gistfile1.txt

var passcodes = {
  back: 3050,
  kitchen: 'open sesame',
}
passcodes['back'] = 12345
console.log(passcodes['back'])

var subjects = ['js', 'html', 'css', 'react', 'servers', 'aws']
console.log(subjects)
// subjects[6] = 'TypeScript'

// END OF ARRAY
// subjects.push('ts')
// subjects.pop()

// BEGINNING OF ARRAY
// subjects.shift()
// subjects.unshift('typescript')

subjects.splice(3, 0, 'node')

console.log(subjects)