[Javascript Crocks] Safely Access Nested Object Properties with `propPath`

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In this lesson, we’ll look at the propPath utility function. We’ll ask for a property multiple levels deep in an object and get back a Maybe. We’ll get a Just when the property exists at our path and a Nothing if any part of the path is undefined.

 

const propPath = require(‘crocks/Maybe/propPath‘)const user = {    username: ‘tester‘,    email: ‘[email protected]‘,    address: {        street: ‘111 E. West St‘,        city: ‘Anywhere‘,        state: ‘PA‘,        postalCode: ‘19123-4567‘    }};const getPostalCode = propPath([‘address‘, ‘postalCode‘]);const zip = getPostalCode(user).option(‘not available‘);console.log(zip) //‘19123-4567‘

 

[Javascript Crocks] Safely Access Nested Object Properties with `propPath`