Julio Betta juliobetta

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.

Possible solutions

#Linux - Running a Node Service (PM2) PM2 is a replacement for Forever which is used to run Node services (see http://devo.ps/blog/2013/06/26/goodbye-node-forever-hello-pm2.html). It has a number of advantages over forever:

Log aggregation
API
Terminal monitoring
Clustering
JSON configuration

Installation

Rails Rspec APIs Testing Notes

Folders Structure

  spec
  |--- apis #do not put into controllers folder. 
        |--- your_api_test_spec.rb  
  |--- controllers
  |--- models
  |--- factories
 |--- views

Originally published in June 2008

When hiring Ruby on Rails programmers, knowing the right questions to ask during an interview was a real challenge for me at first. In 30 minutes or less, it's difficult to get a solid read on a candidate's skill set without looking at code they've previously written. And in the corporate/enterprise world, I often don't have access to their previous work.

To ensure we hired competent ruby developers at my last job, I created a list of 15 ruby questions -- a ruby measuring stick if you will -- to select the cream of the crop that walked through our doors.

What to expect

Candidates will typically give you a range of responses based on their experience and personality. So it's up to you to decide the correctness of their answer.

Intercept class method calls

Here’s an example of how to use metaclass programming to intercept class method calls similar to the method_missing technique in Ruby:

class ClassMethodInterceptor(type):

    def __getattr__(cls, name):
        return lambda *args, **kwargs: \
                   cls.static_method_missing(name, *args, **kwargs)

	CREATE EXTENSION tablefunc;

	CREATE TABLE sales(year int, month int, qty int);
	INSERT INTO sales VALUES(2007, 1, 1000);
	INSERT INTO sales VALUES(2007, 2, 1500);
	INSERT INTO sales VALUES(2007, 7, 500);
	INSERT INTO sales VALUES(2007, 11, 1500);
	INSERT INTO sales VALUES(2007, 12, 2000);
	INSERT INTO sales VALUES(2008, 1, 1000);
	INSERT INTO sales VALUES(2009, 5, 2500);

	class AppDelegate
	def application(application, didFinishLaunchingWithOptions:launchOptions)

	# For unit testing the application
	return true if RUBYMOTION_ENV == 'test'

	# Get the frame for the window
	@window = UIWindow.alloc.initWithFrame(UIScreen.mainScreen.bounds)

	# Load all the data from the API

	# Thee will be more information here when I share the entire problem space I'm working on, but
	# in short, this is preview material for my second talk in a series called "What Computer Scientists Know".
	# The first talk is on recursion, and goes through several examples., leading up to a problem based
	# on a simple puzzle that initial estimates based on performance of a previous puzzle would take years
	# to solve on modern computers with the techniques shown in Ruby. That sets the stage for improving the
	# performance of that problem with threading, concurrency, and related tuning.
	#
	# The second talk is on threading and concurrency, touching on algorithmic performance as well.
	# Using some knowledge of the problem (board symmetry, illegal moves, etc), we reduce the problem space
	# to about .5% of what we initially thought it was. Still, the initial single threaded solution took more

	/*
	* Copyright 2014 Julian Shen
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software

	# to generate your dhparam.pem file, run in the terminal
	openssl dhparam -out /etc/nginx/ssl/dhparam.pem 2048