まず直列実行するプログラムを書く 1秒待つコマンド 2秒待つコマンド 3秒待つコマンド 上記を順番に実行していくプログラムを main.cr の中身を書く。 つまり、合計で6秒かかってしまう。 require "logger" log = Logger.new(STDOUT) log.info "started." # 1秒かかるコマンド log.info "sleep1 started." sleep 1 log.info "sleep1 finished." # 2秒かかるコマンド log.info "sleep2 started." sleep 2 log.info "sleep2 finished." # 3秒かかるコマンド log.info "sleep3 strated." sleep 3 log.info "sleep3 finished." log.info "all fi
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