jvrmaia

/* FUNÇÕES PARA DERIVADA */

/* regras básicas */
deriva(U+V,X,DU+DV):- deriva(U,X,DU), deriva(V,X,DV).
deriva(U-V,X,DU-DV):- deriva(U,X,DU), deriva(V,X,DV).
deriva(U*V,X,DU*V+U*DV):- deriva(U,X,DU), deriva(V,X,DV).
deriva(U/V,X,(DU*V+U*DV)/V^2):- deriva(U,X,DU), deriva(V,X,DV).

/* regra do polinômio */
deriva(U^N,X,N*U^(N-1)*DU):-

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hanoi :: Int -> a -> a -> a -> [(a,a)] 
hanoi 1 x y z = [(x,y)]
hanoi n x y z = hanoi (n-1) x y z ++ hanoi 1 x z y ++ hanoi (n-1) y z x

tamhanoi :: Int -> Int
tamhanoi n = 2^n - 1

jvrmaia

Guia do TMUX

obs.:

• o guia é baseado nas minhas configurações pessoais do Github
• C-c significa pressionar a tecla Control e em seguida a tecla c
• Prefixo + w significa digitar o comando de Prefixo e em seguida apertar w

Linhas de comando

jvrmaia

import cProfile


def fibonacci(n):
    if n < 0:
        raise ValueError("Negative arguments not implemented")
    print _fib(n)[0]


def _fib(n):

jvrmaia

#!/usr/bin/env bash

DATE=$(date +%s)
DEFAULT_KEYSTORE_STOREPASS=vmware
KEYSTORE_STOREPASS=`grep keystorePass /usr/lib/loginsight/application/etc/3rd_config/server.xml 2>/dev/null | gawk -F'"' '{print $4}' || echo ${DEFAULT_KEYSTORE_STOREPASS}`
TOMCAT=$(ls /usr/lib/loginsight/application/3rd_party 2>/dev/null | grep tomcat)
[ ! -d "/usr/lib/loginsight/application/3rd_party/${TOMCAT}" ] && \
    echo >/dev/stderr "ERROR: Unable to locate Tomcat directory, you must run this on the Log Insight virtual appliance...exiting" && \
    exit 255

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Producer

Setup
bin/kafka-topics.sh --zookeeper esv4-hcl197.grid.linkedin.com:2181 --create --topic test-rep-one --partitions 6 --replication-factor 1
bin/kafka-topics.sh --zookeeper esv4-hcl197.grid.linkedin.com:2181 --create --topic test --partitions 6 --replication-factor 3

Single thread, no replication

bin/kafka-run-class.sh org.apache.kafka.clients.tools.ProducerPerformance test7 50000000 100 -1 acks=1 bootstrap.servers=esv4-hcl198.grid.linkedin.com:9092 buffer.memory=67108864 batch.size=8196

jvrmaia

Keybase proof

I hereby claim:

• I am jvrmaia on github.
• I am jvrmaia (https://keybase.io/jvrmaia) on keybase.
• I have a public key ASA6QSI2quGUM2deijyUNeLmKG2MwpuwUwwucJMEVuwghAo

To claim this, I am signing this object:

jvrmaia

patrimômio mínimo de sobrevivência (PMS)

PMS = 6 x [gastos mensais]

patrimônio mínimo recomendado para sua segurança (PMR)

PMR = 12 x [gastos mensais] caso sua empregabilidade seja alta 20 x [gastos mensais] caso sua empregabilidade seja baixa

patrimônio ideal para sua idade e situação de consumo (PI)

jvrmaia

Quick Tips for Fast Code on the JVM

I was talking to a coworker recently about general techniques that almost always form the core of any effort to write very fast, down-to-the-metal hot path code on the JVM, and they pointed out that there really isn't a particularly good place to go for this information. It occurred to me that, really, I had more or less picked up all of it by word of mouth and experience, and there just aren't any good reference sources on the topic. So… here's my word of mouth.

This is by no means a comprehensive gist. It's also important to understand that the techniques that I outline in here are not 100% absolute either. Performance on the JVM is an incredibly complicated subject, and while there are rules that almost always hold true, the "almost" remains very salient. Also, for many or even most applications, there will be other techniques that I'm not mentioning which will have a greater impact. JMH, Java Flight Recorder, and a good profiler are your very best friend! Mea

jvrmaia

import re
import random
import time


WORD_LIST = [
    'glibc-x86_64.tar.gz',
    'rock_pesado.mp3',
    'spotify_64bits.tar.gz',
    'firefox-x86-64.tar.gz',