Andrew White pixeltrix

Generate a Ruby function to convert UK Ordnance Survey OSGB36 co-ordinates to WGS84 latitude and longitude just using pure Ruby and not using a gem.

Generate a Ruby function to convert UK Ordnance Survey OSGB36 co-ordinates to WGS84 latitude and longitude

Generate a Ruby on Rails routes file that namespaces a resource called 'Page' under the path '/admin' and restrict it to just the index, edit and update actions.

Generate a Ruby on Rails controller for a 'Page' resource that is namespaced inside a module called 'Admin'. Implement the index, edit and update actions using path parameter called 'slug' to find the correct model. For the index action sort the pages by the slug column.

	def osgb36_to_wgs84(easting, northing)
	# Ellipsoid parameters
	a_airy = 6377563.396 # Semi-major axis (Airy 1830)
	b_airy = 6356256.909 # Semi-minor axis (Airy 1830)
	a_wgs84 = 6378137.0 # Semi-major axis (WGS84)
	b_wgs84 = 6356752.3142 # Semi-minor axis (WGS84)

	# OSGB36 Helmert transformation parameters to WGS84
	tx = 446.448 # Translation along X-axis (meters)
	ty = -125.157 # Translation along Y-axis (meters)

	module Mapping
	module Utilities
	module NationalGrid
	# All the values and formula are from the Ordnance Survey publication:
	# A guide to coordinate systems in Great Britain
	# https://www.ordnancesurvey.co.uk/documents/resources/guide-coordinate-systems-great-britain.pdf

	# Scale factor on the central meridian for the Transverse Mercator projection
	# https://en.wikipedia.org/wiki/Transverse_Mercator_projection
	F0 = 0.9996012717

	class ActivationsController < ApplicationController

	respond_to :json

	def create
	new_password = params[:user] && params[:user][:password]
	token = params[:confirmation_token]

	if !new_password
	render_errors({"password"=>["can't be blank"]}.to_json)

	formats = [
	"[A-Z]{2}[0-9]{2}[A-Z]{3}",
	"[A-Z]{1}[0-9]{3}[A-Z]{3}",
	"[A-Z]{3}[0-9]{3}[A-Z]{1}"
	]

	pattern = /\A#{formats.join("\|")}\z/

	candidates = %w[
	RF10AK0