onerr

Simple error handling utility function

How to install

npm install onerr

Usage

$3

This module allows you to replace the common ideom

function doSomethingAsync(arg, callback) {
// [...]
goFetchSomethingAsync(arg, function(err, data) {
if (err != null) {
return callback(err);
}
// Do something with data
});
}

with

var onerr = require("onerr");

function doSomethingAsync(arg, callback) {
// [...]
goFetchSomethingAsync(arg, onerr(callback, function(data) {
// Do something with data
}));
}

$3

It looks even nicer in CoffeeScript:

onerr = require "onerr"

middlewareFunction = (req, res, next) ->
# [...]
goFetchSomethingAsync req, onerr next, (data) ->
# Do something with data