const arrayTest = [

    {name: 'Silver', isMarried: 'Yes'},

    {name: 'Kevin', isMarried: 'Yes'},

    {name: 'Happy', isMarried: 'No'},

    {name: 'Xan', isMarried: 'No'}

]

function isMarried(status) {

    return status === 'Yes'

}

const check = arrayTest.filter(el => isMarried(el.isMarried))

console.log(check)