Transform object: entries > filter > map > reduce (entries > destination object)

transform-object.js

function objectSetEntry(object, [ key, value ]) {

    object[key] = value;

    return object;
}

export default function transformObject(
    source,
    filterEntries = undefined,
    mapEntries = undefined,
    destination = {}
) {

    let entries = Object.entries(source);

    if (filterEntries) {
        entries = entries.filter(filterEntries);
    }

    if (mapEntries) {
        entries = entries.map(mapEntries);
    }

    return entries.reduce(
        objectSetEntry,
        destination
    );
}