object comparison

object_comparision.js

// object test for equality fails as object need to be pointing to same reference in memory
// primitives like strings and numbers are compared by their value
function greetFailing(person) {  
  if (person == { name: 'amy' }) {
    return 'hey amy'
  } else {
    return 'hey arnold'
  }
}

// JSON.stringify() method converts a JavaScript value to a JSON string, for comparison
// or use library for object compare, ie lodash
function greetWorking(person) {  
  if (JSON.stringify(person) == JSON.stringify({ name: 'amy' })) {
    return 'hey amy'
  } else {
    return 'hey arnold'
  }
}

greetFailing({ name: 'amy' });
greetWorking({ name: 'amy' });