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• Simultaneous Runners

  In the Go language, program parts that run simultaneously synchronize and communicate natively via channels. Mike Schilli whips up a parallel web fetcher to demonstrate the concept.

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• Rat Rac

  If program parts running in parallel keep interfering with each other, you may have a race condition. Mike Schilli shows how to instruct the Go compiler to detect these conditions and how to avoid them in the first place.

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• Fighting Chaos

  When functions generate legions of goroutines to do subtasks, the main program needs to keep track and retain control of ongoing activity. To do this, Mike Schilli recommends using a Context construct.

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• Motion Sensor

  Inotify lets applications subscribe to change notifications in the filesystem. Mike Schilli uses the cross-platform fsnotify library to instruct a Go program to detect what's happening.

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• Progress by Installments

  Desktop applications, websites, and even command-line tools routinely display progress bars to keep impatient users patient during time-consuming actions. Mike Schilli shows several programming approaches for handwritten tools.

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