https://github.com/npm/dezalgo

Contain async insanity so that the dark pony lord doesn't eat souls
https://github.com/npm/dezalgo

npm-cli

Last synced: 20 days ago
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Contain async insanity so that the dark pony lord doesn't eat souls

• Host: GitHub
• URL: https://github.com/npm/dezalgo
• Owner: isaacs
• License: isc
• Created: 2014-06-30T18:55:33.000Z (over 10 years ago)
• Default Branch: main
• Last Pushed: 2023-04-15T20:45:37.000Z (over 1 year ago)
• Last Synced: 2024-11-14T22:07:32.034Z (28 days ago)
• Topics: npm-cli
• Language: JavaScript
• Homepage:
• Size: 332 KB
• Stars: 89
• Watchers: 24
• Forks: 10
• Open Issues: 4
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

Awesome Lists containing this project

• awesome-javascript - dezalgo

README

        
# dezalgo

Contain async insanity so that the dark pony lord doesn't eat souls

See [this blog

post](http://blog.izs.me/post/59142742143/designing-apis-for-asynchrony).

## USAGE

Pass a callback to `dezalgo` and it will ensure that it is *always*

called in a future tick, and never in this tick.

```javascript

var dz = require('dezalgo')

var cache = {}

function maybeSync(arg, cb) {

  cb = dz(cb)

  // this will actually defer to nextTick

  if (cache[arg]) cb(null, cache[arg])

  fs.readFile(arg, function (er, data) {

    // since this is *already* defered, it will call immediately

    if (er) cb(er)

    cb(null, cache[arg] = data)

  })

}

```