Object.assign + pick

Picks properties from sources into target object.

Install

npm install object-assign-pick

assignPick({target, model, sources})

target The target object — what to apply the sources’ properties to, which is returned after it is modified.

model The properties you want to pick from sources.

sources The source object(s) — objects containing the properties you want to apply.

Usage

const { assignPick } = require('object-assign-pick');
assignPick({
    target: {},
    model: { State: { Name: null }, PrivateIpAddress: null },
    sources: [
        { State: { Code: 0, Name: 'pending'}, PrivateIpAddress: '10.0.0.157', "InstanceType": "t2.micro" },
        { State: { Code: 1, Name: 'terminated'}, PrivateIpAddress: '10.0.0.157', "InstanceType": "t2.micro" }
    ]
});
// expected output: { State: { Name: 'terminated' }, PrivateIpAddress: '10.0.0.157' }

model can be omitted, in which case the shape of target is used to pick properties from sources. If there's is only one source object, then there's no need to enclose it in an array:

assignPick({
    target: {host: 'default-host', port: 443},
    sources: {host: 'example.com'}
})
// expected output: { host: 'example.com', port: 443 }