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zerokarmaleft/clj_lab.rb

Created September 26, 2011 18:07
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accessing clojure's PersistentHashMap from jruby
Raw
clj_lab.rb
require 'java'
require 'clojure'
module Clojure
include_package 'clojure.lang'
end
foo = Clojure::PersistentHashMap.create(:a, 1)
# => {:a=>1}
foo.assoc(:e, 5)
# => {:a=>1, :e=>5}
foo
# => {:a=>1}
bar = Clojure::PersistentHashMap.create(:b, 2, :c, 3)
# => {:b=>2, :c=>3}
foobar = Clojure::PersistentHashMap.create(foo.merge(bar))
# => {:a=>1, :b=>2, :c=>3}
foobar.invoke(:c)
# => 3
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