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@ticean
ticean / kafka-cheat-sheet.md
Created Apr 29, 2019 — forked from ursuad/kafka-cheat-sheet.md
Quick command reference for Apache Kafka
View kafka-cheat-sheet.md

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 ...

@ticean
ticean / tinyrepl.clj
Last active Jul 14, 2018
Lil' Nestable Clojure REPL
View tinyrepl.clj
(def ^:dynamic repl-context)
(defn tinyrepl
"Simple REPL. :quit to exit."
[{:keys [prefix layer] :or {prefix "" layer 1} :as context}]
(let [pre (str prefix ">>>")]
(with-bindings {#'repl-context (assoc context
:prefix pre
:layer (inc layer))}
(print (str (ns-name *ns*) (str pre " ")))
(flush)
View keybase.md

Keybase proof

I hereby claim:

  • I am ticean on github.
  • I am ticean (https://keybase.io/ticean) on keybase.
  • I have a public key whose fingerprint is 4027 3B22 CA85 EDBE A3C3 A3FD 678F F894 896B C705

To claim this, I am signing this object:

View postgres_queries_and_commands.sql
-- show running queries (pre 9.2)
SELECT procpid, age(query_start, clock_timestamp()), usename, current_query
FROM pg_stat_activity
WHERE current_query != '<IDLE>' AND current_query NOT ILIKE '%pg_stat_activity%'
ORDER BY query_start desc;
-- show running queries (9.2)
SELECT pid, age(query_start, clock_timestamp()), usename, query
FROM pg_stat_activity
WHERE query != '<IDLE>' AND query NOT ILIKE '%pg_stat_activity%'
@ticean
ticean / 00_destructuring.md
Created Aug 13, 2016 — forked from john2x/00_destructuring.md
Clojure Destructuring Tutorial and Cheat Sheet
View 00_destructuring.md

Clojure Destructuring Tutorial and Cheat Sheet

(Related blog post)

Simply put, destructuring in Clojure is a way extract values from a datastructure and bind them to symbols, without having to explicitly traverse the datstructure. It allows for elegant and concise Clojure code.

Vectors

@ticean
ticean / logfmt-demo.js
Last active Apr 20, 2016
Node.js Contextual Logging with Logfmt
View logfmt-demo.js
// Demo contextual log pattern with the logfmt-node library.
var logger = require('logfmt').namespace({app: "test"});
function task(id, throwError) {
var taskLogger = logger.namespace({event: "task.run", "task.id": id});
var taskTimer = taskLogger.time();
taskLogger.log({msg: "Starting the task.", at: "start"});
setTimeout(function() {
@ticean
ticean / rails_load_path_tips.md
Last active Aug 29, 2015 — forked from maxim/rails_load_path_tips.md
How to use rails load paths, app, and lib directories.
View rails_load_path_tips.md

In Rails 3

NOTE: This post now lives (and kept up to date) on my blog: http://hakunin.com/rails3-load-paths

If you add a dir directly under app/

Do nothing. All files in this dir are eager loaded in production and lazy loaded in development by default.

If you add a dir under app/something/

View boot2docker-use-nfs.sh
#!/bin/bash
#
# This script will mount /Users in the boot2docker VM using NFS (instead of the
# default vboxsf). It's probably not a good idea to run it while there are
# Docker containers running in boot2docker.
#
# Usage: sudo ./boot2docker-use-nfs.sh
#
View change_db_owner.sh
#!/bin/bash
usage()
{
cat << EOF
usage: $0 options
This script set ownership for all table, sequence and views for a given database
Credit: Based on http://stackoverflow.com/a/2686185/305019 by Alex Soto
View sortable-thead.cljs
(ns ingredient.core
(:require [clojure.browser.repl]
[om.core :as om :include-macros true]
[sablono.core :as html :refer [html] :include-macros true]
[cljs.core.async :refer [put! chan close! sliding-buffer]])
(:require-macros [cljs.core.async.macros :refer [go]]))
(enable-console-print!)
(def app-state
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