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How much is the overhead of smart pointers compared to normal pointers in C++?
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std::unique_ptr has memory overhead only if you provide it with some non-trivial deleter.
std::shared_ptr always has memory overhead for reference counter, though it is very small.
std::unique_ptr has time overhead only during constructor (if ...
PUT vs. POST in REST
...forming the action to?" to distinguish what you should be using. Let's assume you're designing an API for asking questions. If you want to use POST then you would do that to a list of questions. If you want to use PUT then you would do that to a particular question.
Great both can be used, so whic...
what exactly is device pixel ratio?
this is mentioned every article about mobile web, but nowhere I can found an explanation of what exactly does this attribute measure.
Can anyone please elaborate what does queries like this check?
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What is the difference between Google App Engine and Google Compute Engine?
...ween App Engine & Compute Engine are. Can anyone explain the difference to me?
11 Answers
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How to use git bisect?
I have read some articles saying that git bisect is awesome. However, I'm not a native speaker and I can't understand why it's awesome.
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In which order should floats be added to get the most precise result?
...I was asked at my recent interview and I want to know (I don't actually remember the theory of the numerical analysis, so please help me :)
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Why do == comparisons with Integer.valueOf(String) give different results for 127 and 128?
...ct to the equivalence operator you're using and the datatypes you have - namely, int and Integer. You're getting an Integer from valueOf on the right hand side, of course.
After the conversion, you're comparing two primitive int values. Comparison happens just as you would expect it to with respec...
Generate all permutations of a list without adjacent equal elements
... the remaining item types unless it was just taken. (See also Coady's implementation of this algorithm.)
import collections
import heapq
class Sentinel:
pass
def david_eisenstat(lst):
counts = collections.Counter(lst)
heap = [(-count, key) for key, count in counts.items()]
heapq...
Foreign Key to multiple tables
...ble dbo.PartyType
(
PartyTypeId tinyint primary key,
PartyTypeName varchar(10)
)
insert into dbo.PartyType
values(1, 'User'), (2, 'Group');
create table dbo.Party
(
PartyId int identity(1,1) primary key,
PartyTypeId tinyint references dbo.PartyType(PartyTypeId),
unique ...
Peak detection in a 2D array
I'm helping a veterinary clinic measuring pressure under a dogs paw. I use Python for my data analysis and now I'm stuck trying to divide the paws into (anatomical) subregions.
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