MichaelDrogalis

I've been working with Apache Kafka for over 7 years. I inevitably find myself doing the same set of activities while I'm developing or working with someone else's system. Here's a set of Kafka productivity hacks for doing a few things way faster than you're probably doing them now. 🔥

• Show me all my Kafka topics and their partitions, replicas, and consumers
• Show me the contents of a topic
• Create a Kafka topic
• Produce messages to a Kafka topic
• Validate the schema of messages before producing to a topic
• Do all of this at a distance

Get the tools

mfikes

Note: These workarounds covered issues in lein-tools-deps 0.3.0-SNAPSHOT. If using 0.4.1 or later, you should not encounter the issues below.

The following provides some workarounds for some issues when using lein-tools-deps from Cursive on macOS.

Path to clojure

By default, the lein-tools-deps plugin won't see /usr/local/bin/clojure when Cursive processes project.clj, as it evidently has a degenerate path.

You will see an error like the following in the IntelliJ Event Log when it tries to process your project.clj file:

thegeez

(ns net.thegeez.advent.spec-parsing
  (:require [clojure.string :as str]
            [clojure.spec :as s]
            [clojure.spec.gen :as gen]
            [clojure.test.check.generators :as tgen]))
;; Dependencies:
;; [org.clojure/clojure "1.9.0-alpha14"]
;; [org.clojure/test.check "0.9.0"]

;; Advent of Code is a series of code challenges in the form of an advent

garybernhardt

This document has moved!

It's now here, in The Programmer's Compendium. The content is the same as before, but being part of the compendium means that it's actively maintained.

flackend

Resources

• Pfctl man page (apple.com)
• Pf.conf man page (apple.com)
• How to secure your Mac when using it on wireless networks (sarfata.org)
• Pf on OS X 10.7 (zomo.co.uk)
• OpenBSD packet filter (PF): Real life example (daemon-notes.com)
• Firewalling with OpenBSD's PF packet filter (rlworkman.net)
• PF (OpenBSD) (readthedocs.org)
• PF rules (kernel-panic.it)

cszentkiralyi

Prereqs

These are for the combined vim-sexp (https://github.com/guns/vim-sexp) and vim-sexp-mappings-for-regular-people (https://github.com/tpope/vim-sexp-mappings-for-regular-people) plugins. vim-sexp is neat on its own but Tim Pope makes common stuff much easier.

Note that some vim-sexp functionality depends on <LocalLeader> mappings. This is a different leader key than the global leader, and is the variable maplocalleader (instead of mapleader). To see if you have this set, use :echo maplocalleader; if it errors out you'll need to set it, otherwise it will echo the key. If you want to set your LocalLeader to <Space>, you'll need two commands in your .vimrc, since by default <Space> is bound to <Right> in normal mode:

nnoremap <Space> <Nop>
let maplocalleader=" "

TOC

zchee

--- Actions ---
$Copy                                              <M-C>
$Cut                                               <M-X> <S-Del>
$Delete                                            <Del> <BS> <M-BS>
$LRU                                              
$Paste                                             <M-V>
$Redo                                              <M-S-Z> <A-S-BS>
$SearchWeb                                         <A-S-G>
$SelectAll                                         <M-A>
$Undo                                              <M-Z>

staltz

The introduction to Reactive Programming you've been missing

(by @andrestaltz)

---

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.

---

slemiere

module Mongoid
  module Document
    def instantiate(attrs = nil, criteria_instance_id = nil)
      attributes = attrs || {}
      doc = allocate
      doc.criteria_instance_id = criteria_instance_id
      doc.instance_variable_set(:@attributes, attributes)
      doc.apply_defaults
      IdentityMap.set(doc) if identity_map_set_possible?(criteria_instance_id)
      doc.run_callbacks(:initialize) unless doc._initialize_callbacks.empty?

alexbevi

# Git pre-commit hook to check all staged Ruby (*.rb/haml/coffee) files 
# for Pry binding references
#
# Installation
#
#   ln -s /path/to/pre-commit.sh /path/to/project/.git/hooks/pre-commit
#
# Based on 
#
#   http://codeinthehole.com/writing/tips-for-using-a-git-pre-commit-hook/