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Merge two object-like arrays and also merge its array properties (extends underscore.js)
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/** | |
* Created by Nahuel Barrios <barrios.nahuel@gmail.com>. | |
* Created on 20/06/14, at 13:17. | |
*/ | |
var _ = require('underscore'); | |
/** | |
* Merges two object-like arrays based on a key property and also merges its array-like attributes specified in objectPropertiesToMerge. | |
* It also removes falsy values after merging object properties. | |
* | |
* @param firstArray The original object-like array. | |
* @param secondArray An object-like array to add to the firstArray. | |
* @param keyProperty The object property that will be used to check if objects from different arrays are the same or not. | |
* @param objectPropertiesToMerge The list of object properties that you want to merge. It all must be arrays. | |
* @returns The updated original array. | |
*/ | |
function merge(firstArray, secondArray, keyProperty, objectPropertiesToMerge) { | |
function mergeObjectProperties(object, otherObject, objectPropertiesToMerge) { | |
_.each(objectPropertiesToMerge, function (eachProperty) { | |
object[eachProperty] = _.chain(object[eachProperty]).union(otherObject[eachProperty]).compact().value(); | |
}); | |
} | |
if (firstArray.length === 0) { | |
_.each(secondArray, function (each) { | |
firstArray.push(each); | |
}); | |
} else { | |
_.each(secondArray, function (itemFromSecond) { | |
var itemFromFirst = _.find(firstArray, function (item) { | |
return item[keyProperty] === itemFromSecond[keyProperty]; | |
}); | |
if (itemFromFirst) { | |
if (objectPropertiesToMerge) { | |
mergeObjectProperties(itemFromFirst, itemFromSecond, objectPropertiesToMerge); | |
} | |
} else { | |
firstArray.push(itemFromSecond); | |
} | |
}); | |
} | |
return firstArray; | |
} | |
_.mixin({ | |
merge: merge | |
}); |
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