Hi", First, 10).
%  > {relay,anti_clockwise,10,1,"Hi"}
%  > <0.38.0> Relaying 1 "Hi"

colefichter

-module(kv).

-export([start/0, stop/0, store/1, lookup/1, delete/1]).

-export([server_loop/1]).

%---------------------------------------------------------------------------------------------
% Client API
%---------------------------------------------------------------------------------------------

colefichter

{
	"cmd": ["./rebar compile eunit"],
    "shell": true,
	"working_dir": "${file_path}/../"
}

colefichter

<html>
<head>
    <title>Diffie-Hellman Key Exchange</title>
    <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
    <style>
        .secret {
            background-color: #ffa9a9;
        }
        th {
            background-color: lightgray;