大约有 47,000 项符合查询结果（耗时：0.0493秒） [XML]
Fastest way to list all primes below N
...tmp) )//const
del_mult(tmptk[off], start, prime)
# now we go back to top tk1, so we need to increase pos by 1
pos += 1
cpos = const * pos
# 30k + 1
if tk1[pos]:
prime = cpos + 1
p.append(prime)
lastadded = 1
...
Null vs. False vs. 0 in PHP
...s.
0 is an int. Nothing to do with the rest above, used for mathematics.
Now, what is tricky, it's that in dynamic languages like PHP, all of them have a value in a boolean context, which (in PHP) is False.
If you test it with ==, it's testing the boolean value, so you will get equality. If you t...
Lock-free multi-threading is for real threading experts
...accesses, to hide main memory latency and make better use of their cache.
Now, it is sure against intuition that a sequence of code does not flow "top-down", instead it runs as if there was no sequence at all - and may be called "devil's playground". I believe it is infeasible to give an exact answ...
Select which href ends with some string
... something changed recently. $('[href$=-abc]') used to work. Now it requires quotes $('[href$="-abc"]') I don't know when it changed. Maybe it was always supposed to require quotes and just happened to work before.
– gman
Jul 25 '11 at 7:34
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Android: upgrading DB version and adding new table
I've already created sqlite tables for my app, but now I want to add a new table to the database.
5 Answers
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When should one use final for method parameters and local variables?
...that affects the immutability.)
Final static fields - Although I use enums now for many of the cases where I used to use static final fields.
Consider but use judiciously:
Final classes - Framework/API design is the only case where I consider it.
Final methods - Basically same as final classes. ...
Loading and parsing a JSON file with multiple JSON objects
...o parse it all in one go or to figure out a streaming JSON parser. You can now opt to process each line separately before moving on to the next, saving memory in the process. You probably don't want to append each result to one list and then process everything if your file is really big.
If you hav...
Determine version of Entity Framework I am using?
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Now there are three versions and EFV5 is associated with .NET 4.5 and as of now, EFv6 is under construction
– Farax
Sep 19 '13 at 1:32
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Is there a properly tested alternative to Select2 or Chosen? [closed]
... suite of tests using a combination of testem, syn, mocha, and chai. Right now there are the following classes of tests:
InteractionFunctional tests that makes sure the control behaves as if the user is using it (using syn).
SetupEnsures the control can be initialized properly from existing <se...
Ways to circumvent the same-origin policy
...is to use custom HTTP headers to allow both the browser and the server to know enough about each other to determine if the request or response should succeed or fail.
For a simple request, one that uses either GET or POST with no custom headers and whose body is text/plain, the request is sent with...