大约有 48,000 项符合查询结果(耗时:0.0517秒) [XML]

https://stackoverflow.com/ques... 

Can't escape the backslash with regex?

...tring parser will remove two of them when "de-escaping" it for the string, and then the regex needs two for an escaped regex backslash). For instance: regex("\\\\") is interpreted as... regex("\\" [escaped backslash] followed by "\\" [escaped backslash]) is interpreted as... regex(\\) is i...
https://stackoverflow.com/ques... 

Import module from subfolder

... What would the syntax be if previously Foo1 was in the parent directory and one coded something like from Foo1 import *. Is there a way to achieve that same effect so you don't have to prefix everything with Foo1? – jxramos Apr 12 '17 at 23:41 ...
https://stackoverflow.com/ques... 

Difference between declaring variables before or in loop?

...etter, a or b? From a performance perspective, you'd have to measure it. (And in my opinion, if you can measure a difference, the compiler isn't very good). From a maintenance perspective, b is better. Declare and initialize variables in the same place, in the narrowest scope possible. Don't leave...
https://stackoverflow.com/ques... 

Sorting a Python list by two fields

... how will i proceed if i want to sort ascending on one element and descending on other, using itemgetter??. – ashish Oct 12 '13 at 10:13 ...
https://stackoverflow.com/ques... 

Convert a JSON string to object in Java ME?

... I used a few of them and my favorite is, http://code.google.com/p/json-simple/ The library is very small so it's perfect for J2ME. You can parse JSON into Java object in one line like this, JSONObject json = (JSONObject)new JSONParser().pars...
https://stackoverflow.com/ques... 

Difference between /res and /assets directories

...le system, but I would like to know, in general, when it's best to use one and the other. Can anyone help me in knowing the real differences between res and assets? ...
https://stackoverflow.com/ques... 

Covariance, Invariance and Contravariance explained in plain English?

Today, I read some articles about Covariance, Contravariance (and Invariance) in Java. I read the English and German Wikipedia article, and some other blog posts and articles from IBM. ...
https://stackoverflow.com/ques... 

How do I remove duplicate items from an array in Perl?

..., but if you were to add sorting in this function then it would trump $::a and $::b, wouldn't it? – vol7ron Feb 21 '12 at 16:45 5 ...
https://stackoverflow.com/ques... 

Difference between Destroy and Delete

... ActiveRecord::Persistence.delete Deletes the record in the database and freezes this instance to reflect that no changes should be made (since they can't be persisted). Returns the frozen instance. The row is simply removed with an SQL DELETE statement on the record's primary key, and no...
https://stackoverflow.com/ques... 

How to understand Locality Sensitive Hashing?

...mmds/ch3a.pdf Also I recommend the below slide: http://www.cs.jhu.edu/%7Evandurme/papers/VanDurmeLallACL10-slides.pdf . The example in the slide helps me a lot in understanding the hashing for cosine similarity. I borrow two slides from Benjamin Van Durme & Ashwin Lall, ACL2010 and try to expl...