The essential Go Programming cheat sheet: 7 concise chapters you can read in minutes, distilled from the full deck. When you're ready, drill the flashcards or test yourself under exam conditions.
Go (often called Golang) is an open-source, statically typed, compiled language developed at Google by Robert Griesemer, Rob Pike, and Ken Thompson. It is designed around simplicit...
Read full chapter →Slices are the most common composite type in Go. A slice is a flexible, dynamically sized view into an underlying array, and its declaration []int{1, 2, 3} creates one with both le...
Read full chapter →Functions in Go are first-class values: they can be assigned to variables, passed as arguments, returned from other functions, and stored in maps. A variadic parameter func sum(num...
Read full chapter →Go deliberately avoids exceptions in favor of explicit error returns. Functions that can fail return an error as their last result, and callers are expected to handle it immediatel...
Read full chapter →Goroutines are Go's lightweight concurrency primitive. The go keyword starts a function as a goroutine that is multiplexed onto OS threads by the Go runtime, and each starts with o...
Read full chapter →Go's I/O model centers on two interfaces: io.Reader with Read(p []byte) (n int, err error) and io.Writer with Write(p []byte) (n int, err error). Files, network connections, buffer...
Read full chapter →Testing is a first-class concern in Go. Test files end in _test.go and import the testing package; tests are functions named TestXxx(t *testing.T) and are run with go test ./.... F...
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