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How can I select rows with most recent timestamp for each key value?
...a sensor id, a timestamp, and other fields. I want to select a single row with latest timestamp for each sensor, including some of the other fields.
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C# Entity-Framework: How can I combine a .Find and .Include on a Model Object?
...d something when creating the scaffold for the album manager (add delete edit).
5 Answers
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What is the difference between 'typedef' and 'using' in C++11?
I know that in C++11 we can now use using to write type alias, like typedef s:
7 Answers
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Get file size, image width and height before upload
...ow can I get the file size, image height and width before upload to my website, with jQuery or JavaScript?
7 Answers
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If string is empty then return some default value
Often I need to check if some value is blank and write that "No data present" like that:
6 Answers
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Correct way to use get_or_create?
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From the documentation get_or_create:
# get_or_create() a person with similar first names.
p, created = Person.objects.get_or_create(
first_name='John',
last_name='Lennon',
defaults={'birthday': date(1940, 10, 9)},
)
# get_or_create() didn't have to create an object.
>>&...
How do you disable browser Autocomplete on web form field / input tag?
...commentary from May 5, 2014:
The password manager always prompts if it wants to save a password. Passwords are not saved without permission from the user.
We are the third browser to implement this change, after IE and Chrome.
According to the Mozilla Developer Network documentation, t...
How to know what the 'errno' means?
When calling execl(...) , I get an errno=2 . What does it mean? How can I know the meaning of this errno ?
15 Answers
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Printing all global variables/local variables?
...follow
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edited Jun 17 '14 at 12:24
Miles Rout
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Avoiding memory leaks with Scalaz 7 zipWithIndex/group enumeratees
...ess1.chunk(4)
pipe process1.fold(0L) {
(c, vs) => c + vs.map(_._1.length.toLong).sum
}).runLast.run
This should work with any value for the n parameter (provided you're willing to wait long enough) -- I tested with 2^14 32MiB arrays (i.e., a total of half a TiB of memory allocated ...