projects

// advisable-example.js
var advisable = require('advisable');

var arithmetic = {
  add: function (x, y) {
    console.log('arithmetic.add');
    return x + y;
  }
};

var logBefore = function (x, y) {
  console.log('before, args => x: %d, y: %d', x, y);
};

var logAfter = function (x, y) {
  console.log('after, args => x: %d, y: %d', x, y);
};

// Mix in advice behavior
advisable.sync.call(arithmetic);

// Demonstrate before and after logging with around advice
arithmetic.aroundSync('add', logBefore, logAfter);

// Perform the addition
z = arithmetic.add(2, 3);

// Given an async db api:
//
//   db.find(id, callback)
//
// And an async data aggregation function
//
//   aggregate(x, y, z, callback);

var invoke = require('invoke')
  , db = require('db')
  , aggregate = require('aggregate');

// Fetch three records in parallel, then aggregate

invoke(function (initial, callback) {

  db.find('id-0', callback);

}).and(function (initial, callback) {

  db.find('id-1', callback);

}).and(function (initial, callback) {

  db.find('id-2', callback);

}).then(function (results, callback) {

  aggregate(results[0], results[1], results[2], callback);

}).rescue(function (err) {

   // Handle any errors by logging to console
  console.error(err);

}).end(null /* initial data */, function (result) {

  // Log result
  console.log('result: %d', result);

});