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#!/bin/bash

# Syntax: ifconfig <interface-name> | grep "inet addr" | cut -d ':' -f 2 | cut -d ' ' -f 1

# Example: Get the IP address of the eth0 network interface
ifconfig eth0 | grep "inet addr" | cut -d ':' -f 2 | cut -d ' ' -f 1

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#!/usr/bin/env python

# Usage: python simple_http_server_cors.py <port>

try:
    # try to use Python 3
    from http.server import HTTPServer, SimpleHTTPRequestHandler, test as test_orig
    import sys
    def test (*args):
        test_orig(*args, port=int(sys.argv[1]) if len(sys.argv) > 1 else 8000)

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Basic Semantic Versioning

• PATCH 0.0.x level changes for implementation level detail changes, such as small bug fixes
• MINOR 0.x.0 level changes for any backwards compatible API changes, such as new functionality/features
• MAJOR x.0.0 level changes for backwards incompatible API changes, such as changes that will break existing users code if they update

Further Reading

• http://semver.org/
• http://guides.rubygems.org/patterns/#semantic-versioning

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Run the following command in the terminal.

sudo killall -HUP mDNSResponder; sudo killall mDNSResponderHelper; sudo dscacheutil -flushcache

Make sure to also flush any other host name caches, like Chrome's.

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Renaming a git branch

To rename a local git branch:

git branch -m <current_name> <new_name>

This is expecially useful when creating a feature under the wrong name when using git flow.

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import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

public enum State {
	
    Ready(Event.Deposit, Event.Quit),
    Waiting(Event.Select, Event.Refund),
    Dispensing(Event.Remove),

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node-red

Node-RED is an awesome open-source tool for stream processing.

You can drag and drop "nodes" into your workflow, that can do things from processing a twitter stream to calling functions to sentiment analysis and automation.

All this is done with a visual drag and drop tool. No code to write (unless you want to)! Very powerful for simple to very advanced use cases.

Here's the command to run to launch Node-RED. Just make sure you have Docker installed.

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process.stdout.write('\x1b[2J');
process.stdout.write('\x1b[0f');

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Increments the version and creates a git tag, pushes the tags to the remote, then publishes to npm.

npm version patch
git push && git push --tags
npm publish

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import AWS from 'aws-sdk'

export default (process.env.IS_OFFLINE)
  ? new AWS.DynamoDB.DocumentClient({
    region: 'localhost',
    endpoint: 'http://localhost:8000',
    accessKeyId: 'NONE',
    secretAccessKey: 'NONE'
  })
  : new AWS.DynamoDB.DocumentClient()