Questions
Go questions
Choose a question page, learn the concept, then test your understanding with a quiz.
How to Convert a Unix Timestamp to time.Time in Go
Learn how to convert Unix timestamps to time.Time in Go using time.Unix, why time.Parse fails, and common mistakes to avoid.
How to Convert an int to a String in Go
Learn how to convert an int to a string in Go using strconv.Itoa and FormatInt, and why string(i) gives a character instead of digits.
How to Convert float64 to int in Go
Learn how to convert float64 to int in Go using type conversion, truncation rules, examples, mistakes, and practical use cases.
How to Declare a Constant Array or Slice in Go
Learn how to declare fixed data in Go, why const arrays are not allowed, and how to use arrays, slices, and variables correctly.
How to Delete a Key from a Map in Go
Learn how to remove entries from a Go map using delete(), with examples, common mistakes, and practical map usage patterns.
How to Delete an Element from a Slice in Go
Learn how to delete an element from a slice in Go using append, slicing, and index checks with simple examples and common mistakes.
How to Disable or Bypass go test Caching in Go
Learn how go test caching works in Go and how to force tests to run again using practical commands and examples.
How to Find the Type of an Object in Go
Learn how to inspect variable types in Go using reflect.TypeOf, %T, and type assertions with clear examples for beginners.
How to Format Time in Go Using yyyyMMddHHmmss
Learn how to format the current time in Go as yyyyMMddHHmmss using Go's reference time layout with clear examples and common mistakes.
How to Format a String in Go Without Printing
Learn how to format and return strings in Go using fmt.Sprintf, with examples, comparisons, common mistakes, and a mini project.
How to Generate a Random String of Fixed Length in Go
Learn how to generate fixed-length random letter strings in Go using simple, fast, and beginner-friendly techniques.
How to Get a Slice of Map Keys in Go
Learn how to collect map keys into a slice in Go, why iteration is required, and common patterns for sorting and using keys safely.
How to Get the Last Element of a Slice in Go
Learn the Go way to get the last element of a slice, handle empty slices safely, and avoid common indexing mistakes.
How to Handle Configuration in Go
Learn practical ways to handle configuration in Go using flags, environment variables, and config files with clear examples and patterns.
How to Handle HTTPS Requests with Invalid Certificates in Go
Learn how to make HTTPS requests in Go when a certificate is invalid, including custom trust, TLS config, and safe alternatives.
How to Handle JSON POST Requests in Go
Learn the correct way to read and decode JSON POST request bodies in Go using net/http and encoding/json.
How to Handle Unused Variables and Imports in Go
Learn why Go reports unused variables and imports, how to fix them, and practical ways to work efficiently while developing Go code.
How to Import Local Packages in Go
Learn how local package imports work in Go, why relative imports fail, and how to fix GOPATH and module-based imports correctly.
How to Initialize an Empty Slice in Go
Learn the correct way to initialize an empty slice in Go using make([]T, 0) or []T{}, with examples, differences, and best practices.
How to Install a Package with go get in Go
Learn how to use go get correctly in Go, including GitHub package paths, GOPATH basics, common mistakes, and practical examples.