Kay Gosho acro5piano

Remove white background color of an image in ImageMagick

$ convert  your.jpg  -transparent white  your.png

This specification is inspired by and supersedes the [AngularJS commit message format][commit-message-format].

We have very precise rules over how our Git commit messages must be formatted. This format leads to easier to read commit history.

Each commit message consists of a header, a body, and a footer.

This assumes that:

You are using Nginx.
You want to accept incoming connections on port 80.
Your Node.js app is listening on port 3000.
You want to be able to connect to your Node.js instance directly as well as via the load balancer.

####1. Create load balancer

A simple Ghostscript command to merge two PDFs in a single file is shown below:

gs -dNOPAUSE -sDEVICE=pdfwrite -sOUTPUTFILE=combine.pdf -dBATCH 1.pdf 2.pdf

Install Ghostscript:

Type the command sudo apt-get install ghostscript to download and install the ghostscript package and all of the packages it depends on.

MacOSX + Vagrant + CoreOS + Docker + Ubuntuの環境。

2014年6月11日時点での情報。

Command Line

pry -r ./config/app_init_file.rb - load your app into a pry session (look at the file loaded by config.ru)
pry -r ./config/environment.rb - load your rails into a pry session

Debugger

deprecated

for_window [class="^.*"] border pixel 1
new_window 1pixel

	/**
	* VH and VW units can cause issues on iOS devices: http://caniuse.com/#feat=viewport-units
	*
	* To overcome this, create media queries that target the width, height, and orientation of iOS devices.
	* It isn't optimal, but there is really no other way to solve the problem. In this example, I am fixing
	* the height of element `.foo` —which is a full width and height cover image.
	*
	* iOS Resolution Quick Reference: http://www.iosres.com/
	*/

	#!/usr/bin/env python
	import numpy as np
	import scipy.spatial.distance

	if __name__ == '__main__':
	x = np.array([1, 1, 1, 1, 1])
	y = np.array([1, 0, 1, 0, 1])
	z = np.array([0, 1, 0, 0, 0])

	print 1 - scipy.spatial.distance.cosine(x, y)

	-- http://www.postgresql.org/message-id/[email protected]

	CREATE OR REPLACE FUNCTION
	random_text(INTEGER)
	RETURNS TEXT
	LANGUAGE SQL
	AS $$
	SELECT array_to_string(array(
	SELECT SUBSTRING('23456789abcdefghjkmnpqrstuvwxyz'
	FROM floor(random()*31)::int+1 FOR 1)