大约有 40,000 项符合查询结果（耗时：0.0697秒） [XML]
How to do parallel programming in Python?
... the multiprocessing module. For this case I might use a processing pool:
from multiprocessing import Pool
pool = Pool()
result1 = pool.apply_async(solve1, [A]) # evaluate "solve1(A)" asynchronously
result2 = pool.apply_async(solve2, [B]) # evaluate "solve2(B)" asynchronously
answer1 = result...
Short description of the scoping rules?
...
Actually, a concise rule for Python Scope resolution, from Learning Python, 3rd. Ed.. (These rules are specific to variable names, not attributes. If you reference it without a period, these rules apply.)
LEGB Rule
Local — Names assigned in any way within a function (def or...
How to get the build/version number of your Android application?
...tually this is the best solutions after Android Studio was launched !!! +1 from my side
– Dhruvil Patel
Nov 3 '14 at 10:38
...
How to set or change the default Java (JDK) version on OS X?
...
This did not work for me. Grab the path from running java_home -V and add this to the export command, like this export JAVA_HOME="/System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home"
– oden
Nov 28 '14 at 1:04
...
Double vs. BigDecimal?
...
There are two main differences from double:
Arbitrary precision, similarly to BigInteger they can contain number of arbitrary precision and size
Base 10 instead of Base 2, a BigDecimal is n*10^scale where n is an arbitrary large signed integer and scale ...
How to get Linux console window width in Python
...ly universal on linux. It opens the 'stty size' command as a file, 'reads' from it, and uses a simple string split to separate the coordinates.
Unlike the os.environ["COLUMNS"] value (which I can't access in spite of using bash as my standard shell) the data will also be up-to-date whereas I believ...
What is the difference between persist() and merge() in JPA and Hibernate?
...peration is
cascaded to entities referenced by X,
if the relationships from X to these
other entities are annotated with the
cascade=PERSIST or cascade=ALL
annotation element value or specified
with the equivalent XML descriptor
element.
If X is a removed entity,
it becomes managed...
read string from .resx file in C#
How to read the string from .resx file in c#? please send me guidelines . step by step
14 Answers
...
How can I remove a key and its value from an associative array?
...e4");
To remove an element using the array key:
// To unset an element from array using Key:
unset($arr["key2"]);
var_dump($arr);
// output: array(3) { ["key1"]=> string(6) "value1" ["key3"]=> string(6) "value3" ["key4"]=> string(6) "value4" }
To remove element by value:
// remove an ...
Verifying signed git commits?
...the formatted tag object.
This allows callers to cross-check the tagname from refs/tags with
the tagname from the tag object header upon GPG verification.
Git 2.16 (Q1 2018) will allow the commit signature verification to be even more automated, with the merge.verifySignatures configuration ...