Using Javascript slice inside angular expression - angularjs

Question

I receive a number representing a date in ddmmyy format eg.: 250615 i need transform into this format : 25/06/15.
I canot use the angular date filter because i receive a number.
I try to use slice in this way but only print the first number
{{ singularitem.Dia.slice(0,2)}} {{ singularitem.Dia.slice(2,2) }} {{ singularitem.Dia.slice(-2,2) }}
How can it be done ?
Thank´s in advance

Answer 1

Since you can't use the date filter, just create your own filter, doing whatever you want it to do:
app.filter('transformDate', function() {
return function(date) {
// Split string at every second character and combine them again with a `/` in between
return date.match(/.{1,2}/g).join('/');
}
})
Usage:
{{date | transformDate}}
Plunker: http://plnkr.co/edit/uBeT0eHOoAlHDUWydOpM?p=preview

Answer 2

You can go for a vanilla javascript function. If your format is always dd/mm/yy check this function:
(function () {
var date = "250615";
date = date.slice(0, 2) + "/" + date.slice(2,4) + "/" + date.slice(4,6);
console.log(date);
})()
FIDDLE

Answer 3

Slice is a prototype function of Strings and Arrays, not numbers. You need to convert your number to string first.
If you want to convert that number to a date object, you'd need:
function parseDate(dateAsNumber) {
var dateAsString = "" + dateAsNumber;
var day = Number(dateAsString.substr(0, 2));
//months are index 0
var month = Number(dateAsString.substr(2,2)) - 1;
//assumming all dates are 2000+ since you only get 2 digits
var year = Number(dateAsString.substr(4,2)) + 2000;
var date = new Date(year, month, day);
return date;
}
Calling parseDate(250615) returns Thu Jun 25 2015 00:00:00 GMT-0700 (Pacific Daylight Time)