async-handlers

Asynchronous handlers

Function factories for performing synchronous operations after asynchronous operations

transform(fn, callback)

Returns a function (err, result) that can be passed to an asynchronous function that will pass the error through or pass (null, fn(result))

f1 = function (callback) {
  asyncOperation(function(err, result) {
    if (err) {
      callback(err);
    } else {
      callback(null, syncOperation(result);
    }
  }
}

// is equivalent to

var asyncHandlers = require('async-handlers')

f1 = function (callback) {
  handler = asyncHandlers.transform(syncOperation, callback);
  asyncOperation(handler);
}

exitOnError

A function that when called with an error, prints the error in red to stderr and exits with status 1. Otherwise does nothing.

extract(key, callback)

Returns a function (err, result) that can be passed to an asynchronous function that will pass the error through or pass (null, result[key])

Changelog

1.1.2 (2015-07-11)

• add parameter validation

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