Learning Go

A collection of various examples of the Go Programming Language.

Trying It

Most of the examples (with the exception of the unit tests) can be run via go run, eg. go run slices/leftrotation.go.

Topics

Slices

• leftrotation.go demostrates two algorithms for rotating an array (or slice, in this case) to the left by an abitrary number of positions. See the /slices directory for more examples with slices.

Bitwise operators

• parity.go determines the parity of the given integer, returning 1 if the number of ones in the binary string is odd, other wise 0 if even. See the /bits directory for more bitwise stuff.

Maps

• twosum.go uses a map to solve the two-sum problem, which is to find which two (if any) numbers in an array sum up to the given total. See the /maps directory for more map shenanigans.

Strings

• compress.go takes a string and compresses it using run-length encoding. See the /strings directory for more string-based functions.

Structs & Interfaces

• operate.go demostrates polymorphism through an abstract Vehicle class vcl.go. Try out eat.go and measure.go to see other examples of the structs in /structs in action.

Goroutines

• race.go will spawn a handful of goroutines to show how concurrency is handled in go. See the /goroutines directory for more.

Channels

• sync.go uses goroutines and channels to wait for responses from two (simulated) external dependencies. See the /channels directory for more on how to use channels in Go.

Unit tests

• sum_test.go demostrates a simple unit test suite. First cd tests, then run go test to run the test file in that directory. Optionally, add the -v flag at the end to get a verbose pass/fail message for each test.