OleksiyRudenko

Why should text files end with a newline?

Reasons:

• UNIX standard
• If the last line in a file doesn't end with a newline then addition of next line affects two lines instead of one. This also pollutes diff on multiple files, so reader may wonder what has changed in a line whereas no significant change has occured.

Multiple newlines at the file end are also redundant as well as spaces at the end of line.

sahilsk

Lets say i want to rebalance my-sample-topic topic on my kafka cluster

Create topcis.json

{
  "version": 1,
  "topics": [
 { "topic": "my-sample-topic" 

olafurpg

// Works for scalafmt 0.5.5
// From https://gist.github.com/hseeberger/03677ef75bfadb7663c3b41bb58c702b
// Thank you @hseeberger!

import org.scalafmt.bootstrap.ScalafmtBootstrap
import org.scalafmt.sbt.ScalafmtPlugin
import sbt._
import sbt.Keys._
import sbt.inc.Analysis

ursuad

Kafka Topics

List existing topics

bin/kafka-topics.sh --zookeeper localhost:2181 --list

Describe a topic

bin/kafka-topics.sh --zookeeper localhost:2181 --describe --topic mytopic

Purge a topic

bin/kafka-topics.sh --zookeeper localhost:2181 --alter --topic mytopic --config retention.ms=1000

... wait a minute ...

manjuraj

//
// Disjunction - aka Scalaz Either
// \/[A, B] is an alternative to Either[A, B]
// -\/ is Left  (usually represents failure by convention)
// \/- is Right (usually represents success by convention)
// Left or Right - which side of the Disjunction does the "-" appear?
//
// Prefer infix notation to express Disjunction Type v: String \/ Double
//
// References

Yiabiten

( ͡° ͜ʖ ͡°)

Hello. If you see this, Enjoy !

The right tools

• Introducing Clover: Chrome tabs for Win Explorer.

• Force uninstall (when control panel unistall button is absent):

> wmic product where caption="Google chrome 14.3" call uninstall

jsuereth

Here's a short little guide to sbt's build structure.

First off, the key you need to investigate how sbt is building things. Here's a snippet from a build.sbt:

import sbt.Keys._
val bs: sbt.BuildStructure = buildStructure.value

This will give you all the gory details of our build (or builds, as is the case).

viktorklang

import scala.concurrent.duration._
import scala.concurrent.ExecutionContext
import scala.concurrent.Future
import akka.pattern.after
import akka.actor.Scheduler

/**
 * Given an operation that produces a T, returns a Future containing the result of T, unless an exception is thrown,
 * in which case the operation will be retried after _delay_ time, if there are more possible retries, which is configured through
 * the _retries_ parameter. If the operation does not succeed and there is no retries left, the resulting Future will contain the last failure.