Haskell solution for Tanda's Ping (backend) challenge: https://github.com/TandaHQ/work-samples/tree/master/pings%20(backend)
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Install stack and haskell: https://github.com/commercialhaskell/stack/blob/master/doc/install_and_upgrade.md
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Execute program
stack setup
stack build
stack exec pingershv2-exe
# In another terminal
ruby pings.rb