More efficient way to extract address components

Question

Currenty, I\'m using the following code to get the country, postal code, locality and sub-locality:

var country, postal_code, locality, sublocality;
for (i =         


        

Answer 1

My one-liner using a functional approach and map, filter, and ES2015:

/**
 * Get the value for a given key in address_components
 * 
 * @param {Array} components address_components returned from Google maps autocomplete
 * @param type key for desired address component
 * @returns {String} value, if found, for given type (key)
 */
function extractFromAddress(components, type) {
    return components.filter((component) => component.types.indexOf(type) === 0).map((item) => item.long_name).pop() || null;
}

Usage:

const place = autocomplete.getPlace();
const address_components = place["address_components"] || [];

const postal_code = extractFromAddress(address_components, "postal_code");