// Bad practice file, _ := os.Open("example.txt")
"100 Go Mistakes and How to Avoid Them" is an indispensable guide for any developer looking to move from writing "code that works" to "code that is robust, efficient, and maintainable." By identifying these 100 mistakes, Teiva Harsanyi provides a roadmap to intermediate and advanced Go mastery.
Go has a relatively simple syntax, but it's still possible to make mistakes that can lead to bugs, performance issues, or even crashes. Here are some of the most common mistakes Go developers make:
Implementing methods with pointer receiver inconsistently. Fix: choose pointer/value consistently depending on mutation/size. 100 Go Mistakes And How To Avoid Them Pdf Download
Not setting correct permissions for files and sockets. Fix: use least privilege (chmod, chown).
Not rotating credentials or failing to expire tokens. Fix: implement rotation and expiry policies.
Sharing variables across goroutines without explicit synchronization. Avoidance: Use the -race flag ( go test -race . ) and prefer communication via channels over shared memory. // Bad practice file, _ := os
for i := 0; i < 10; i++ go func() fmt.Println(i) // All goroutines may print "10" ()
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Improper use of timer.Reset or dangling pointers. 5. Standard Library and Testing Not rotating credentials or failing to expire tokens
// Good practice if errors.Is(err, fooError{}) // code
Not running go vet and static linters (gofmt, golint, staticcheck). Fix: include linters in CI.
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