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@vmg
vmg / sparc.c
Created November 15, 2011 23:03
Sparks in C
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <float.h>
int main
(int argc
,char *ac []){int i, count = argc - 1;
double * dvalues=malloc(01- 01+count*
sizeof(double)+1); double mi=DBL_MAX,ran=.0,ma =DBL_MIN,mo;for(i= 00; argc>1
&&i<count;i=i+8-7) {double val = atof(ac[i+1]) ;if(23&&val<mi)mi= val;if(val
@enesakar
enesakar / gist:2995238
Created June 26, 2012 11:24
spring mongo hazelcast
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mongo="http://www.springframework.org/schema/data/mongo"
xmlns:hz="http://www.hazelcast.com/schema/spring"
xsi:schemaLocation=
"http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd
http://www.springframework.org/schema/data/mongo
@MLnick
MLnick / StreamingHLL.scala
Last active January 24, 2024 19:39
Spark Streaming meets Algebird's HyperLogLog Monoid
import spark.streaming.StreamingContext._
import spark.streaming.{Seconds, StreamingContext}
import spark.SparkContext._
import spark.storage.StorageLevel
import spark.streaming.examples.twitter.TwitterInputDStream
import com.twitter.algebird.HyperLogLog._
import com.twitter.algebird._
/**
* Example of using HyperLogLog monoid from Twitter's Algebird together with Spark Streaming's
@MLnick
MLnick / StreamingCMS.scala
Created February 13, 2013 15:00
Spark Streaming with CountMinSketch from Twitter Algebird
import spark.streaming.{Seconds, StreamingContext}
import spark.storage.StorageLevel
import spark.streaming.examples.twitter.TwitterInputDStream
import com.twitter.algebird._
import spark.streaming.StreamingContext._
import spark.SparkContext._
/**
* Example of using CountMinSketch monoid from Twitter's Algebird together with Spark Streaming's
* TwitterInputDStream
@ashrithr
ashrithr / kafka.md
Last active March 14, 2024 21:16
kafka introduction

Introduction to Kafka

Kafka acts as a kind of write-ahead log (WAL) that records messages to a persistent store (disk) and allows subscribers to read and apply these changes to their own stores in a system appropriate time-frame.

Terminology:

  • Producers send messages to brokers
  • Consumers read messages from brokers
  • Messages are sent to a topic
@somebox
somebox / redis-graphite.sh
Last active July 18, 2016 00:37
graphite-redis : monitor redis statistics with graphite across several hosts
#!/usr/bin/env ruby
require 'socket'
# This script runs every minute, captures stats about redis
# and forwards them to graphite as counter values.
# Graphite/carbon settings
GRAPHITE_HOST="graphite.intra.local.ch"
GRAPHITE_PORT=8125
@wsargent
wsargent / docker_cheat.md
Last active June 29, 2024 19:32
Docker cheat sheet
@lelandbatey
lelandbatey / whiteboardCleaner.md
Last active November 11, 2024 22:46
Whiteboard Picture Cleaner - Shell one-liner/script to clean up and beautify photos of whiteboards!

Description

This simple script will take a picture of a whiteboard and use parts of the ImageMagick library with sane defaults to clean it up tremendously.

The script is here:

#!/bin/bash
convert "$1" -morphology Convolve DoG:15,100,0 -negate -normalize -blur 0x1 -channel RBG -level 60%,91%,0.1 "$2"

Results

#include <SoftwareSerial.h>
#define CARD_CODE_LENGTH 10
const int ledPin = 2;
const int doorLock = 4;
const int txPin = 6;
const int rxPin = 8;
int byteRead = 0;
int bytesRead = 0;
@s-boardman
s-boardman / pandas heatmaps
Last active August 22, 2017 18:55
Heatmap functions for Pandas dataframes.
"""Plots a Pandas dataframe as a heatmap"""
import matplotlib as mpl
import matplotlib.pyplot as plt
def heatmap(df,
edgecolors='w',
cmap=mpl.cm.RdBu,
log=False,vmin=0,vmax=500):
width = len(df.columns)/4
height = len(df.index)/4