sum = Neos.Fusion:Reduce {
    items = ${ __array_of_products__ }
    initialValue = 0
    itemReducer = ${carry + item.price}
}

cheapest = Neos.Fusion:Reduce {
    items = ${ __array_of_products__ }
    initialValue = null
    itemReducer = ${(!carry || carry.price > item.price) ? item : carry}
}

filtered = Neos.Fusion:Reduce {
    items = ${ __array_of_products__ }
    initialValue = ${[]}
    itemReducer = ${(item.price > 99) ? Array.push(carry, item) : carry}
}

#
# This requires new Array.set methods
#
grouped = Neos.Fusion:Reduce {
    items = ${ __array_of_products__ }
    initialValue = ${[]}
    itemReducer = News.Fusion:Value {
        groupName = ${item.group}
        groupCarry = ${carry[ this.groupName ] || []}
        groupValue = ${Array.push(this.groupCarry, item)}
        value = ${ Array.set(carry, this.groupName, this.groupValue) }
    }
}