Created
November 20, 2014 07:03
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'use strict'; | |
var util = require('util'); | |
var randomInt = function (low, high) { | |
return Math.floor(Math.random() * (high - low) + low); | |
}; | |
var find = function (key, object, callback) { | |
console.log('----------------'); | |
console.log('In find function'); | |
object.forEach(function (element) { | |
setImmediate(function () { | |
console.log('Trying to find key: %s in %s', key, util.inspect(element, {depth: null})); | |
if (element.key === key) { | |
console.log('Key found!: %s, value: %s', key, element.val); | |
callback(null, true, element.val); | |
} // else { | |
// console.log('Key not found!: %s, %s', key, element.key); | |
// callback(new Error('Key not found!'), false); | |
// } | |
}); | |
}); | |
console.log('Exiting from find function'); | |
console.log('--------------------------'); | |
}; | |
var getValue = function (key, obj, callback) { | |
var delay = randomInt(300, 1500); | |
console.log('Start getVal "' + key + '", delay ' + delay + 'ms'); | |
setTimeout(function () { | |
// Find key there | |
find(key, obj, function (err, result, val) { | |
if (result) { | |
callback(null, val); | |
} else { | |
console.error(err); | |
} }); | |
}, delay); | |
console.log('End getVal "' + key + '", delay ' + delay + 'ms'); | |
}; | |
var getKey = function (map, callback) { | |
console.log('In getKey function'); | |
var keys = Object.keys(map); | |
keys.forEach(function (key) { | |
setImmediate(function () { | |
callback(null, key); | |
}); | |
}); | |
console.log('Exit getKey function'); | |
}; | |
var transformAsync = function (objects, map, callback) { | |
var counter = 0; | |
console.log('Function transformAsync is started.'); | |
console.log('-----------------------------------'); | |
getKey(map, function (err, key) { | |
if(typeof map[key] === 'object') { | |
getKey(map[key], function (err, nestedKey) { | |
counter++; | |
getValue(map[key][nestedKey], objects, function (err, value) { | |
map[key][nestedKey] = value; | |
if (--counter === 0) callback(null, map); | |
}); | |
}); | |
} else { | |
counter++; | |
getValue(map[key], objects, function (err, value) { | |
console.log('Key is: "%s", Value is: "%s"',key, value); | |
map[key] = value; | |
if (--counter === 0) callback(null, map); | |
}); | |
} | |
}); | |
console.log('------------------------'); | |
console.log('Function async is ended.'); | |
}; | |
transformAsync(require('./data.json'), require('./map.json'), function (err, map) { | |
console.log('------ RESULT ------'); | |
console.log(util.inspect(map, {depth: null})); | |
console.log('----- SUCCESS! -----'); | |
}); |
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