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Are tuples more efficient than lists in Python?
... lists, moving this structure to tuples decreased lookup times by multiple orders of magnitude for multiple lookups. I believe this to be due to the greater cache locality of the tuple once you start using the tuple due to the removal of the second layer of indirection you demonstrate.
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Using do block vs braces {}
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Ruby cookbook says bracket syntax has higher precedence order than do..end
Keep in mind that the bracket syntax
has a higher precedence than the
do..end syntax. Consider the following
two snippets of code:
1.upto 3 do |x|
puts x
end
1.upto 3 { |x| puts x }
# SyntaxE...
java.lang.ClassNotFoundException: Didn't find class on path: dexpathlist
...nstant Run is still so buggy to the extend that you have to turn it off in order to avoid nasty surprises...
– Ognyan
Oct 1 '17 at 10:54
2
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Entity Framework select distinct name
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In order to avoid ORDER BY items must appear in the select list if SELECT DISTINCT error, the best should be
var results = (
from ta in DBContext.TestAddresses
select ta.Name
)
.Distinct()
.OrderBy( x => 1);
...
Size of Matrix OpenCV
...e, here 2 for z axis, 3 for y axis, 4 for x axis.
By x, y, z, it means the order of the dimensions. x index changes the fastest.
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How do I get the n-th level parent of an element in jQuery?
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Since parents() returns the ancestor elements ordered from the closest to the outer ones, you can chain it into eq():
$('#element').parents().eq(0); // "Father".
$('#element').parents().eq(2); // "Great-grandfather".
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Unable to execute dex: Multiple dex files define
...ing into ActionBarSherlock --> Properties --> Java Build path --> Order of Export and unselecting Android Private Libraries. Then going into Project -> Clean and now you should be able to build the project correctly.
Now, for some reason, every time I restart Eclipse, it automatically e...
How do CUDA blocks/warps/threads map onto CUDA cores?
...blocks with 6 threads = 64 warps * 10 instructions = 640 instructions
In order to get optimal efficiency the division of work should be in multiples of 32 threads. The hardware will not coalesce threads from different warps.
3'. A GTX560 can have 8 SM * 8 blocks = 64 blocks at a time or 8 SM * 48...
Java HashMap performance optimization / alternative
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One thing I notice in your hashCode() method is that the order of the elements in the arrays a[] and b[] don't matter. Thus (a[]={1,2,3}, b[]={99,100}) will hash to the same value as (a[]={3,1,2}, b[]={100,99}). Actually all keys k1 and k2 where sum(k1.a)==sum(k2.a) and sum(k1.b)=s...
What is an Endpoint?
...he OAuth 1.0a community spec). This is a URI that you send a request to in order to obtain an unauthorized Request Token from the server / service provider.
Resource Owner Authorization URI (called the User Authorization URL in the OAuth 1.0a community spec). This is a URI that you direct the user ...