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Compare object instances for equality by their attributes
...f __lt__(), __le__(), __gt__(), or __ge__() is needed in addition to that. From that, Python can infer the other methods. See functools for more information.
– kba
Nov 19 '13 at 1:42
...
DisplayName attribute from Resources?
... it is possible to have the DisplayName for a certain model property set from a Resource.
6 Answers
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How do I loop through a date range?
...g a method like this:
public IEnumerable<DateTime> EachDay(DateTime from, DateTime thru)
{
for(var day = from.Date; day.Date <= thru.Date; day = day.AddDays(1))
yield return day;
}
Then you can use it like this:
foreach (DateTime day in EachDay(StartDate, EndDate))
// pr...
How to delete multiple values from a vector?
...s.na (remove)))
a <- a [! is.na (a)]
(This does not distinguish NA from NaN but the R manual anyways warns that one should not rely on having a difference between them)
For Inf/ -Inf you'll have to check both sign and is.finite
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How to generate a random number in C++?
...y of one element - the first element of a pseudo-random sequence generated from seed equal to current time of second precision. What do you expect to see on output then?
Obviously when you happen to run application on the same second - you use the same seed value - thus your result is the same of co...
How to merge 2 List and removing duplicate values from it in C#
...ists List that I need to combine in third list and remove duplicate values from that lists
5 Answers
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How to subtract X day from a Date object in Java?
...ateTime.ofInstant(in.toInstant(), ZoneId.systemDefault());
Date out = Date.from(ldt.atZone(ZoneId.systemDefault()).toInstant());
Java 7 and earlier
Use Calendar's add() method
Calendar cal = Calendar.getInstance();
cal.setTime(dateInstance);
cal.add(Calendar.DATE, -30);
Date dateBefore30Days = c...
Android and setting width and height programmatically in dp units
...
You'll have to convert it from dps to pixels using the display scale factor.
final float scale = getContext().getResources().getDisplayMetrics().density;
int pixels = (int) (dps * scale + 0.5f);
...
Can I load a UIImage from a URL?
I have a URL for an image (got it from UIImagePickerController) but I no longer have the image in memory (the URL was saved from a previous run of the app). Can I reload the UIImage from the URL again?
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Generate a random date between two other dates
..., e.g. milliseconds, seconds, hours, days, whatever), subtract the earlier from the later, multiply your random number (assuming it is distributed in the range [0, 1]) with that difference, and add again to the earlier one. Convert the timestamp back to date string and you have a random time in tha...