igor ig0r

Top 1000 Java Interview Question & Answers by Knowledge Powerhouse

Copyright © 2017 Knowledge Powerhouse

All rights reserved.

No part of this book can be copied in any form. The publisher and the author have used good faith efforts to ensure that the information in this book is correct and accurate. The publisher and the author disclaim all responsibility for errors or omissions. Use of the information in this book is at your own risk.

If you are getting this in gdb on macOS while trying to run a program:

Unable to find Mach task port for process-id 57573: (os/kern) failure (0x5).
 (please check gdb is codesigned - see taskgated(8))

Open Keychain Access
In menu, open Keychain Access > Certificate Assistant > Create a certificate
Give it a name (e.g. gdbc)

Whether you're trying to give back to the open source community or collaborating on your own projects, knowing how to properly fork and generate pull requests is essential. Unfortunately, it's quite easy to make mistakes or not know what you should do when you're initially learning the process. I know that I certainly had considerable initial trouble with it, and I found a lot of the information on GitHub and around the internet to be rather piecemeal and incomplete - part of the process described here, another there, common hangups in a different place, and so on.

In an attempt to coallate this information for myself and others, this short tutorial is what I've found to be fairly standard procedure for creating a fork, doing your work, issuing a pull request, and merging that pull request back into the original project.

Creating a Fork

Just head over to the GitHub page and click the "Fork" button. It's just that simple. Once you've done that, you can use your favorite git client to clone your repo or j

Vagrant Setup

This tutorial guides you through creating your first Vagrant project.

We start with a generic Ubuntu VM, and use the Chef provisioning tool to:

install packages for vim, git
create user accounts, as specified in included JSON config files
install specified user dotfiles (.bashrc, .vimrc, etc) from a git repository

Afterwards, we'll see how easy it is to package our newly provisioned VM

Mac web developer apps

This gist's comment stream is a collection of webdev apps for OS X. Feel free to add links to apps you like, just make sure you add some context to what it does — either from the creator's website or your own thoughts.

— Erik

	Github.com ui .currently does not natively supoport search for multiple topic tags as of now. However their api allows you to query multiple tags. Below is a simple example to query github.com with ecs and go topic tags.

	curl -H "Accept: application/vnd.github.mercy-preview+json" \
	https://api.github.com/search/repositories?q=topic:ecs+topic:go

	Response from the github can be rather verbose so lets filter only relavant info such repo url and description.

	curl -H "Accept: application/vnd.github.mercy-preview+json" \
	https://api.github.com/search/repositories\?q\=topic:ecs+topic:go \| jq '.items[] \| {url:.url, description:.description}'

	# PREREQUISITES:
	# Setup a Mesos cluster and install Marathon framework

	MARATHON_HOST="http://<marathon_host>/marathon"
	# this could be an internal ELB that the Gateway nodes can use to auto-discover services
	INTERNAL_MARATHON_HOST="http://<internal_marathon_host>/marathon"
	# a wildcard domain configured with *.api.anydomain
	API_DOMAIN="api.<my-domain>"

	# -------------------------

	SMALL_LINUX : computeTemplate {
	// 3839 is a Red Hat Enterprise Linux - 6 (64 bit)
	imageId "3839"
	// Mandatory. Files from the local directory will be copied to this directory on the remote machine.
	remoteDirectory "/tmp/gs-files"
	// Mandatory. Amount of RAM available to machine.
	machineMemoryMB 4096
	// Mandatory. Hardware ID.
	hardwareId largeHardwarePrivateOnlyId
	// Mandatory. All files from this LOCAL directory will be copied to the remote machine directory.

	"deleteDummyFiles" : { prefix, xFiles ->
	def p = ~/$prefix.*\.txt/
	def counter=0
	def howManyfiles = xFiles.toInteger()
	println "Deleting ${howManyfiles} .txt files '${prefix}*' in ${dummyFilesFolder} ..."
	new File(dummyFilesFolder).eachFileMatch(p) {f ->
	if ( counter < howManyfiles ) {
	counter++
	println "Deleting file #${counter} ${f.getName()} ..."
	f.delete()

	---
	# Data needed for Class['openstack::compute']

	# The IP and interface that external sources will use to communicate with the instance and hypervisors.
	openstack::compute::public_interface: 'eth0'
	openstack::compute::internal_address: "%{ipaddress_eth0}"
	openstack::compute::iscsi_ip_address: "%{ipaddress_eth0}"

	# The interface that will handle instance to intance communication and instance outbound traffic.
	openstack::compute::private_interface: 'eth1'