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合成多张图片

以下只适合 v3.5.0 即以前的版本。v3.6.0 以后，对选项增加了 shellescape 减少了命令行注入的风险。

ImageMagick 的 composite 命令可以合成图片，但是一次只能合成两张。如果需要合成多张图片，得用 convert 命令和 -composite 选项。MiniMagick 的push方法，可添加选项和参数（就像在命令行操作一样）。下是一个合成多张图片的 CarrierWave 的 process 示例。

  def composite_images
    manipulate! do |img|
      img.combine_options(:convert) do |c|

Contrived example demonstrating microgem dependencies

contrived is a microgem that depends on another microgem array_range, however gemspecs don't support DVCS dependencies. So how do we solve this without prematurely denting the universe?

Just use bundler.

Usage

Add all microgems to your project's Gemfile:

sortedGroupBy

jsFiddle Example

Convenience function for performing a groupBy on a list then a sortBy on the resulting groups using Underscore methods.

sortedGroupBy(list, groupByIterator, sortByIterator)

	/**
	* DWTFYW License
	* Author: Tony Brix, http://tonybrix.info
	*
	* jquery plugin for showing tooltip on overflow
	*
	* USAGE:
	*
	* $("input, select").tooltipOnOverflow();
	*

	module Middleware
	class Logger
	def initialize(app, logger)
	@app = app
	@logger = logger
	end

	def call(env)

	headers = env.select {\|k,v\| k.start_with? 'HTTP_'}

	#
	# Initialize the stuff
	#
	# We build the status bar item menu
	def setupMenu
	menu = NSMenu.new
	menu.initWithTitle 'FooApp'
	mi = NSMenuItem.new
	mi.title = 'Hellow from MacRuby!'
	mi.action = 'sayHello:'

	$ chmod +x ./proxy_list_fetcher.rb
	$ ./proxy_list_fetcher.rb \| head
	180.94.88.58 8080 Afghanistan fast HTTPS High +KA
	187.87.155.2 8080 Brazil fast HTTPS High +KA
	120.132.132.119 8080 China medium HTTPS High +KA
	210.211.109.244 8081 Viet Nam fast HTTP Low
	216.244.71.143 3128 United States medium HTTPS High +KA
	190.237.224.22 8080 Peru slow HTTPS High +KA

	// Use Gists to store code you would like to remember later on
	console.log(window); // log the "window" object to the console