miss tyni example with .then().catch()

[maboiteaspam]

TLDR; I believe an example like this should be added to the README,

P().then(function (port) { throw 'boom!';}).catch(console.error)

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Hi,

I ve decided today to start learning promise, i was still stuck into streams ; 0

I would just like to share with you my little experiment to improve the README.

I wrote some shit like this

var Promise = require('promise');

module.exports = function (port, host) {

  var p =  ((port) && Promise.denodeify(function(then){then(null, port)}) ) || require('get-port');

  return p().then(function (port){
    if (!(port).match(/[^:]+:[^:]+/)) port = host + ':' + port;
    return port;
  })
}

Which bugs in if (!(port).match(/[^:]+:[^:]+/)) port = host + ':' + port; because port is an int, but match belong to String.

Anyway, the fact is the error was caught by the promise, and did not produce any output.

So i was kind of like wtf ?! for a while...

Maybe i misread the README and missed something, but i believe it worth to show somewhere something like

P().then(function (port) { throw 'boom!';}).catch(console.error)

just to let me people come in and fail in a friendly way while learning and developing.

[ForbesLindesay]

What you're looking for is .done(). So the example would be:

P().then(function (port) { throw 'boom!';}).done();

.done can also be used instead of .then when you don't plan to do anything with the returned promise. Think of .then like array.map and .done like array.forEach.