ashrithr

Introduction to Kafka

Kafka acts as a kind of write-ahead log (WAL) that records messages to a persistent store (disk) and allows subscribers to read and apply these changes to their own stores in a system appropriate time-frame.

Terminology:

• Producers send messages to brokers
• Consumers read messages from brokers
• Messages are sent to a topic

kachayev

Channels Are Not Enough

... or Why Pipelining Is Not That Easy

Golang Concurrency Patterns for brave and smart.

By @kachayev

Intro

louismullie

import random as r
import math as m

# Number of darts that land inside.
inside = 0
# Total number of darts to throw.
total = 1000

# Iterate for the number of darts.
for i in range(0, total):

wch

if (!require(quantmod)) {
  stop("This app requires the quantmod package. To install it, run 'install.packages(\"quantmod\")'.\n")
}

# Download data for a stock if needed, and return the data
require_symbol <- function(symbol, envir = parent.frame()) {
  if (is.null(envir[[symbol]])) {
    envir[[symbol]] <- getSymbols(symbol, auto.assign = FALSE)
  }