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Fetch the row which has the Max value for a column
... Couldn't this return duplicates? Eg. if two rows have the same user_id and the same date (which happens to be the max).
– jastr
Jun 15 '16 at 19:30
3
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Rails: create on has_one association
...Alternatively, if you do not want to trigger delete callback
Shop.create(user_id: user.id, title: 'Some unique title')
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Is it a good practice to use try-except-else in Python?
...... except: ... else: ... structure makes for very readable code:
try:
raw_value = int(input())
except ValueError:
value = some_processed_value
else: # no error occured
value = process_value(raw_value)
Compare to how it might work in other languages:
raw_value = input()
if valid_number(...
How to change variables value while debugging with LLDB in Xcode?
...ram context, using variables currently in scope. This command
takes 'raw' input (no need to quote stuff).
Syntax: expression --
Command Options Usage: expression [-f ] [-G ]
[-d ] [-u ] -- expression [-o] [-d
] [-u ] -- expression
-G <gdb-format> ( --gdb-...
CSS: how to add white space before element's content?
... to be colored, you might consider adding a thick left border to the first letter. (I'd almost-but-not-quite say "instead", because the indent can be an issue if you use both. But it feels dirty to me to rely solely on the border to indent.) You can specify how far away, and how wide, the color i...
Razor doesn't understand unclosed html tags
...tic HTML encoding that Razor does if you're trying to output HTML):
@Html.Raw("<html>")
(Html.Raw reference from MS - http://msdn.microsoft.com/en-us/library/gg568896(v=vs.111).aspx)
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Django ManyToMany filter()
...ing SQL that looks something like:
SELECT * FROM users WHERE id IN (SELECT user_id FROM userzones WHERE zone_id IN (1,2,3))
which is nice because it doesn't have any intermediate joins that could cause duplicate users to be returned
...
PHP “php://input” vs $_POST
...
The reason is that php://input returns all the raw data after the HTTP-headers of the request, regardless of the content type.
The PHP superglobal $_POST, only is supposed to wrap data that is either
application/x-www-form-urlencoded (standard content type for simple ...
Create a List of primitive int?
...s automatically boxed to Integer wrapper type. But it is a bad idea to use raw type lists, or for any generic type for that matter, in newer code.
I can add anything into this list.
Of course, that is the dis-advantage of using raw type. You can have Cat, Dog, Tiger, Dinosaur, all in one cont...
Excel Date to String conversion
...because in Dutch, 'year' is 'jaar' and 'hour' is 'uur' i.e. other starting letters (while 'day', 'month', 'minutes' and 'seconds' start with the same letters in both Dutch and English). Basically, translate the starting letters of the formats to the language of your OS.
– Sem V...