basaran

The Problem

In Javascript this is bound in unexpected ways. Functions, in particular, create a new 'this' and so when you want to keep a reference to an "outer" object you sometimes see the pattern:

var self = this;

as in:

var self = this;

Moved to git repository: https://github.com/denji/nginx-tuning

NGINX Tuning For Best Performance

For this configuration you can use web server you like, i decided, because i work mostly with it to use nginx.

Generally, properly configured nginx can handle up to 400K to 500K requests per second (clustered), most what i saw is 50K to 80K (non-clustered) requests per second and 30% CPU load, course, this was 2 x Intel Xeon with HyperThreading enabled, but it can work without problem on slower machines.

You must understand that this config is used in testing environment and not in production so you will need to find a way to implement most of those features best possible for your servers.

Better local require() paths for Node.js

Problem

When the directory structure of your Node.js application (not library!) has some depth, you end up with a lot of annoying relative paths in your require calls like:

const Article = require('../../../../app/models/article');

Those suck for maintenance and they're ugly.

	#!/usr/bin/env bash

	# lists all unused AWS security groups.
	# a group is considered unused if it's not attached to any network interface.
	# requires aws-cli and jq.

	# all groups
	aws ec2 describe-security-groups \
	\| jq --raw-output '.SecurityGroups[] \| [.GroupName, .GroupId] \| @tsv' \
	\| sort > /tmp/sg.all

	#!/bin/bash

	set -u
	set -e

	set -o pipefail

	export PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin

	cat <<'EOF' > /etc/modprobe.d/blacklist-ipv6.conf

	;; I am not a regular emacs user and haven't played with lisp for many years.
	;; I struggled for a couple of days trying to tweak org-capture-templates to
	;; get my desired behavior for journal entries. I hope this helps someone!
	;;
	;; I have been following the excellent guide http://doc.norang.ca/org-mode.html
	;; The "journal" template was the one I wanted to tweak. I use a date-based
	;; journal filename, e.g. "2015-09-22-Journal-Entry.org". The contents of the
	;; file consist of a top-level headline with a human-friendly date, followed
	;; by second-level headline with the time and brief journal note. For example:
	;;

	Use: for testing against email regex
	ref: http://codefool.tumblr.com/post/15288874550/list-of-valid-and-invalid-email-addresses


	List of Valid Email Addresses

	[email protected]
	[email protected]
	[email protected]
	[email protected]

	/*
	Theme Name: Hemingway Rewritten – WordPress.com
	Theme URI: http://theme.wordpress.com/themes/hemingway-rewritten/
	Description: Description
	Version: 1.0
	Author: Anders Noren
	Author URI: http://www.andersnoren.se
	License: GPL v2 or later
	License URI: http://www.gnu.org/licenses/gpl-2.0.html
	Text Domain: hemingway-rewritten

	// this is the background code...

	// listen for our browerAction to be clicked
	chrome.browserAction.onClicked.addListener(function (tab) {
	// for the current tab, inject the "inject.js" file & execute it
	chrome.tabs.executeScript(tab.ib, {
	file: 'inject.js'
	});
	});