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Matt Keranen kmatt

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@prologic
prologic / LearnGoIn5mins.md
Last active February 18, 2024 15:59
Learn Go in ~5mins
@MineRobber9000
MineRobber9000 / donotuse3.py
Last active February 8, 2024 12:48
How to NEVER use lambdas - Python 3 edition
###########################################################
# How to NEVER use lambdas. An inneficient and yet educa- #
# tonal [sic] guide to the proper misuse of the lambda #
# construct in Python 3.x. [DO NOT USE ANY OF THIS EVER] #
# original by (and apologies to): e000 (13/6/11) #
# now in Python 3 courtesy of: khuxkm (17/9/20) #
###########################################################
## Part 1. Basic LAMBDA Introduction ##
# If you're reading this, you've probably already read e000's
@brookisme
brookisme / multiprocess.py
Last active May 8, 2021 04:37
Python Multiprocessing Helpers: Map with Pool, ThreadPool and more
import itertools
from multiprocessing import Process, cpu_count
from multiprocessing import Pool
from multiprocessing.pool import ThreadPool
#
# CONFIG
#
MAX_POOL_PROCESSES=cpu_count()-1
;; In response to blog post:
;; https://medium.com/@kasperpeulen/10-features-from-various-modern-languages-that-i-would-like-to-see-in-any-programming-language-f2a4a8ee6727
;; Run with lumo
;; https://github.com/anmonteiro/lumo
;;
;; # npm install -g lumo-cljs
;; lumo clojurescript-feature-examples.cljs
@marwei
marwei / how_to_reset_kafka_consumer_group_offset.md
Created November 9, 2017 23:39
How to Reset Kafka Consumer Group Offset

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.

  1. Reset the consumer offset for a topic (preview)
@evillemez
evillemez / wait-groups.go
Created October 16, 2016 00:50
Playing with WaitGroup in nested goroutines
package main
import (
"crypto/rand"
"fmt"
"math/big"
"os"
"sync"
"time"
)
@keberwein
keberwein / storm_trackr.R
Last active October 4, 2016 15:11
Track Unisys data available tropical storms
library(plyr); library(dplyr); library(leaflet); library(stringi);
library(htmltools); library(RColorBrewer); library(rvest)
# Parse and read storm track data.
html <- read_html('http://weather.unisys.com/hurricane/atlantic/2016/index.php')
links <- html_attr(html_nodes(html, "a"), "href")
links <- links[grep('track.dat', links)]
track <- select.list(links, title="Select storm:", graphics = FALSE)
#track <- "MATTHEW/track.dat"
@longcao
longcao / SparkCopyPostgres.scala
Last active December 26, 2023 14:47
COPY Spark DataFrame rows to PostgreSQL (via JDBC)
import java.io.InputStream
import org.apache.spark.sql.execution.datasources.jdbc.JdbcUtils
import org.apache.spark.sql.{ DataFrame, Row }
import org.postgresql.copy.CopyManager
import org.postgresql.core.BaseConnection
val jdbcUrl = s"jdbc:postgresql://..." // db credentials elided
val connectionProperties = {
@fntlnz
fntlnz / i3wm-fedora.md
Last active July 8, 2021 01:31
i3wm fedora lightdm

Install i3

dnf install i3

Add exec i3 to xinitrc

echo "exec i3" > ~/.xinitrc
@lloeki
lloeki / debian-xhyve.sh
Created August 27, 2015 17:21
Running debian 8.1 in xhyve
#!/bin/bash
# unfortunately debian currently panics in xhyve
tmp=$(mktemp -d)
pushd "$tmp"
iso="$HOME"/Downloads/debian-8.1.0-amd64-netinst.iso
#iso="$HOME"/Downloads/debian-8.1.0-i386-netinst.iso
echo "fixing disk"
dd if=/dev/zero bs=2k count=1 of=tmp.iso