sancar

And upgradable read write lock for go

UpgradableRWMutex is an enhanced version of the standard sync.RWMutex. It has the all methods sync.RWMutex with exact same semantics. It gives more methods to give upgradable-read feature.

The new semantics for upgradable-read are as follows:

• Multiple goroutines can get read-lock together with a single upgradable-read-lock.
• Only one goroutine can have a write-lock and no read-lock/upgradable-read-lock can be acquired in this state.

m-radzikowski

#!/usr/bin/env bash

set -Eeuo pipefail
trap cleanup SIGINT SIGTERM ERR EXIT

script_dir=$(cd "$(dirname "${BASH_SOURCE[0]}")" &>/dev/null && pwd -P)

usage() {
  cat <<EOF
Usage: $(basename "${BASH_SOURCE[0]}") [-h] [-v] [-f] -p param_value arg1 [arg2...]

enricofoltran

package main

import (
	"context"
	"flag"
	"fmt"
	"log"
	"net/http"
	"os"
	"os/signal"

djspiewak

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

norswap

package demo;

public interface Node {}

leonardofed

A curated list of AWS resources to prepare for the AWS Certifications

A curated list of awesome AWS resources you need to prepare for the all 5 AWS Certifications. This gist will include: open source repos, blogs & blogposts, ebooks, PDF, whitepapers, video courses, free lecture, slides, sample test and many other resources.

---

ericelliott

Essential JavaScript Links

I no longer mantain this list. There are lots of other very comprehensive JavaScript link lists out there. Please see those, instead (Google "awesome JavaScript" for a start).

tsiege

ANNOUNCEMENT

I have moved this over to the Tech Interview Cheat Sheet Repo and has been expanded and even has code challenges you can run and practice against!






\

veysiertekin

mvn deploy:deploy-file -DgroupId=com.blogspot.pragmastic -DartifactId=old-stuff -Dversion=0.9
-Dpackaging=jar -Dfile=lib/old-stuff.jar -Durl=file://${project.basedir}/lib
-DrepositoryId=local-project-libraries

mvn install:install-file -Dfile=<path-to-file> -DgroupId=<group-id> -DartifactId=<artifact-id> -Dversion=<version> -Dpackaging=<packaging>
# example
mvn install:install-file -Dfile=/Users/vertekin/Downloads/jaxb-api-2.1.jar -DgroupId=javax.xml -DartifactId=jaxb-api -Dversion=2.1 -Dpackaging=jar

evandrix

Here are a list of headless browsers that I know about:

• [HtmlUnit][1] - Java. Custom browser engine. JavaScript support/DOM emulated. Open source.
• [Ghost][2] - Python only. WebKit-based. Full JavaScript support. Open source.
• [Twill][3] - Python/command line. Custom browser engine. No JavaScript. Open source.
• [PhantomJS][4] - Command line/all platforms. WebKit-based. Full JavaScript support. Open source.
• [Awesomium][5] - C++/.Net/all platforms. Chromium-based. Full JavaScript support. Commercial/free.
• [SimpleBrowser][6] - .Net 4/C#. Custom browser engine. No JavaScript support. Open source.
• [ZombieJS][7] - Node.js. Custom browser engine. JavaScript support/emulated DOM. Open source.
• [EnvJS][8] - JavaScript via Java/Rhino. Custom browser engine. JavaScript support/emulated DOM. Open source.