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Haskell: Lists, Arrays, Vectors, Sequences
...ng wording, because if you are making many modifications (like repeatedly (100k times) evolving 100k elements ) , then you do need ST/IO Vector to get acceptable performance,
– misterbee
Mar 9 '12 at 3:08
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What's faster, SELECT DISTINCT or GROUP BY in MySQL?
...ct with a fairly complicated query. Just adding this as a datapoint. About 100k rows. So test it and see for yourselves.
– Lizardx
Feb 21 '16 at 22:32
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facebook: permanent Page Access Token?
...nyone who gets to the last step, and the browser just returns: message: "(#100) Tried accessing nonexisting field (accounts) on node type (Page)", type: "OAuthException", code: 100 go to the FB Access Token Debugger and test your long_lived_access_token. Consistently I've seen that after a few min...
initialize a numpy array
...iter() might be slower than np.array(). timeit("np.array(i for i in xrange(100))", setup="import numpy as np", number = 10000) -> 0.02539992332458496, versus timeit("np.fromiter((i for i in xrange(100)), dtype=int)", setup="import numpy as np", number = 10000) -> 0.13351011276245117
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Start thread with member function
...= w->member1Thread();
std::thread tw2 = w->member2Thread("hello", 100);
tw1.join();
tw2.join();
return 0;
}
Compiling with g++ produces the following result
g++ -Wall -std=c++11 hello.cc -o hello -pthread
i am member1
i am member2 and my first arg is (hello) and second arg is (...
Count the number of occurrences of a string in a VARCHAR field?
...
In SQL SERVER, this is the answer
Declare @t table(TITLE VARCHAR(100), DESCRIPTION VARCHAR(100))
INSERT INTO @t SELECT 'test1', 'value blah blah value'
INSERT INTO @t SELECT 'test2','value test'
INSERT INTO @t SELECT 'test3','test test test'
INSERT INTO @t SELECT 'test4','valuevalueval...
On - window.location.hash - Change?
...nge will never fire, so it's better to store hash and check it after every 100 millisecond whether it's changed or not for all versions of Internet Explorer.
if (("onhashchange" in window) && !($.browser.msie)) {
window.onhashchange = function () {
alert(window.l...
Why is printing “B” dramatically slower than printing “#”?
I generated two matrices of 1000 x 1000 :
3 Answers
3
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What's the fastest way to do a bulk insert into Postgres?
...of millions of records into a postgres database. Presently I am executing 1000's of insert statements in a single "query".
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CSS background opacity with rgba not working in IE 8
... file, much like the way rgba works.
background: url(rgba.php?r=255&g=100&b=0&a=50) repeat;
background: rgba(255,100,0,0.5);
The script can be downloaded here: http://lea.verou.me/wp-content/uploads/2009/02/rgba.zip
I know it may not be the perfect solution for everybody, but it's wo...