In case if dates in the array are intersect then function should combine them in one period, else periods should be separated
var dates = [
{
"from":"03/01/2021",
"to":"03/05/2021"
},
{
"from":"03/08/2021",
"to":"03/10/2021"
},
{
"from":"03/07/2021",
"to":"03/20/2021"
}
];
var item = dates;
var index = 0;
var out = document.querySelector('#test');
for(var i = 0; i < item.length; i++){
index++;
var from_i = Date.parse(item[i].from);
var to_i = Date.parse(item[i].to);
var from_index = Date.parse(item[index].from);
var to_index = Date.parse(item[index].to);
if(from_index >= from_i && from_index <= to_i){
let updated_from = new Date(from_index);
let update_to = new Date(to_index);
console.log(updated_from);
out.innerHTML += updated_from.toDateString() + update_to.toDateString() + "<br/>";
}
}<div id="test"> </div>Case of incoming jSON: [ { "from":"03/01/2021", "to":"03/06/2021" }, { "from":"03/10/2021", "to":"03/15/2021" }, { "from":"03/20/2021", "to":"03/25/2021" } ]
Output: Mar 1-5, 7-20
Can some help? Learning JS…little bit hard for me(
you can do something like this
const data = [ { "from":"03/01/2021", "to":"03/06/2021" }, { "from":"03/10/2021", "to":"03/15/2021" }, { "from":"03/20/2021", "to":"03/25/2021" } ]
const monthToString = month => {
const months = {
'01': 'Jan',
'02': 'Feb',
'03': 'Mar',
'04': 'Apr',
'05': 'May',
'06': 'Jun',
'07': 'Jul',
'08': 'Aug',
'09': 'Sep',
'10': 'Oct',
'11': 'Nov',
'12': 'Dec',
}
return months[month] || month
}
const result = Object.entries(data.reduce((res, {from, to}) => {
const [monthFrom, day, year] = from.split('/')
const [m, dayTo, y] = to.split('/')
const month = monthToString(m)
return {
...res,
[month]: [...(res[month] || []), [day, dayTo]]
}
}, {})).map(([month, days]) => `${month} ${days.map(([from, to]) => `${parseInt(from)}-${parseInt(to)}`).join(', ')}`).join('\n')
console.log(result)