Help please me with sorting. I have to sort object with custom string date
var object = [{
name: "something",
date: "23.12.2016"
},
{
name: "something2",
date: "19.12.2016"
}]
how sort object like this?
I already tried with sort function return new Date(a.date) - new Date(b.date); but had nothing it doesn't work
Thanks !
You could split the date and rearrange it as iso date and sort by string with localeCompare.
var object = [{ name: "something", date: "23.12.2016" }, { name: "something2", date: "19.12.2016" }];
object.sort(function (a, b) {
var aa = a.date.split('.'),
bb = b.date.split('.');
return [aa[2], aa[1], aa[0]].join('-').localeCompare([bb[2], bb[1], bb[0]].join('-'));
});
console.log(object);You could use as well String#replace for reordering the string.
var object = [{ name: "something", date: "23.12.2016" }, { name: "something2", date: "19.12.2016" }];
object.sort(function (a, b) {
var aa = a.date.replace(/(..).(..).(....)/, '$3-$2-$1'),
bb = b.date.replace(/(..).(..).(....)/, '$3-$2-$1');
return aa.localeCompare(bb);
});
console.log(object);The solution using Date.parse() and String.prototype.replace() functions(to sort by timestamps):
var date_objects = [{ name: "something", date: "23.12.2016" }, { name: "something2", date: "19.12.2016" }];
date_objects.sort(function(a,b){
return Date.parse(a.date.replace(/^(\d{2})\.(\d{2})\.(\d{4})$/, '$3-$2-$1'))
- Date.parse(b.date.replace(/^(\d{2})\.(\d{2})\.(\d{4})$/, '$3-$2-$1'))
});
console.log(date_objects);Out of curiosity, I tried a variation about Nina Scholz's answer, maybe it's faster, maybe not. I find reformatting the date quite obvious, but it's also time-consuming. In my version the duplicate indices are probably a problem, but as you stated that the format is zero-padded, this will work:
var object = [{ name: "something", date: "23.12.2016" }, { name: "something2", date: "19.12.2016" }];
object.sort(function (a, b) {
return (a.date[6] - b.date[6])
|| (a.date[7] - b.date[7])
|| (a.date[8] - b.date[8])
|| (a.date[9] - b.date[9])
|| (a.date[3] - b.date[3])
|| (a.date[4] - b.date[4])
|| (a.date[0] - b.date[0])
|| (a.date[1] - b.date[1]);
});
console.log(object);
01.01.2017?