banker

var customerAggregations = provider.AggregationSet<Customer>();


customerAggregations.Apply(x =>x.RecordShell.Age + 3,
    "AgeInThreeYears");

banker

    public static String script = "" +
            "local key = KEYS[1]" +
            "local field = ARGV[1]" +
            "local value = ARGV[2]" +
            "local op = ARGV[3]" +
            "local current = redis.call('hget', key, field)" +
            "if (current == null) then " +
            "    redis.call('hset', key, field, value)" +
            "elseif op == '>' then" +
            "  if tonumber(value) > tonumber(current) then" +

banker

Keybase proof

I hereby claim:

• I am banker on github.
• I am hwaet (https://keybase.io/hwaet) on keybase.
• I have a public key ASAz4KeG_T7Aeq6EJ727hEqaMlBSGzGBzx1iwJEONZLoQwo

To claim this, I am signing this object:

banker

x = 10000.times.to_a

a,b,c = x.dup, x.dup, x.dup

Benchmark.measure { 1000.times { out = []; out += a; out += b; out +=c; out.uniq! } }

Benchmark.measure { 1000.times { out = Set.new; out += a; out += b; out +=c; } }

Benchmark.measure { 1000.times { out = {}; a.each {|e| out[e] ||= 1}; b.each {|e| out[e] ||= 1}; c.each {|e| out[e] ||= 1}; } }

banker

> db.f.save({u: 1, v: 2})
> db.f.save({u: 2, v: 2})
> db.f.save({u: 1, v: 5})
> db.f.save({u: 2, v: 10})
> m = function() { emit(this.u, this.v) }
function () {
    emit(this.u, this.v);
}
> r = function(k, vs) { r = 0; vs.forEach(function(v) { r += v; }); return r; }
function (k, vs) {

banker

#include <stdio.h>
#include "mongo.h"

int main() {
  mongo conn[1];
  int status = mongo_connect( conn, "127.0.0.1", 27017 );

  if( status != MONGO_OK ) {
      switch ( conn->err ) {
        case MONGO_CONN_SUCCESS:    printf( "connection succeeded\n" ); break;

banker

MongoDB Pointers for Rubyists

Kyle Banker

DC Ruby | September, 2011

THE RAILS

1. Is MongoDB a good choice for your Rails project?

banker

module Mongo
  class Collection

   def map_reduce(map, reduce, opts={})
      map    = BSON::Code.new(map) unless map.is_a?(BSON::Code)
      reduce = BSON::Code.new(reduce) unless reduce.is_a?(BSON::Code)
      raw    = opts.delete(:raw)

      hash = BSON::OrderedHash.new
      hash['mapreduce'] = self.name

banker

#include "mongo.h"
#include "bson.h"

int main() {
  bson query[1], empty[1];
  mongo conn[1];
  int res;
  mongo_cursor *cursor;

  mongo_replset_init(conn, "test-rs");

banker

#!/usr/bin/env ruby

require 'rubygems'
require 'bundler/setup'
require 'mongo'

@conn = Mongo::Connection.new
@db = @conn['supply_chain_development']

puts @db['properties'].find.to_a.size