https://github.com/oldratlee/my-go-playground

🦫 my Go playground
https://github.com/oldratlee/my-go-playground

channel go goroutine panic playground rune slice string

Last synced: over 1 year ago
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🦫 my Go playground

• Host: GitHub
• URL: https://github.com/oldratlee/my-go-playground
• Owner: oldratlee
• Created: 2023-01-20T14:01:06.000Z (over 3 years ago)
• Default Branch: main
• Last Pushed: 2023-01-30T11:20:51.000Z (over 3 years ago)
• Last Synced: 2025-03-06T10:03:03.246Z (over 1 year ago)
• Topics: channel, go, goroutine, panic, playground, rune, slice, string
• Language: Go
• Homepage: https://github.com/oldratlee/my-go-playground
• Size: 21.5 KB
• Stars: 0
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

          
# 🦫 my Go playground

My Go playground while learning Go. 🧑‍🚒  

so be cautious that the codes is not sophisticated and may not follow the best practice.

Run playground simply by `go test`: 🚀

```sh

go test ./...

```

## 🛝 Playground List

- [`nil_empty_playground.go`](internal/nil_empty_playground.go) | [`nil_empty_playground_test.go`](internal/nil_empty_playground_test.go)

  - check the behavior of `nil`/empty slice

  - check the behavior of `nil`/empty map

    - put new elements into nil map, PANIC!

  - check the behavior of `nil` function/lambda

    - call nil function/lambda, PANIC!

- [`string_playground.go`](internal/string_playground.go) | [`string_playground_test.go`](internal/string_playground_test.go)

  - check the difference between `len` and `rune count` of string

  - conversion of

    - `string` <=> `[]rune`

    - `rune` => `string`

    - `string` <=> `[]byte`

    - `byte` => `string`

    - `[]rune` <=> `[]byte`

  - string iteration

    - `for-range` loop iteration return RUNE value with BYTE index, NOT return byte value,  

      make mistakes very easily, need caution!

    - iterate with byte index only of string by `for-range` loop, lose bytes! NONSENSE!!

  - check memory struct of string by `SizeOf`

- [`goroutine_channel_playground.go`](internal/goroutine_channel_playground.go) | [`goroutine_channel_playground_test.go`](internal/goroutine_channel_playground_test.go)

  - read channel by `for-range` loop, very convenient

  - read channel by `comma-ok` pattern, more tedious but safe too

- [`goroutine_channel_pattern_playground.go`](internal/goroutine_channel_pattern_playground.go) | [`goroutine_channel_pattern_playground_test.go`](internal/goroutine_channel_pattern_playground_test.go)

  - operation(read/write) to multiply channels with `select statement` avoid starvation/deadlock

  - `done channel pattern` aka. a channel only used to publish close event

  - `cancel function pattern` to terminate a goroutine

  - `nilify the case channel pattern` to turning off a case in a select

  - `time after case pattern` to time out code

- [`when_go_runtime_panic_playground.go`](internal/when_go_runtime_panic_playground.go) | [`when_go_runtime_panic_playground_test.go`](internal/when_go_runtime_panic_playground_test.go)

  - `array operation` panic

  - `slice operation` panic

  - `channel operation` panic

  - `function value operation`, call nil function value panic

  - call `value receiver method` with nil point receiver panic

  - call `method of nil interface` panic

  - call `method of interface with nil value` panic

  - `pointer operation`, dereference a nil pointer panic

  - `type assertions` panic

## 😈 My common functions and go design experiments

- [`commons.go`](internal/commons.go)

  - in my personal opinion,  

    `type voidT = struct{}` and `var void = voidT{}`  

    definitions seems interesting and COOL