## Yatra.com Interview Question for SDE-2s

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Country: India
Interview Type: Phone Interview

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hjhjh

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``````var dates = [
'1 Sep 2016 - 10 Sep 2016',
'1 Jan 2009 - 31 Aug 2015',
]

function generateFn (dates) {
var times = []
for (var i = 0; i < dates.length; ++i) {
var twoDates = dates[i].split(' - ')
times.push([
new Date(twoDates[0]).valueOf(),
new Date(twoDates[1]).valueOf(),
dates[i],
])
}
return function (date) {
var time = new Date(date).valueOf()
for (var i = 0; i < times.length; ++i) {
if (
time >= times[i][0] &&
time <= times[i][1]
) {
return times[i][2]
}
}
return null
}
}

var fn = generateFn(dates)
var date = '12 Jan 2014'
var result = fn(date)``````

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``````import htsjdk.samtools.util.IntervalTree;

import java.time.LocalDate;
import java.time.format.DateTimeFormatter;
import java.util.Iterator;
import java.util.stream.Stream;

/*
Found an implementation of the interval tree (Samtools.github.io//htsjdk/) instead of implementing it!

Insert date intervals into an interval tree. Each date could be converted to a long or int
denoting number of days from the Epoch ( to simplify the problem).
You can query for the list of all intervals into which a particular day can drop using
the tree. You query with an interval where the lower range (day) and the upper range (day) are
the same.
*/

public class App {
public static void main(String[] args) {

final IntervalTree <String> tree = new IntervalTree<>();
DateTimeFormatter formatter = DateTimeFormatter.ofPattern("MM/dd/yyyy");

String [] [] dateIntervals = {
{"09/01/2016", "09/10/2016"},
{"09/11/2016", "09/13/2016"},
{"09/14/2016", "09/22/2016"},
{"09/15/2016", "09/16/2016"},
{"10/01/2016", "10/10/2016"},
{"10/11/2016", "10/12/2016"},
{"10/13/2016", "10/14/2016"},
{"10/15/2016", "10/16/2016"},
{"10/01/2016", "10/01/2017"},
{"10/02/2017", "10/12/2017"},
{"10/10/2016", "10/13/2016"},
{"10/10/2016", "10/15/2016"},
{"10/10/2016", "10/16/2016"},
{"10/10/2016", "10/18/2016"},
};
Stream.of(dateIntervals).forEach (r -> {
int dateLow = (int) LocalDate.parse(r[0], formatter).toEpochDay();
System.out.println(dateLow
);
int dateHigh = (int) LocalDate.parse(r[1], formatter).toEpochDay();
System.out.println(dateHigh);
System.out.println(dateLow + " " +  dateHigh  +" " + r[0]+ "~"+ r[1]);
tree.put (dateLow, dateHigh, r[0]+ "~"+ r[1]);
});

Iterator<IntervalTree.Node<String>> query = tree.overlappers(17085, 17085 );
while (query.hasNext()) {
System.out.println(query.next());
}
}

}``````

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