learning-go

Learning go programming by completing default programs present in go documentation and reading Learning Go book.

Go documentation

This contains two modules - hello and greetings. Hello imports greetings module to return random greetings according to input. More info - https://golang.org/doc/tutorial/greetings-multiple-people

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Learning Go: An idiomatic approach to real world Go programming

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Chapter 1 - Go Basics

Effective Go - https://go.dev/doc/effective_go

Code review comments - https://github.com/golang/go/wiki/CodeReviewComments

Linting - golangci-lint - https://golangci-lint.run/usage/quick-start/

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Chapter 2 - Primitive types

• Can be declared using var and :=.

    var x int = 10
    var x, y = 10, "hello"

• := can be used only in a function. We can assign a new value to a variable by using := untill there is a new variable on the left hand side.

    x := 10
    x, y := 30, 20

• By default zero value is assinged to the variable. Also prefer using var form when assigning a type of variable

    var x int
    x := byte(20) // This is valid but to idiomatic.
    var x byte = 20 // This is idiomatic

• Rarely declare variables outside of functions (i.e. in package block). It makes data flow analysis complicated.
• It is allowed to create unread package level variables.
• There can be unread const as they are only used during compile time and wont be included in binary.
• camel case is preferred while naming variables. Also keep the name short for variables declared inside a function. One letter can be used as well like - f for float, i for int, b for boolean.