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yelouafi/stream-map.js

Last active August 29, 2015 14:25
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stream-map.js
// map : (Stream a, a -> b) -> Stream b
Stream.prototype.map = function(f) {
return this.isEmpty || this.isAbort ? this
: this.isCons ? Stream.Cons(f(this.head), this.tail.map(f))
: Stream.Future(
this.promise.then(
s => s.map(f),
err => Stream.Abort(err)))
Stream.seq([1,2,3], 0, 1000).map(x => x+1).log('seq')
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