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How do I use itertools.groupby()?
... very late to the party but might help someone. It's probably because your array is not sorted try groupby(sorted(my_collection, key=lambda x: x[0]), lambda x: x[0])) under the assumption that my_collection = [("animal", "bear"), ("plant", "cactus"), ("animal", "duck")] and you want to group by ani...
Nested attributes unpermitted parameters
...attributes. This also works if the nested attributes are in the form of an array.
Having said that, I wonder if there's a security concern with this approach because it basically permits anything that's inside the hash without specifying exactly what it is, which seems contrary to the purpose of st...
Try-catch speeding up my code?
... why the C# compiler generates so many extraneous locals. For example, new array initialisation expressions always generate a local, but is never necessary to generate a local. If it allows the JITter to produce measurably more performant code, perhaps the C# compiler should be a bit more careful ab...
Most efficient way to concatenate strings in JavaScript?
... efficient way to create a string? I was thinking about creating a dynamic array where I keep adding strings to it and then do a join. Can anyone explain and give an example of the fastest way to do this?
...
What is the difference between memmove and memcpy?
... You can use 'restrict' keyword if you are working with long arrays and want to protect your copying process. For example if you method takes as parameters input and output arrays and you must verify that user does not pass the same address as input and output. Read more here stackover...
jQuery.parseJSON throws “Invalid JSON” error due to escaped single quote in JSON
...ke in my implementation that looks like this (PHP - server side):
$data = array();
$elem = array();
$elem['name'] = 'Erik';
$elem['position'] = 'PHP Programmer';
$data[] = json_encode($elem);
$elem = array();
$elem['name'] = 'Carl';
$elem['position'] = 'C Programmer';
$data[] = json_encode($elem)...
What does $$ (dollar dollar or double dollar) mean in PHP?
... While I agree that it can be useful, most of the times it's better to use arrays anyway.
– o0'.
Apr 26 '10 at 18:31
s...
SQL query to get all values a enum can have
...
If you want an array:
SELECT enum_range(NULL::myenum)
If you want a separate record for each item in the enum:
SELECT unnest(enum_range(NULL::myenum))
Additional Information
This solution works as expected even if your enum is no...
Is object empty? [duplicate]
...t with non-enumerable properties and Object.keys will just return an empty array... Object.getOwnPropertyNames returns an array containing all the own properties of an object, even if they aren't enumerable.
– Christian C. Salvadó
Feb 14 '11 at 16:11
...
How does the algorithm to color the song list in iTunes 11 work? [closed]
...similar colors and then find the largest bucket.
DominantColorSimple[pixelArray_] :=
Module[{buckets},
buckets = Gather[pixelArray, ColorDistance[#1,#2] < .1 &];
buckets = Sort[buckets, Length[#1] > Length[#2] &];
RGBColor @@ Mean @ First @ buckets
]
...