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How to: sort NSArray by date in descending order with nil date left on top of result set


How to: sort NSArray by date in descending order with nil date left on top of result set

By : Nick Stepanek
Date : November 17 2020, 11:52 AM
will help you I have the following method where self.orderHeader.meetings is a core data NSManagedObject with meetings being a list of metting. The method sorts the meetings by date (meetingDate): , Try something like this:
code :
NSArray *sortedMeetings = [unsortedMeetings sortedArrayUsingComparator:^NSComparisonResult(MeetingObjectClass *obj1, MeetingObjectClass *obj2) {
    if (!obj1.meetingDate)
        return NSOrderedAscending;
    if (!obj2.meetingDate)
        return NSOrderedDescending;
    return [obj2.meetingDate compare:obj1.meetingDate];
}];


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How to Sort Date in descending order From Arraylist Date in android?

How to Sort Date in descending order From Arraylist Date in android?


By : Mona Mehdizadeh
Date : March 29 2020, 07:55 AM
will be helpful for those in need Create Arraylist of Date class. And use Collections.sort() for ascending order.
See sort(List list)
code :
Collections.sort(yourList, Collections.reverseOrder());
Sort array on string date value not returning the correct result order (descending)

Sort array on string date value not returning the correct result order (descending)


By : Ryan Wong
Date : March 29 2020, 07:55 AM
wish helps you Please use moment library to firstly format the date in 'DD/MM/YYYY HH:mm:ss' and below code will sort and returns result as you are looking for x.sort((a,b)=>{ return moment(a,'DD/MM/YYY HH:mm:ss').isAfter(moment(b,'DD/MM/YYY HH:mm:ss')) ? -1 : 1 })
How to sort date by descending order and time by ascending order using Pandas

How to sort date by descending order and time by ascending order using Pandas


By : Santosh Achari
Date : March 29 2020, 07:55 AM
fixed the issue. Will look into that further If need sorting by dates and times create new columns for sorting by DataFrame.assign, then sort by both columns with DataFrame.sort_values and ascending parameter, because sorting by dates is descending and by times is ascending and last remove helper columns with DataFrame.drop:
code :
df1 = (df.assign(d=df['time'].dt.date,
                 t=df['time'].dt.time)
         .sort_values(['d','t'], ascending=[False, True])
         .drop(['d','t'], axis=1))
print (df1)
                 time    Open
2 2017-01-03 07:00:00  5.2128
1 2017-01-03 08:00:00  5.2180
0 2017-01-03 09:00:00  5.2475
5 2017-01-02 07:00:00  5.2475
4 2017-01-02 08:00:00  5.2123
3 2017-01-02 09:00:00  5.4122
8 2017-01-01 07:00:00  5.4122
7 2017-01-01 08:00:00  5.2128
6 2017-01-01 09:00:00  5.2180
df1 = (df.groupby(df['time'].dt.date, sort=False, group_keys=False)
         .apply(lambda x: x.sort_values('time')))
print (df1)
                 time    Open
2 2017-01-03 07:00:00  5.2128
1 2017-01-03 08:00:00  5.2180
0 2017-01-03 09:00:00  5.2475
5 2017-01-02 07:00:00  5.2475
4 2017-01-02 08:00:00  5.2123
3 2017-01-02 09:00:00  5.4122
8 2017-01-01 07:00:00  5.4122
7 2017-01-01 08:00:00  5.2128
6 2017-01-01 09:00:00  5.2180
Sort array by date in descending order by date in php

Sort array by date in descending order by date in php


By : teeth
Date : March 29 2020, 07:55 AM
around this issue I have an array and I want to sort it by date. I am not able to sort it properly by date in descending order. Please help. , Try like this
sort date into descending order

sort date into descending order


By : Gwang Hwan Ryu
Date : March 29 2020, 07:55 AM
Hope this helps I want to display the date into descending order in Gridview as default. , Just add:
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