programthis

class CreatePlaces < ActiveRecord::Migration
#  Rails migration for GeoWorldMap db into postgresql db
#(inspired by http://blog.inspired.no/populate-your-database-with-free-world-cities-countries-regions-in-2-minutes-using-a-rails-migration-273/ post)

#extract files from GeoWorldMap.zip archive from here
#  http://www.geobytes.com/GeoWorldMap.zip
#
#and place them into #{Rails.root}/db/migrate/
##the archive has 'cities.txt' file, rename it 'Cities.txt'
#mv cities.txt Cities.txt

programthis

List()
var list = Immutable.List([1,2,3])
// [1, 2, 3]

List.isList()
Immutable.List.isList(list)
// true

List.of()
var list = Immutable.List.of(1,2,3);