Creat Array Of Json Objects From Mulitple Objects Using Linq.js

I have a JSON array like so: var jsonArray = [ { Date: '2010-02-25', Size:'Large', Type:'a', Value: '100'}, { Date: '2010-02-25', Size:'Medium', Type:'a', Value: '160'},

Solution 1:

Here's one way to accomplish this:

var jsonArray = [
    { Date: "2010-02-25", Size:"Large", Type:"a", Value: "100"},
    { Date: "2010-02-25", Size:"Medium", Type:"a", Value: "160"},
    { Date: "2010-02-25", Size:"Small", Type:"a", Value: "200"},
    { Date: "2010-02-25", Size:"Large", Type:"b", Value: "400"},
    { Date: "2010-02-25", Size:"Medium", Type:"b", Value: "120"},
    { Date: "2010-02-25", Size:"Small", Type:"b", Value: "170"}
];

functionmakeGroupKey(item) {
    returnJSON.stringify({
        Date: item.Date,
        Type: item.Type
    });
}

functionmergeItems(items) {
    return items.Aggregate(JSON.parse(items.Key()), function (prev, next) {
        prev[next.Size] = next.Value;
        return prev;
    });
}

var result = Enumerable.From(jsonArray)
    .GroupBy(makeGroupKey)
    .Select(mergeItems)
    .ToArray();

console.log(result);

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