Learning Unsung Gotchas of Go - Rashmi Nagpal

Transcript

1. Learning Unsung Gotchas in Go Gopher Artwork by Ashley McNamara Rashmi Nagpal Software Engineering Intern, LoopUp GopherCon Russia
2. Range iterator returns “two values”
4. Defer doesn't work for code blocks, only for the whole function
6. Same Address for Different Zero-sized Variables
8. Iterating through map using “for range”
10. WaitGroup allows the goroutines to cleanly exit before exiting the main program
12. Read and Write Operation Reordering
14. Unmarshalling JSON numbers into interface values
17. Recovering from Panic
20. Map is a reference
23. Data race condition
26. For loop iterators can be reused in go routine
29. Defer calls are executed in LIFO manner
32. Not to use More() to check if there are remaining JSON objects in a stream
35. Non-ASCII punctuation characters aren't supported in struct tags
38. Fork-join model should be handled carefully
41. Deadlock!
44. Bibliography Resources 1. Documentation - The Go Programming Language 2. A Go Gotcha: When Closures and Goroutines Collide 3. Darker Corners of Go – Rytis Biel 4. kstenerud/go-gotchas: Common gotchas with golang and how to work around them Visuals 1. ashleymcnamara/gophers: Gopher Artwork by Ashley McNamara
45. Спасибо
46. QnA