Array(3)
0: Appointment
area: "S. Eter"
data: "2019-05-23T12:40:55.155+01:00"
description: "Sprint CS WEB"
horaFinal: "2019-05-21T11:40:59.028Z"
horaInicial: "2019-05-21T11:40:59.028Z"
id: 17
__proto__: Object
1: Appointment
area: "S. Confiança"
data: "2019-05-23T12:40:55.155+01:00"
description: "AR"
horaFinal: "2019-05-21T16:45:15.448+01:00"
horaInicial: "2019-05-21T16:00:15.448+01:00"
id: 18
__proto__: Object
2: Appointment
area: "djdndjsnsnsnzznj"
data: "2019-05-23T11:18:24.596+01:00"
description: "xbxnxnsnsjsjdjdkssjdjsjsk"
horaFinal: "2019-05-22T10:42:46.770Z"
horaInicial: "2019-05-22T11:41:46.769+01:00"
id: 23
__proto__: Object

this.appointments.sort(function(a, b) {
        var textA = a.horaInicial.toUpperCase();
        var textB = b.horaInicial.toUpperCase();
        return (textA < textB) ? -1 : (textA > textB) ? 1 : 0;
     });