andrejacobs

#!/bin/bash
# Creates a timelapse video of today's photos
# Author: Andre Jacobs
# Overview: 
#   I am using a Raspberry Pi Zero W with the Camera V2 module to take timelapse photography
#   The idea came from:
#       https://blog.alexellis.io/raspberry-pi-timelapse/
#       https://github.com/alexellis/phototimer

# Today's timelapse directory (e.g. 2019/7/12)

dineshbhagat

apache-camel-kafka version >= 2.22

# consumer URL, should be in one line, for readability added new lines
kafka.url=kafka://
${kafka.topic}
?
brokers=${kafka.broker}&
&groupId=${kafka.groupId}
serializerClass=org.apache.kafka.common.serialization.StringSerializer&
keySerializerClass=org.apache.kafka.common.serialization.StringSerializer&

staaldraad

# Gawk version
# Remote
grep -v "rem_address" /proc/net/tcp  | awk  '{x=strtonum("0x"substr($3,index($3,":")-2,2)); for (i=5; i>0; i-=2) x = x"."strtonum("0x"substr($3,i,2))}{print x":"strtonum("0x"substr($3,index($3,":")+1,4))}'

# Local
grep -v "rem_address" /proc/net/tcp | awk  '{x=strtonum("0x"substr($2,index($2,":")-2,2)); for (i=5; i>0; i-=2) x = x"."strtonum("0x"substr($2,i,2))}{print x":"strtonum("0x"substr($2,index($2,":")+1,4))}'

# No Gawk
# Local
grep -v "rem_address" /proc/net/tcp  | awk 'function hextodec(str,ret,n,i,k,c){

marwei

Kafka 0.11.0.0 (Confluent 3.3.0) added support to manipulate offsets for a consumer group via cli kafka-consumer-groups command.

1. List the topics to which the group is subscribed

kafka-consumer-groups --bootstrap-server <kafkahost:port> --group <group_id> --describe

Note the values under "CURRENT-OFFSET" and "LOG-END-OFFSET". "CURRENT-OFFSET" is the offset where this consumer group is currently at in each of the partitions.

2. Reset the consumer offset for a topic (preview)

jiffle

Spock Useful Patterns Cheatsheet

Adding sequences of behaviour to Mocks and Stubs

The >>> operator allows a sequence of values to be returned:

myMock.someCall() >>> ['first value', 'second value', 'third value', 'etc']

This returns each string in turn. Behaviour (such as throwing exceptions) in closures cannot be used by this operator.

The >> operator allows value or behaviour (closures) to be returned

brokaw

#!/usr/bin/env python3
# A text filter for BBEdit. If it encounters a JSON error, it writes an error message
# to stderr (appears in a new BBEdit window) and leaves the original text unaltered.
# c.f. http://crisp.tumblr.com/post/2574967567/json-pretty-print-formatting-in-bbedit
# c.f. http://blog.scottlowe.org/2013/11/11/making-json-output-more-readable-with-bbedit/

import json
import sys

def main():

vasanthk

System Design Cheatsheet

Picking the right architecture = Picking the right battles + Managing trade-offs

Basic Steps

1. Clarify and agree on the scope of the system

• User cases (description of sequences of events that, taken together, lead to a system doing something useful)
  • Who is going to use it?
  • How are they going to use it?

mfuerstenau

  ZigZag-Encoding
  ---------------
  
  Maps negative values to positive values while going back and
  forth (0 = 0, -1 = 1, 1 = 2, -2 = 3, 2 = 4, -3 = 5, 3 = 6 ...)

  (i >> bitlength-1) ^ (i << 1)

  with "i" being the number to be encoded, "^" being
  XOR-operation and ">>" would be arithemtic shifting-operation

PurpleBooth

Project Title

One Paragraph of project description goes here

Getting Started

These instructions will get you a copy of the project up and running on your local machine for development and testing purposes. See deployment for notes on how to deploy the project on a live system.

Prerequisites

staltz

The introduction to Reactive Programming you've been missing

(by @andrestaltz)

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This tutorial as a series of videos

If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.

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