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Django rest framework nested self-referential objects
... the `subcategories` field
return CategorySerializer()
Actually, as you've noted the above isn't quite right.
This is a bit of a hack, but you might try adding the field in after the serializer is already declared.
class CategorySerializer(serializers.ModelSerializer):
parentCat...
Multiplication on command line terminal
...ld have shown non-integer operands instead of only a non-integer result in order to accurately counter the assertion. Never fear, echo '4 k 50.5 7 / p' | dc works (output: 7.2142).
– Paused until further notice.
Jun 15 '12 at 1:54
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Is there a way to access method arguments in Ruby?
... "#{arg} = #{eval arg}" }.join(', ')
Note: since this answer was originally written, in current versions of Ruby eval can no longer be called with a symbol. To address this, an explicit to_s has been added when building the list of parameter names i.e. parameters.map { |arg| arg[1].to_s }
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What are the advantages of NumPy over regular Python lists?
... Python objects, at least 4 bytes per pointer plus 16 bytes for even the smallest Python object (4 for type pointer, 4 for reference count, 4 for value -- and the memory allocators rounds up to 16). A NumPy array is an array of uniform values -- single-precision numbers takes 4 bytes each, double-pr...
In Scala, what exactly does 'val a: A = _' (underscore) mean?
....0d if T is Double,
false if T is Boolean,
() if T is Unit,
null for all other types T.
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Comparing mongoose _id and strings
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The accepted answers really limit what you can do with your code. For example, you would not be able to search an array of Object Ids by using the equals method. Instead, it would make more sense to always cast to string and compare the keys.
Her...
Why does sudo change the PATH?
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Yeah, but it's totally counterintuitive. It probably fools the good guys more than the bad guys.
– Brian Armstrong
Jun 20 '09 at 2:24
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How do short URLs services work?
...r tiny urls. You'll mistakenly hear that they create a hash of the URL in order to generate that unique code for the shortened URL. This is incorrect in most cases, they aren't using a hashing algorithm (where you could potentially have collisions).
Most of the popular URL shortening services simp...
“is” operator behaves unexpectedly with integers
...3):
The current implementation keeps an
array of integer objects for all
integers between -5 and 256, when you
create an int in that range you
actually just get back a reference to
the existing object. So it should be
possible to change the value of 1. I
suspect the behaviour of Py...
A transport-level error has occurred when receiving results from the server [closed]
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Can you provide some details on what that actually does? Are there any reasons against setting such a value globally?
– Drew Noakes
Dec 5 '10 at 19:02
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