How to validate key order in javascript object using Joi?

问题

I want to validate object that keys should be in asending order e.g.

// valid because all keys are in order
var object = {
    0: 'alok',
    1: 'singh',
    2: 'mahor'
}

// not valid because all keys are not in order
var object = {
    2: 'alok',
    0: 'singh',
    1: 'mahor'
}

// not valid because all keys are not in order
var object = {
    1: 'alok',
    2: 'singh',
    0: 'mahor'
}

// this is not capable of checking key order
var schema = Joi.object({
  0: Joi.string(),
  1: Joi.string(),
  2: Joi.string()
});

how can I validate order of keys using Joi?

来源：https://stackoverflow.com/questions/58933028/how-to-validate-key-order-in-javascript-object-using-joi