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30 lines
651 B
30 lines
651 B
3 years ago
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# dezalgo
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Contain async insanity so that the dark pony lord doesn't eat souls
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See [this blog
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post](http://blog.izs.me/post/59142742143/designing-apis-for-asynchrony).
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## USAGE
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Pass a callback to `dezalgo` and it will ensure that it is *always*
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called in a future tick, and never in this tick.
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```javascript
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var dz = require('dezalgo')
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var cache = {}
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function maybeSync(arg, cb) {
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cb = dz(cb)
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// this will actually defer to nextTick
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if (cache[arg]) cb(null, cache[arg])
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fs.readFile(arg, function (er, data) {
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// since this is *already* defered, it will call immediately
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if (er) cb(er)
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cb(null, cache[arg] = data)
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})
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}
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```
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