Dozens of tracking apps for smartphones are being used or developed to help contain the coronavirus pandemic. But there are worries about privacy and hastily written software.

In this blog post I am introducing tinyCDN, a middle-ware module and a standalone static file server that does much more than others, and it has been designed from the scratch to work on most constrained, Internet of Things, environments, as well as production server.

Update
The awesome Lie function got improved and became an official module (yet 30 lines of code thought). Its name is Dodgy, and it's tested and even more awesome!

Not today though, today is just fine

1. if we are in charge of creating the Promise, we are the only one that could possibly make it abortable and only if we want to, it's an opt in rather than a default or a "boring to write" subclass
2. it's widely agreed that cancellation should be rather synonymous of a rejection, there's no forever pending issue there, just a plain simple rejection
3. one of the Promise strength is its private scope callback, which is inevitably the only place where defining abortability would make sense. Take a request, a timer, an event handler defined inside that callback, where else would you provide the ability to explicitly abort and cleanup the behavior if not there?
4. being the callback the best pace to resolve, reject, and optionally to abort, that's also the very same place we want to be sure that if there was a reason to abort we can pass it along the rejection, so that we could simply ignore it in our optionally abort aware Promises, and yet drop out from any other in the chain whenever the rejection occurs or it's simply ignored
5. the moment we make the promise malleable from the outer world through a p.abort() ability, is also the very same moment we could just decide to resolve, or fully fail the promise via p.resolve(value) or p.reject(error)

var p = new Lie(function (resolve, reject, onAbort) {
  var timeout = setTimeout(resolve, 1000, 'OK');
  // invoking onAbort will explicit our intent to opt-in
  onAbort(function () {
    clearTimeout(timeout);
    return 'aborted'; // will be used as rejected error
                      // it could even be undefined
                      // so it's easier to distinguish
                      // between real errors and aborts
  });
});

p.then(
  console.log.bind(console),
  console.warn.bind(console)
).catch(
  console.error.bind(console)
);

var toTheOuterWorld = p.then(
  function (data) {return data},
  function (error) {return error}
);
// or even ...
var toTheOuterWorld = Promise.resolve(p);

// abortable promise
var cancelable = new Lie(function (r, e, a) {
  var t = setTimeout(r, 5000, 'all good');
  a(function () { clearTimeout(t); });
});

// testing purpose, will it resolve or not?
setTimeout(cancelable.reject, 1000, 'nope');
// and what if we abort before?
setTimeout(cancelable.abort, 750);



// generic promise, let's log what happens
var derived = cancelable.then(
  function (result) { console.log('resolved', result); },
  function (error)  { error ?
    console.warn('rejected', error) :
    console.log('ignoring the .abort() call');
  }
).catch(
  function (error)  { console.error('cought', error); }
);

// being just a Promise, no method will be exposed
console.log(
  derived.resolve,
  derived.reject,
  derived.abort
);

Lie.more = function more(lie) {
  function wrap(previous) {
    return function () {
      var l = previous.apply(lie, arguments);
      l.resolve = lie.resolve;  // optional bonus
      l.reject = lie.reject;    // optional bonus
      l.abort = lie.abort;
      return Lie.more(l);
    };
  }
  if (lie.abort) {
    lie.then = wrap(lie.then);
    lie.catch = wrap(lie.catch);
  }
  return lie;
};

var chainedLie = new Lie(function (res, rej, onAbort) {
  var t = setTimeout(res, 1000, 'OK');
  onAbort(function (why) {
    clearTimeout(t);
    return why;
  });
})
.then(
  console.log.bind(console),
  console.warn.bind(console)
)
.catch(
  console.error.bind(console)
);

// check this out
chainedLie.abort('because');

var justPromise = Promise.resolve(chainedLie);

Not exactly the technical book I've half written already and mentioned last year, put on a garage until few things change in the current ECMAScript specification, yet I've manged to finally publish my JavaScript glossary on demand.

I've written a whole blog post about it, and I can't wait to know your opinions!

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Dewey Library - G156.5.S87 E64 2017

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Rotch Library - G70.212.W55 2017

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Hayden Library - G1896.E24 G46 1897a

Rotch Library - GA108.7.B76 2018

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Dewey Library - HD58.9.B35 2017

Dewey Library - HD53.V55 2017

Dewey Library - HD30.28.P524 2017

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Dewey Library - HD60.5.D44 C674 2020

Dewey Library - HD60.K4822 2019

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Dewey Library - HD60.S223 2018

Merger is about the only solution that the government seems to be capable of thinking up in seeking to get the PSBs into some degree of health

Alter, Adam L., 1980- author

Sumpter, David J. T., 1973- author

Reinhartz, Adele, 1953- author