A Thrush is any member of the Turdidae family, which includes robins, bluebirds, blackbirds and other small birds.

Thrush is a set of addon functions for Bluebird. The intention is to make it easier for people coming from libraries like async.js to convert their code to use Promises.

Thrush is intended for use with Node.js v0.10.26+. Usage with earlier versions of Node.js, or in other JavaScript environments, is not yet supported.

Thrush includes Bluebird, so all you need to do is something like this:

var Promise = require('thrush');

And you're good to go. Thrush is non-destructive, so you can still use Bluebird on its own if you don't want Thrush's additions elswhere in your code.

Bluebird's API docs describe most of the API that Thrush provides. The rest is documented here, and as jsdoc in the code.

Like Promise.promisify(func, thisObj), except it also works on functions that already return a promise, or return a nodeified promise.

The function passed in must do exactly one of the following:

1. Return a promise.
2. Call a callback.
3. Return a promise that's "nodeified".

If you pass a synchronous function in, it won't work. If your function returns a value that isn't a promise, you'll never have access to that value.

If you pass a 3rd parameter in and it is truthy, the func will be wrapped in a domain, so that any errors thrown deep in the callback chain will be caught and rejected. This is not recommended in general cases, since it's a burden on performance.

safelyPromisify is actually useable as the promisifier function for promisifyAll so you can do something like this:

Promise.promisifyAll(myModule, {promisifier: Promise.safelyPromisify});

Similar to async.series/each.

This operates something like Promise.all, except order is guaranteed, and upon the first rejection/error, execution stops.

Using with an iterator:

Pass in an array of objects to iterate over, and an iterator function. The iterator is like a then function, except the first param the element being iterated, and the second is the resolved value from the previous then block. You can return a value or a promise of a value, and it will be passed to the next iteration as x.

Using without an iterator:

Each array element is assumed to be a function with the same signature as an iterator function would in the previous case. If the array element is not a function, the value is simply passed along to the next array element (which is hopefully a function) as the resolved value.

This is the same as Promise.series, but operates on an array resolved by promise this is being called on.

Similar to async.parallel. Shortcut to Promise.all(arr.map(function(x) { return x(); }));

Similar to async.whilst.

action will be executed repeatedly, as if with Promise.series, until condition returns false, and then the promise will resolve. This will reject if action returns a promise that rejects, or if an error is thrown anywhere.

The MIT License (MIT)

Copyright (c) 2014 DeNA Co., Ltd.

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