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function delay(ms) { | |
var d = Promise.defer(); | |
setTimeout(function() { | |
d.resolve(); | |
}, ms); | |
return d.promise; | |
} | |
/* ACLARACION: NO usar en produccion, codigo de prueba de concepto, no tiene tests, | |
nisiquiera se testeo a fondo manualmente */ | |
/* Este codigo es una modificacion de Q.async definida aca: https://github.com/kriskowal/q/blob/v1/q.js#L1280, | |
para que no dependa de Q */ | |
function async(makeGenerator) { | |
return function () { | |
function continuer(verb, arg) { | |
var result; | |
try { | |
result = generator[verb](arg); | |
} catch (exception) { | |
return Promise.reject(exception); | |
} | |
if (result.done) { | |
return Promise.resolve(result.value); | |
} else { | |
if (result.value && result.value.then) { | |
return result.value.then(callback, errback); | |
} else { | |
return Promise.resolve(result.value).then(callback, errback); | |
} | |
} | |
} | |
var generator = makeGenerator.apply(this, arguments); | |
var callback = continuer.bind(continuer, "next"); | |
var errback = continuer.bind(continuer, "throw"); | |
return callback(); | |
}; | |
} | |
// crea una promise, que se resuelve despues de 1 segundo | |
var prm = async(function*(name) { | |
console.log("promise " + name + " started"); | |
yield delay(1000); | |
console.log("promise " + name + " resolved"); | |
return name.length; | |
}); | |
var z = async(function*() { | |
var x = yield prm("xxxx"); | |
var y = yield prm("yyy"); | |
var result = x + y; | |
console.log("result: " + result); | |
process.exit(); | |
}); | |
z(); |
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