rtoal

show dbs

use hello

db.people.insert({name: "Abdul", age: 22, likes: ["skiing", "hiking"]})

db.people.insert({name: "Barbara", age: 20, country: "UK"})

db.people.insert({name: "Chi", age: 40, country: "CN", 
    job: {title: "welder", salary: {currency: "EUR", amount: 50000}}})

rtoal

# Mongo not happy unless lots of open files
ulimit -n 2000

# Start server
sudo mongod --fork --syslog

# Already done
unzip all-films.zip
mongoimport -d mgo -c films all-films.json

rtoal

mkdir -p data/shard0/rs0 data/shard0/rs1 data/shard0/rs2
mongod --replSet s0 --logpath "s0-r0.log" --dbpath data/shard0/rs0 --port 37017 --fork --shardsvr
mongod --replSet s0 --logpath "s0-r1.log" --dbpath data/shard0/rs1 --port 37018 --fork --shardsvr
mongod --replSet s0 --logpath "s0-r2.log" --dbpath data/shard0/rs2 --port 37019 --fork --shardsvr
 
mongo --port 37017
config = {_id: "s0", members: [
  {_id: 0, host: "localhost:37017" },
  {_id: 1, host: "localhost:37018" },
  {_id: 2, host: "localhost:37019" }]};

rtoal

# Writes the class hierarchy of the core Ruby classes.

$nodes = Hash.new

module Hack # Hack to keep Node out of the result!
  class Node
    attr_reader :cls 
    attr_accessor :children
    def initialize(c)
      @cls = c

rtoal

BasicObject 
    Object (Kernel)
        Module 
            Class 
        NilClass 
        Data 
        TrueClass 
        FalseClass 
        Encoding 
        String (Comparable)

rtoal

class Circle
  attr_reader :r
  
  def initialize(x = 0, y = 0, r = 1)
    @x = x
    @y = y
    @r = r
  end
  
  def center

rtoal

class Animal
  def initialize(name)
    @name = name
  end
  def speak()
    "#{@name} says #{sound()}"
  end
end

class Cow < Animal

rtoal

import re
import sys
pattern = re.compile(r'"[\w]+":')

all = set([])
for line in sys.stdin:
    keys = re.findall(pattern, line)
    all.update(keys)
print all

rtoal

/*
 * bypass.c
 *
 * Try this on an x86 machine.  It does **not** print "1".
 */

#include <stdio.h>

void weird() {
  int a;

rtoal

next((i for i,row in enumerate(a) if all(x == 0 for x in row)), -1)