Explore Go patterns and tradeoffs through concrete examples and debugging lessons, from goroutines and context cancellation to profiling and memory use.
25 articles · by Niko Minadze
Represent and transform data safely
Use a map-backed pass to keep the first occurrence of each comparable value, an equality function for other values, or sorting and compacting when order can change.
Read articleRepresent and transform data safely
Use `slices.Index` for the first matching position, `slices.Contains` for membership, and a loop when a predicate defines the match.
Represent and transform data safely
Use a range loop for a straightforward `[]int` total, or a third-party reducer when the callback makes a more varied calculation easier to express.
Represent and transform data safely
Find the largest value in a Go slice with a one-pass loop or slices.Max, while making empty-input behavior explicit.
Represent and transform data safely
Use sort.Slice for a one-off descending comparison, or define sort.Interface when the ordering is worth reusing.
Verify behavior and measure performance
Use Go 1.27’s experimental portable SIMD API for an in-place subtraction loop, check every tail length, and benchmark it against scalar Go.
Represent and transform data safely
Use a type assertion to retrieve a string held by an interface, or fmt to produce a textual representation of another value.
Verify behavior and measure performance
Compare equivalent work, measure the metric behind your decision, and record enough about the setup to explain both results and surprises.
Set up and maintain Go projects and tooling
Run a test to fetch dependencies it needs, use go mod download to prefetch modules, and inspect the cache location with go env.
Represent and transform data safely
If an interface requires a pointer-receiver method, pass a pointer to the struct: the struct value itself does not satisfy that interface.
