Golang

1. 1

   Hello, Go

   Package mainImportFunc mainFmt.PrintlnGo run
   25 min
2. 2

   Variables and Types

   Var declarationShort declaration :=IntFloat64StringBool+2
   25 min
3. 3

   Control Flow: if and for

   IfElse ifElseFor loopFor as whileInfinite for+2
   30 min
4. 4

   Functions

   Func keywordParametersReturn valuesMultiple return valuesNamed return valuesBlank identifier
   30 min
5. 5

   Slices and Maps

   Slice literalAppendLenIndexingRangeMap literal+2
   35 min
6. 6

   Tiny CLI Capstone

   Os.ArgsStrconv.AtoiError handling with if err != nilOs.ExitGo buildPutting it together
   40 min
7. 7

   Structs and Pointers

   Struct definitionField accessZero values for structsPointer types& and * operatorsPointer receivers vs value receivers+1
   35 min
8. 8

   Methods and Interfaces

   Method declarationReceiver typesPointer vs value receiversInterface definitionImplicit interface satisfactionSmall interfaces+1
   35 min
9. 9

   Error Handling

   Error interfaceFmt.Errorf with %wErrors.IsErrors.AsCustom error typesPanic vs error+1
   35 min
10. 10

    Goroutines and Channels

    The go keywordGoroutine lifetimeUnbuffered channelsBuffered channelsSend and receiveRange over channel+1
    40 min
11. 11

    Concurrency Patterns

    Select statementContext.Context for cancellationSync.WaitGroupSync.MutexWorker pool patternFan-out fan-in idea
    45 min
12. 12

    A Tour of the Standard Library

    FmtStringsStrconvTimeOsBufio+1
    40 min
13. 13

    Testing and Benchmarks

    Go testTesting.TTable-driven testsT.Run subtestsTesting.B benchmarks_test.go file naming+1
    40 min
14. 14

    Modules and Project Structure

    Go mod initGo.mod and go.sumImport pathsPackage vs moduleInternal/ folderCmd/ layout+1
    35 min
15. 15

    HTTP Servers

    Net/httpHttp.HandleFuncHttp.ServerJSON responsesRequest routingMiddleware via http.Handler wrapping+1
    45 min
16. 16

    Databases with database/sql

    Database/sql packageDriver importsSql.Open and sql.DB poolExec vs Query vs QueryRowPrepared statementsScanning rows+1
    45 min
17. 17

    Generics

    Type parameters with [T any]ConstraintsComparableTilde approximation ~intGeneric Map and FilterWhen generics help, when they do not
    35 min
18. 18

    Performance and Profiling

    Go test -benchPprof CPU and heap profilesEscape analysis with -gcflags=-mAvoiding unnecessary allocationsPreallocating slicesSync.Pool intuition
    40 min
19. 19

    Design Patterns in Go

    Functional options patternRepository patternDependency injection via interfacesContext propagation through call stacksConstructor functions
    40 min
20. 20

    Deployment and Production

    CGO_ENABLED=0 static binariesCross-compile with GOOS and GOARCHGraceful shutdown with http.Server and signal.NotifyContextMinimal Dockerfile with scratch or distrolessReading config from environment variables
    45 min

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