1# dezalgo 2 3Contain async insanity so that the dark pony lord doesn't eat souls 4 5See [this blog 6post](http://blog.izs.me/post/59142742143/designing-apis-for-asynchrony). 7 8## USAGE 9 10Pass a callback to `dezalgo` and it will ensure that it is *always* 11called in a future tick, and never in this tick. 12 13```javascript 14var dz = require('dezalgo') 15 16var cache = {} 17function maybeSync(arg, cb) { 18 cb = dz(cb) 19 20 // this will actually defer to nextTick 21 if (cache[arg]) cb(null, cache[arg]) 22 23 fs.readFile(arg, function (er, data) { 24 // since this is *already* defered, it will call immediately 25 if (er) cb(er) 26 cb(null, cache[arg] = data) 27 }) 28} 29``` 30