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Replacing keys by values according to some predefined object in javascript

I have an object having key-value pairs. Another array has only a partial set of keys. I want a third array that contains only values and that too only for those keys which are present in the second array.

let x= {'Hello':'Monday', 'World':'Tuesday', 'Program':'Wednesday'}
let y = ['Program','Hello']

What I require in output is : y=['Wednesday', 'Monday']

Solution

  • Try This

    let x= {'Hello':'Monday', 'World':'Tuesday', 'Program':'Wednesday'}
let y = ['Program','Hello']

console.log(y.map(val => x[val]));