antirez

# LVDB - LLOOGG Memory DB
# Copyriht (C) 2009 Salvatore Sanfilippo <antirez@gmail.com>
# All Rights Reserved

# TODO
# - cron with cleanup of timedout clients, automatic dump
# - the dump should use array startsearch to write it line by line
#   and may just use gets to read element by element and load the whole state.
# - 'help','stopserver','saveandstopserver','save','load','reset','keys' commands.
# - ttl with milliseconds resolution 'ttl a 1000'. Check ttl in dump!

anhtranbk

# list topics
kafka-topics.sh --list --zookeeper 192.168.23.64:2181

# describe topic
kafka-topics.sh --describe --zookeeper 192.168.23.64:2181 --topic test

# create, alter topic
kafka-topics.sh --create --zookeeper 192.168.23.64:2181 --topic test --replication-factor 2 --partitions 3

# Read data from a Kafka topic and write it to standard output

jmindek

distinct column -> For each row returned, return only the unique members of a set. Think of it as for each row in a projection, concatenate all the column values and return only the strings that are unique.

test_db=# SELECT DISTINCT parent_id, child_id, id FROM test.foo_table ORDER BY parent_id, child_id, id LIMIT 10;
parent_id | child_id | id
-----------+------------+-----------------------------
1000040 | 103 | 1000040|2645405726|0001|103

phrawzty

#!/usr/bin/env python2

import SimpleHTTPServer
import SocketServer
import logging

PORT = 8000

class GetHandler(SimpleHTTPServer.SimpleHTTPRequestHandler):

listochkin

  --log_gc (Log heap samples on garbage collection for the hp2ps tool.)
        type: bool  default: false
  --expose_gc (expose gc extension)
        type: bool  default: false
  --max_new_space_size (max size of the new generation (in kBytes))
        type: int  default: 0
  --max_old_space_size (max size of the old generation (in Mbytes))
        type: int  default: 0
  --max_executable_size (max size of executable memory (in Mbytes))
        type: int  default: 0

nevans

# Pass in an enumeration of data and
# (optionally) a block to extract the grouping aspect of the data.
#
# Optional: sort_by lambda (operates on group key and count)
#
def puts_hist(data, sort_by:nil, &blk)
  data   = data.map(&blk) if blk
  counts = data.each_with_object(Hash.new(0)) {|k,h| h[k]+=1}
  max    = counts.values.max
  width  = Pry::Terminal.size!.last

amitchhajer

git ls-files -z | xargs -0n1 git blame -w | perl -n -e '/^.*\((.*?)\s*[\d]{4}/; print $1,"\n"' | sort -f | uniq -c | sort -n

marvin

import socket

HOST = 'localhost'
PORT = 9876
ADDR = (HOST,PORT)
BUFSIZE = 4096
videofile = "videos/royalty-free_footage_wien_18_640x360.mp4"

bytes = open(videofile).read()

timoxley

var isPortTaken = function(port, fn) {
  var net = require('net')
  var tester = net.createServer()
  .once('error', function (err) {
    if (err.code != 'EADDRINUSE') return fn(err)
    fn(null, true)
  })
  .once('listening', function() {
    tester.once('close', function() { fn(null, false) })
    .close()

un33k

FILE SPACING:

 # double space a file
 sed G

 # double space a file which already has blank lines in it. Output file
 # should contain no more than one blank line between lines of text.
 sed '/^$/d;G'