[рони]

<pre>

    <script>
        let allData = [{
                idStandard: 1278,
                valueDecNew: 8
            },
            {
                idStandard: 1279,
                valueDecNew: 3
            },
            {
                idStandard: 1280,
                valueDecNew: 6
            },
            {
                idStandard: 1284,
                valueDecNew: 56
            }
        ]

        let params = [{
                idStandard: 1278,
                valueDecNew: 0
            },
            {
                idStandard: 1279,
                valueDecNew: 0
            },
            {
                idStandard: 1282,
                valueDecNew: 0
            }
        ]

        let arr = params.map(function(x) {
            return x.idStandard
        });
        let allfilter = allData.filter(function(x) {
            return arr.indexOf(x.idStandard) === -1
        })

        let result = params.concat(allfilter).sort(function(a, b) {
    return a.idStandard - b.idStandard
})

        document.write(JSON.stringify(result, "", 1))
    </script> </pre>