https://github.com/twlite/ruby-signal-test

https://github.com/twlite/ruby-signal-test

Last synced: about 1 month ago
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• Host: GitHub
• URL: https://github.com/twlite/ruby-signal-test
• Owner: twlite
• Created: 2024-07-20T18:53:16.000Z (4 months ago)
• Default Branch: main
• Last Pushed: 2024-07-20T18:56:06.000Z (4 months ago)
• Last Synced: 2024-09-20T00:28:04.751Z (about 2 months ago)
• Language: Ruby
• Size: 2.93 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
```rb

STORE = []

def createSignal(defaultValue)

  value = defaultValue.is_a?(Proc) ? defaultValue.call() : defaultValue

  subs = []

  

  get = ->() {

    sub = STORE.last

    subs << sub if sub && !subs.include?(sub)

    value

  }

  

  set = ->(val) {

    value = val.is_a?(Proc) ? val.call(value) : val

    subs.each { |s| s.call() }

  }

  

  [get, set]

end

def createEffect(fn)

  exec = ->() {

    STORE.push(exec)

    begin

      fn.call()

    ensure

      STORE.pop()

    end

  }

  exec.call()

end

count, set_count = createSignal(0)

createEffect(->() {

  puts("The count is #{count.call()}")

})

# The count is 0

set_count.call(count.call + 1) # The count is 1

set_count.call(count.call + 1) # The count is 2

set_count.call(count.call + 1) # The count is 3

set_count.call(count.call + 1) # The count is 4

set_count.call(count.call + 1) # The count is 5

```