Master goroutines, channels, interfaces, and Go idioms with practical coding scenarios
Start Practicing NowMaster goroutines, channels, select statements, and sync primitives
Understand Go's interface system and composition over inheritance
Learn Go idioms, error handling, and writing idiomatic Go code
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Goroutines and concurrency patterns
Channels and select statements
Interfaces and composition
Error handling and defer/panic/recover
Go standard library essentials
Testing and benchmarking
A: Goroutines are lightweight, managed by Go runtime (not OS). Start with 2KB stack (grows/shrinks), threads have fixed 1-2MB stack. Millions of goroutines possible, thousands of threads. Go scheduler multiplexes goroutines onto OS threads (M:N model). Goroutines communicate via channels, threads use shared memory + locks.
A: Channels enable goroutine communication. Unbuffered: sender blocks until receiver ready (synchronous). Buffered: sender blocks only when full, receiver blocks when empty. Create: ch := make(chan int) or make(chan int, 10). Close with close(ch). Use select for multiple channel operations.
A: Defer schedules function call to execute after surrounding function returns, regardless of how it exits (normal return or panic). Executes in LIFO order. Common uses: closing files, unlocking mutexes, cleanup. Example: defer file.Close() ensures file closes even if panic occurs.
A: Go uses explicit error return values, not exceptions. Functions return (result, error). Check errors: if err != nil. Custom errors implement error interface. For unrecoverable errors, use panic/recover (rare). This makes error handling explicit and visible in code flow.
Master goroutines, channels, and the select statement for concurrency
Understand interfaces and the empty interface interface{}
Know when to use pointers vs values for function parameters and receivers
Practice with Go's standard library: http, json, context packages
Understand Go's workspace, modules, and dependency management with go mod
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