var names = [
  "Alex",
  "Matthew",
  "Joe"
]

names.every(function(name){
  return name.length > 4
})

names.some(function(name){
  return name.length > 4
})




// text input field
function Field(value) {
  this.value = value
}

Field.prototype.validate = function() {
  return this.value.length > 0
}

var username = new Field("2cool")
var password = new Field("8sdfb36_@eef")

// what if there will be much more fields. Like 20 fields
// here the every or some function would be helpful
username.validate() && password.validate()

var fields = [username, password]

var formsAreValid = fields.every(function(field) {
  return field.validate()
})

if ( formsAreValid ) {
  // user can subscribe
} else {
  // show error message
}



// Online Course Tests

// every
var users = [
  { id: 21, hasSubmitted: true },
  { id: 62, hasSubmitted: false },
  { id: 4, hasSubmitted: true }
];

var hasSubmitted = users.every(function(user) {
  return user.hasSubmitted === true
})

// some
var requests = [
  { url: '/photos', status: 'complete' },
  { url: '/albums', status: 'pending' },
  { url: '/users', status: 'failed' }
];

var inProgress = requests.some(function(request){
    return request.status === 'pending'
})