ZakharDay ZakharDay

Lambda: standard

# Creating a lambda
l = lambda { |name| "Hi #{name}!" }

# Executing the lambda
l.call("foo") # => Hi foo!

Convert SVG polyline to path

Replace all instances of <polyline with <path and points=" with d="M.

 <?xml version="1.0" encoding="utf-8"?>
 <!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
 <svg version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px" width="1000px" height="1000px" viewBox="0 0 1000 1000" enable-background="new 0 0 1000 1000" xml:space="preserve">
-<polyline fill="#FFFFFF" stroke="#000000" stroke-miterlimit="10" points="100.712,141.534 582.904,227.835 425.37,478.521
+

Sans jQuery

Events

// jQuery
$(document).ready(function() {
  // code
})

Rails 3.1 introduced force_ssl. You can add config.force_ssl = true in application.rb.

Rails guide

By enabling force_ssl, Rails send a HSTS (HTTP Strict Transport Security) header which will expired in a year.

So if you enabled force_ssl once, even you change the config value to false later, the browser you used to open you app before will still remember this website (using domain to identify) require to use HTTPS, and redirect you to HTTPS connection automatically. You may use chrome://net-internals/#hsts to check the domain list in Google Chrome.

How to set up stress-free SSL on an OS X development machine

One of the best ways to reduce complexity (read: stress) in web development is to minimize the differences between your development and production environments. After being frustrated by attempts to unify the approach to SSL on my local machine and in production, I searched for a workflow that would make the protocol invisible to me between all environments.

Most workflows make the following compromises:

Use HTTPS in production but HTTP locally. This is annoying because it makes the environments inconsistent, and the protocol choices leak up into the stack. For example, your web application needs to understand the underlying protocol when using the secure flag for cookies. If you don't get this right, your HTTP development server won't be able to read the cookies it writes, or worse, your HTTPS production server could pass sensitive cookies over an insecure connection.
Use production SSL certificates locally. This is annoying

	sudo -i
	cd
	apt-get install build-essential checkinstall && apt-get build-dep imagemagick -y
	wget http://www.imagemagick.org/download/ImageMagick-6.8.7-7.tar.gz
	tar xzvf ImageMagick-6.8.9-1.tar.gz
	cd ImageMagick-6.8.9-1/
	./configure --prefix=/opt/imagemagick-6.8 && make
	checkinstall

	#!/usr/bin/env ruby

	# Script to generate random images. Based on http://www.imagemagick.org/Usage/canvas/#random_blur

	require 'optparse'

	options = {}

	optparse = OptionParser.new do \|opts\|

	======= Prolbem =================================================================================================================
	I have installed : ruby-2.0.0,postgres-9.2 , now in rails app when I execute:

	rake db:create , command I get:

	PG::InvalidParameterValue: ERROR: new encoding (UTF8) is incompatible with the encoding of the template database (SQL_ASCII)
	HINT: Use the same encoding as in the template database, or use template0 as template.
	: CREATE DATABASE "my_db_name" ENCODING = 'unicode'.......

	bin/rake:16:in `load'

	var degrees2meters = function(lon,lat) {
	var x = lon * 20037508.34 / 180;
	var y = Math.log(Math.tan((90 + lat) * Math.PI / 360)) / (Math.PI / 180);
	y = y * 20037508.34 / 180;
	return [x, y]
	}
	//test
	lon= -77.035974
	lat = 38.898717

	<form action="/cart/add" method="post">
	{% if product.variants.size > 1 %}
	{% if product.options[0] %}
	{% assign used = '' %}
	<label for="select-one">{{ product.options[0] }}</label>
	<select id='select-one' onchange="letsDoThis()">
	{% for variant in product.variants %}
	{% unless used contains variant.option1 %}
	<option value="{{ variant.option1 }}">{{ variant.option1 }}</option>
	{% capture used %}{{ used }} {{ variant.option1 }}{% endcapture %}